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Sclerotinia 050609 (13.43 KB)
Published Date: Monday 8th June 2009
Overview: Most crops have finished flowering and seeds are turning green. A considerable number of crops are still at the late flowering stage. Pigeon and pest damaged crops are still likely to keep flowering for several weeks.
Sclerotinia stem rot symptoms are present in some crops in the Hereford area and in the south-west. High risk sites have 5-10% plants affected in untreated areas with lesions developing mainly below the mid-plant level. Fungicides have given good control. In the east and south only traces of infection have been reported so far. The return to unsettled weather could still produce some late infection, though this is unlikely to have much effect on yield.
Sclerotial germination has been lower than usual this season in the depots. However petal tests have confirmed that there has been considerable air-borne production in some fields even where germination was low in the depots. Germination is continuing at low levels and there has been some new activity after recent rain.
Spring oilseed rape is also susceptible to sclerotinia and fungicide treatment should be considered at early to mid-flowering whilst the weather remains unsettled. Crops are at early flowering or close to flowering at present. Cultivation to establish spring oilseed rape could well result in a later germination of sclerotia than that reported for winter oilseed rape. Risks will be higher where soils are moist to the surface.
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Sclerotinia Monitoring - 28th May 2009 (54.65 KB)
Published Date: Thursday 28th May 2009
Most crops have finished flowering and are overall green with full sized translucent seeds. Late crops are still flowering whilst pigeon and pest damaged crops are still likely to keep flowering for several weeks.
Sclerotinia stem rot symptoms are now present in some crops in the Hereford area and in the south-west. High risk sites have 5-10% plants affected with lesions developing mainly below the mid-plant level. Fungicides appear to have given good control. In the east, only traces of infection have been reported so far. The recent unsettled weather has resulted in more petal sticking and more infection could still develop.
Sclerotial germination has been lower than usual this season in the depots. However petal tests have confirmed that there has been considerable air-borne production in some fields even where germination was low in the depots. Germination is continuing at low levels and there has been some new activity after recent rain.. Minimum temperatures are now consistently above 7ºC, the threshold for infection. Crops at high risk sites may still benefit from second fungicide sprays where flowering will continue into June.
Spring oilseed rape is also susceptible to sclerotinia and fungicide treatment should be considered at early to mid-flowering whilst the weather remains unsettled. Cultivation to establish spring oilseed rape could well result in a later germination of sclerotia than that reported for winter oilseed rape. Risks will be higher where soils are moist to the surface.
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Sclerotinia Monitoring - 21 May 2009 (53.35 KB)
Published Date: Thursday 21st May 2009
Many crops have finished flowering and are overall green with full sized translucent seeds. Late crops are still flowering strongly whilst pigeon and pest damaged crops are likely to keep flowering for several weeks. Crops at high risk sites may still benefit from second sprays where flowering will continue up to the end of May. Sclerotial germination is now underway at all 6 depot sites and there has been some new germination after recent heavy rain. Minimum temperatures are now becoming more consistently above 7ºC, the threshold for infection. Some petal sticking has been reported during the last week but this is mainly very light.. Conditions appear to have been most favourable for sclerotinia infection in the west so far this season. Petal tests are showing high levels of sclerotinia at high risk sites (40-50% petals infected). Some early infection could be underway and first symptoms should be evident now.
Spring oilseed rape is also susceptible to sclerotinia and fungicide treatment should be considered at early flowering whilst the weather remains unsettled.
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Sclerotinia Monitoring - 14 May 2009 (53.04 KB)
Published Date: Thursday 14th May 2009
Many crops are rapidly coming to the end of flowering and are overall green with translucent seeds. Later crops are at full flowering whilst pigeon and pest damaged crops are at early flowering. The early end to flowering offers some savings in second fungicide sprays. Sclerotial germination is now underway at all 6 depot sites but the numbers of fruiting bodies (apothecia) has decreased in the recent dry conditions. The first germination has started in North Yorkshire this week. Minimum temperatures are still not consistently above 7ºC, the threshold for infection. Some petal sticking has been reported during the last week in the west and east. Conditions appear to have been most favourable for sclerotinia infection in the west so far this season. Petal tests are showing high levels of sclerotinia at high risk sites (40-50% petals infected). Some early infection could be underway and first symptoms should be evident by mid-May. It is now important to ensure flowering crops remain protected as the weather is unsettled. Where first fungicides were applied 2-3 weeks ago the second spray could be applied soon so that it gives good protection to crops likely to be flowering for the rest of May.
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Sclerotinia Monitoring - 7 May 2009 (52.29 KB)
Published Date: Thursday 7th May 2009
Crops are mainly at full flowering, but forward crops will soon be finished flowering. There is considerable variation within and between crops due to late sowing, variable establishment, pigeon and rabbit damage and lack of rain. Sclerotial germination is now underway at 5 of the 6 depot sites but progressing slowly where sites are dry. Minimum temperatures are still not regularly above 7ºC, the threshold for infection. Conditions have been favourable for sclerotinia infection in the west and in other areas where there has been rain recently. Petal tests are showing high levels of sclerotinia at high risk sites (40-50% petals infected) and only small changes between successive tests. Some infection could be underway and first symptoms should be evident by mid-May. It is now important to ensure flowering crops remain protected. Where first fungicides were applied 2-3 weeks ago the second spray could be applied soon so that it gives good protection for the rest of May.
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Sclerotinia Monitoring - 30 April 2009 (52.26 KB)
Published Date: Thursday 30th April 2009
Crops are mainly at full flowering with few buds remaining on the main raceme. Pods are developing well though some gaps and dead flower buds have been reported. The branches are flowering strongly. Forward crops are at the mid to late flowering stage. There is considerable variation within crops due to variable establishment, pigeon and rabbit damage and lack of rain.
Sclerotial germination is now underway at 5 of the 6 depot sites but progressing slowly where sites are dry. Minimum temperatures are struggling to get above 7ºC on some days so conditions have not been particularly favourable for sclerotinia infection recently. Petal tests are showing high levels of sclerotinia at high risk sites (40-50% petals infected). There has been rain in some areas this week and petal stick has occurred in some crops in the south and west. Some infection could be underway and symptoms should be evident in 2-3 weeks time It is now important to ensure flowering crops remain protected. Where first fungicides were applied 2-3 weeks ago the second spray could be applied later next week so that it gives good protection for the rest of May.
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Sclerotinia Monitoring - 23 April 2009 (51.88 KB)
Published Date: Thursday 23rd April 2009
Crops are mainly between early and mid-flowering with pods starting to develop in the more forward crops. There is considerable variation within crops as some plants are at mid-flowering whilst others are just starting to flower. Pigeon and rabbit damaged areas are still green. Late crops, particularly in the north, are still short and barely at the yellow bud stage. Where there are distinct yellow and green areas within fields, consider using different fungicide timings. Plant height is variable, mostly in the range 70-120 cm tall. Mean soil temperatures are starting to exceed 10ºC in southern and central regions and sclerotial germination is now underway at 5 of the 6 depot sites. Minimum temperatures are above 7ºC on some days so conditions are more favourable for sclerotinia infection than at the same stage last year. Rain is forecast in some areas in the next few days and this could give some sclerotinia infection where petal fall is underway. It is now important to ensure flowering crops are protected before the next rain. Where pgr treatments have been made, the sclerotinia fungicide should be applied 2-3 weeks later.
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Sclerotinia Monitoring - 16 April 2009 (49.13 KB)
Published Date: Thursday 16th April 2009
Crops are mainly in the early stages of flowering but there is considerable variation within and between fields. Late crops are still at the flower buds raised above the leaves stage. Where there are distinct yellow and green areas within fields, consider using different fungicide timings. Plant height is variable, mostly in the range 50-100 cm tall. Mean soil temperatures are starting to exceed 10ºC in southern and central regions and sclerotial germination is now underway at 3 of the depot sites. Minimum temperatures are above 7ºC on some days so conditions are more favourable for sclerotinia infection than at the same stage last year. Rain is forecast in some areas in the next few days and is likely to increase sclerotinia risk. It is now important to start making fungicide applications as crops reach early flowering. Where pgr treatments have been made, the sclerotinia fungicide should be applied 2-3 weeks later.
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Sclerotinia Monitoring Bulletin 56 (86.32 KB)
Published Date: Wednesday 28th May 2008
Most crops have finished flowering and seeds are translucent or green
in the pods. Late crops and pigeon damaged areas are likely to continue
flowering for some time as more branches are produced. Note that some
of the late flowering is charlock rather than oilseed rape. There have
been several days with heavy rain in many areas and this could still
lead to some new sclerotinia infection as there are still petals lodged
in the leaf axils. Will this repeat the 2007 pattern? Where petals are
sticking to the leaves there are leaf lesions caused by sclerotinia
and/or botrytis. More sclerotinia stem lesions have been confirmed in
the south, mainly at mid-stem level but a few are at soil level.
Sclerotinia stem symptoms at this stage probably indicate late April
infection. It is useful to assess disease levels now and again in 4
weeks time to gauge when infection occurred and to appraise control
strategies. In south, some alternaria has been found and this could
still cause problems if the weather remains unsettled. Final decisions
are required for alternaria to protect developing pods.
As soils are wet, sclerotinia germination has increased again at most
sites and may well continue after flowering to threaten other arable
crops. The highest total germination is at ADAS Rosemaund where there
has now been 49% germination, the same as last week. There was 7% new
germination at Boxworth, Cambs, 12% at the Kent site on Romney Marsh
and 8% at ADAS Terrington, giving rather similar total germination of
29-39% at sites in the east and south. The depot at High Mowthorpe on
the Yorkshire Wolds had 1% new germination and has still only had 2%
germination in total.
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Sclerotinia Monitoring Bulletin 55 (86.28 KB)
Published Date: Wednesday 21st May 2008
Most crops are
close to the end of flowering and have seeds expanding in the pods.
Forward crops have finished flowering. Late crops and pigeon damaged
areas are likely to continue flowering for time as more branches are
produced. Some petal sticking has been reported and leaf lesions are
becoming more evident particularly in the west. Sclerotinia and
botrytis are likely to be causing these lesions. The first sclerotinia
stem lesions are appearing in the Hereford area, indicating some
infection occurred in April (possible infection during 23-24 April and
29-30 April). More rain is forecast for late May Bank Holiday weekend
and this may provide the last conditions for petal sticking and
infection in later flowering crops. As the sclerotinia risk is still
present, a second fungicide treatment may be worthwhile to maintain
protection at high risk sites until the end of flowering. In south,
where alternaria continues to cause problems in a few crops each year,
final decisions are required to protect developing pods.
Sclerotinia germination has increased slightly at all sites in
southern, eastern and westem England and soils have remained moist at
the surface. The highest germination is at ADAS Rosemaund where there
has now been 49% germination, an increase of 3% since last week. There
was 4% new germination at Boxworth, Cambs, 11% at the Kent site on
Romney Marsh and 8% at ADAS Terrington, giving rather similar total
germination of 22-30% at sites in the east and south. The depot at High
Mowthorpe on the Yorkshire Wolds had its first germination (1%) last
week, but no further germination took place in drying conditions this
week.
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Sclerotinia Monitoring Bulletin 54 (86.17 KB)
Published Date: Wednesday 14th May 2008
Most crops are at the late-flowering stage and most pods are set on the
main racemes. Forward crops have finished flowering. Late crops and
pigeon damaged areas are likely to continue flowering for time as more
branches are produced. Some petal sticking has been reported, but
recent hot dry weather has resulted in large numbers of petals settling
on the ground. Rain is forecast from 15 May onwards and this may
provide the last conditions for petal sticking and infection before the
end of flowering. As the sclerotinia risk is still present, a second
fungicide treatment may be worthwhile to maintain protection at high
risk sites until the end of flowering. Sclerotinia germination has
increased slightly at all sites in southern, eastern and westem England
and soils have become dry at the surface. The highest germination is at
ADAS Rosemaund where there has now been 46% germination, an increase of
13% since last week. There was 1% new germination at Boxworth, Cambs,
1% at the Kent site on Romney Marsh and 3% at ADAS Terrington, giving
rather similar total germination of 16-22% at sites in the east and
south. The depot at High Mowthorpe on the Yorkshire Wolds has shown its
first germination (1%) this week. The older apothecia have shrivelled
this week, but could soon be producing spores again if it rains.
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Sclerotinia Monitoring Bulletin 53 (85.61 KB)
Published Date: Wednesday 7th May 2008
Most crops are flowering strongly and moving from mid to late-flowering
and setting pods. Forward crops have almost finished flowering on the
main raceme. Some late crops and pigeon damaged areas are still green
and between the yellow bud and early flowering stages. Some petal
sticking has been reported, though generally in low numbers as heavy
rain tended to wash petals off the foliage and hence reduce the
sclerotinia risk. As the sclerotinia risk is still increasing, a second
fungicide treatment may be worthwhile to maintain protection at high
risk sites until the end of flowering. Sclerotinia germination has
increased at all sites in southern, eastern and westem England as soils
have been moist. The highest germination is at ADAS Rosemaund where
there has now been 33% germination, an increase of 9% since last week.
There was 11% new germination at Boxworth, Cambs, 6% at the Kent site
on Romney Marsh and 10% at ADAS Terrington, giving rather similar total
germination of 15-19% at sites in the east and south. Only the depot at
High Mowthorpe on the Yorkshire Wolds still has no germination. The new
apothecia are still expanding and will be producing spores in
increasing numbers. Several dry days are likely to favour dispersal of
air-borne sclerotinia spores so the risks of infection are expected to
increase if the weather becomes showery and leads to petal sticking
during the next week.
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Sclerotinia Monitoring Bulletin 52 (85.44 KB)
Published Date: Wednesday 30th April 2008
After warm dry weather at the end of last week, most crops are
flowering strongly and moving from early to mid-flowering. Some late
crops and pigeon damaged areas are still green and between the yellow
bud and early flowering stages. Forward crops are beyond the
mid-flowering stage with pods developing. Progress was made with
sclerotinia fungicide applications last week, but rain is hampering
spraying this week. Fortunately some of this rain has been heavy so it
may have washed petals off the foliage and reduced the sclerotinia
risk. There is some urgency to protect untreated crops that are
flowering against sclerotinia.
Sclerotinia germination has increased quite dramatically from 5% to 24%
at ADAS Rosemaund this week. There was 4-6% new germination at
Boxworth, Cambs, the Kent site on Romney Marsh and at ADAS Terrington.
There was more rain in the Rosemaund area last week so soils have been
moist at the surface, but germination could now increase quickly in
other regions after more widespread rain this week. Only the depot at
High Mowthorpe on the Yorkshire Wolds still has no germination.
Apothecia have also been found in winter wheat after winter oilseed
rape with sclerotinia in 2007 in The Thames valley area. It is now a
good time to look for apothecia in winter cereal crops where you know
there have been sclerotinia problems in previous years. Sclerotinia
spores are likely to be able to spread from infested cereal fields to
nearby oilseed rape crops. Finding apothecia nearby would justify
fungicide treatment on oilseed rape.
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Sclerotinia Monitoring Bulletin 51 (85.33 KB)
Published Date: Wednesday 23rd April 2008
There has been limited crop development during the last week and growth
stages are still mainly between the yellow bud and early flowering
stages. Some forward crops are at the mid-flowering stage with a few
small pods. Flowering is more advanced in some varieties such as
Excalibur. Severe pigeon damage is now very conspicuous and
contributing the large variation within crops. Some sclerotinia
fungicides have been applied at early flowering and many crops are
likely to require treatment during the next 10 days. Sclerotinia
germination has started this week at ADAS Terrington. Four out of the 5
depots are now showing germination, which leaves only the
traditionallly late site at High Mowthorpe on the Yorkshire Wolds with
no activity in the depot. At Boxworth, Cambs, Rosemaund, near Hereford
and the Kent site on Romney Marsh, there are low numbers of apothecia
present this week. Apothecia have also been found in winter wheat after
winter oilseed rape with sclerotinia in 2007 in The Thames valley area.
It is now a good time to look for apothecia in winter cereal crops
where you know there have been sclerotinia problems in previous years.
Sclerotinia spores are likely to be able to spread from infested cereal
fields to nearby oilseed rape crops. Finding apothecia nearby would
justify fungicide treatment on oilseed rape. The first petal tests are
now starting to be completed. They indicate that sclerotinia ascospores
have been produced for at least three weeks and some crops are already
risk despite low germination in depots. Crops in the Boxworth, Hereford
and Romney Marsh areas have been tested for the first time during 2-15
April as first plants started to flower. Sclerotinia has been found at
all the sites tested so far, mainly at low levels of 2.5-20% petals
affected. However, at high risk sites in the Hereford area, interim
results suggest higher levels of sclerotinia (35-65% petals affected)
are present and fungicide treatment is now required. In other areas, it
is likely that some crops may have 25% or more petals affected and
justify treatment. At some sites, in previous years, 25% petal
infection has resulted significant sclerotinia stem infection in crops
and this is suggested as a guiding threshold. The sclerotinia risk is
likely to keep increasing soil temperatures rise. Crops are early to
mid-flowering should be treated where there is considered to be a
sclerotinia risk. Fungicides give about 3 weeks protection and a second
fungicide treatment may justified this season at high risk sites
because of high crop value.
Rain during 23-24 April may be able to provide suitable conditions for
some early leaf and stem infection by sclerotinia. If this occurs, some
stem symptoms should be evident by mid-May.
Light leaf spot is present on the upper leaves and occasionally on
stems, particularly in the north and west. It will now be difficult to
control but protection of pods against light leaf spot should be part
of decision making on products at PGR and sclerotinia timing.
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Sclerotinia Monitoring Bulletin 50 (83.22 KB)
Published Date: Wednesday 16th April 2008
Crops have developed slowly during the last week and are still mainly
between the yellow bud and early flowering stages. Some forward crops
are close to the mid-flowering stage. The percentage of plants starting
to flower is very variable and at least 50% plants should have flowers
before the crop is considered at the early flowering growth stage.
Where there is pigeon damage in significant parts of the field, the
damaged areas should treated as a different crop for fertiliser and
pesticide treatment. Sclerotinia germination has started this week at
both ADAS Boxworth and at the Kent site on Romney Marsh. Apothecia
recorded at ADAS Rosemaund last week have disappeared. No germination
has occurred so far at the other two sites. The first petal test has
been completed on a crop in the Boxworth area and it showed 12.5%
petals with sclerotinia. This indicates that sclerotinia spores have
been produced for at least two weeks and some crops are already risk
despite low germination in depots. (At some sites previously, 25% petal
infection has resulted significant sclerotinia infection in crops.) The
sclerotinia risk is likely to keep increasing soil temperatures rise.
Crops are early to mid-flowering should be treated where there is
considered to be a sclerotinia risk. Fungicides give about 3 weeks
protection and a second fungicide treatment may justified this season
at high risk sites because of high crop value.
Light leaf spot is present at high levels in some crops in all regions
and is most prevalent in the north and west. It will now be difficult
to control but should be part of decision making on products at PGR and sclerotinia timings.
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Sclerotinia Monitoring Bulletin 49 (82.28 KB)
Published Date: Wednesday 9th April 2008
Crops are mainly between the yellow bud stage and early flowering
stages with some crops in the north and late crops in other regions
still at the mid-stem extension stage. The percentage of plants
starting to flower is very variable and at least 50% plants should have
flowers before the crop is considered at the early flowering growth
stage. Pigeon damage is severe in many fields or parts of fields and
decisions should be made about whether to treat these areas as
different crops for fertiliser and pesticide treatment. Light leaf spot
is present at high levels in some crops in all regions and is most
prevalent in the north and west. It will now be difficult to control
but should be part of decision making on products at PGR and
sclerotinia timings. A threshold of 15-20% plants with light leaf spot
is suggested this year because of the increased value of rapeseed.
Phoma leaf spot is common and the first stem cankers can be found. No
treatment is advised at this stage.
Sclerotinia germination has re-started at ADAS Rosemaund this week with
3% new germination. No germination has occurred so far at the other 4
sites. Soils are moist on the surface in many areas and sclerotinia
activity should increase as soil temperatures rise. At present the
sclerotinia risk is low. There is no need to rush to spray crops as
sclerotinia risk is likely to increase later in April and into May and
fungicides give only about 3 weeks protection.
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Sclerotinia Monitoring Bulletin 48 (23.00 KB)
Published Date: Friday 21st March 2008
Crops are growing strongly after early nitrogen treatment and forward
crops are close to the mid stem extension stage (30-50cm tall), with a
low percentage of taller plants starting to flower. A few forward crops
are ready for PGR treatment.
Light leaf spot is present in the north and west particularly where a
winter spray was missed. It should be tackled early, by start of stem
extension, with a non-PGR triazole at a threshold of 15-20% plants.
(This is a lower threshold than last year because of the increased
value of rapeseed). The threshold increases at later growth stages due
to lower yield loss - 25% at mid-stem extension and 30% at yellow bud.
Phoma leaf spot is common but it is too late to achieve good control of
stem canker.
Sclerotinia germination has started early this season with the first
occurrence at ADAS Rosemaund last week. No new germination has occurred
this week and at present the sclerotinia risk is low. Soils are moist
on the surface in many areas and sclerotinia activity should increase
as soil temperatures rise.
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BASF/ADAS Sclerotinia Monitoring Bulletin 14/03/08 (31.06 KB)
Published Date: Friday 14th March 2008
Crops are growing strongly after early nitrogen treatment and forward
crops are close to the mid stem extension stage (30-50cm tall), with a
low percentage of taller plants starting to
flower. A few forward crops are ready for PGR treatment. Where crops
were established late in the autumn, small plants are making only weak
growth. There is continuing pigeon damage and this needs urgent
attention or some crops will not recover. Light leaf spot is
producing new lesions at the moment and is still an underestimated
threat - capable of causing yield losses of up to 1.0 t/ha. Prompt
action is required to control light leaf spot where crops have 15-20%
plants affected. (This is a lower threshold than last year because
the increased value of rapeseed).
Sclerotinia germination has started early this season and the first
occurrence has been at ADAS Rosemaund this week. There have been
occasional reports of sclerotinia activity on leaves during the winter.
Look for plants where leaves are rotting and showing white immature
sclerotia and some black sclerotia.
At present the sclerotinia risk is low. Soils are moist on the surface
in many areas and sclerotinia activity should increase as soil
temperatures rise.
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BASF/ADAS Sclerotinia Monitoring Bulletin 25/05/07 (114.18 KB)
Published Date: Tuesday 5th June 2007
Sharp increase in Sclerotia germination - risk to late flowering winter
crops and spring rape crops. Continued unsettled weather will increase
the risk of Alternaria and secondary spread of Sclerotinia particularly
in crops at risk of lodging.
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BASF/ADAS Sclerotinia Monitoring Bulletin 15/05/07 (112.13 KB)
Published Date: Wednesday 16th May 2007
For crops at the end of flowering, the Sclerotinia risk is much
reduced. Sclerotinia could still be infecting some crops that are at
the late flowering stage, particularly since cooler temperatures may
prolong flowering. The risks of Alternaria will increase if showery
weather continues and lodged crops may justify a late fungicide spray.
Some Sclerotinia stem rot is evident in the West Midlands and Hereford
area where rainfall enabled infection to take place in mid to late
April. Powdery Mildew is now increasing rapidly. Stem canker symptoms
have become much more common recently and high levels are present
already on untreated susceptible varieties.
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BASF/ADAS Sclerotinia Monitoring Bulletin 27/04/07 (111.10 KB)
Published Date: Tuesday 1st May 2007
Crops are now at mid- to late flowering, with many pods present. Final
decisions are required as flowering will be almost complete in 2-3
weeks time with its duration dependent on the extent of flowering on
branches. Some crops should reach the end of flowering in 1-2 weeks
time. Crop height is variable and mainly in the range 120-180 cm tall.
There is uneven growth and vigour in many crops with poorer areas often
showing a blotchy or mottled leaf colour.
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BASF/ADAS Sclerotinia Monitoring Bulletin 20/04/07 (109.57 KB)
Published Date: Friday 20th April 2007
Many crops are at the mid-flowering stage, with some pods present.
Forward crops and early flowering varieties are at the late flowering
stage on the main raceme. The duration of flowering will depend on the
extent of flowering on branches. Some crops should reach the end of
flowering in 2-3 weeks time. There is uneven growth and development in
many crops, the poorer areas have been showing much less flower during
the last week.
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BASF/ADAS Sclerotinia Monitoring Bulletin 13/04/07 (105.98 KB)
Published Date: Friday 13th April 2007
Many crops are overall yellow, with plants mostly at early flowering. A
few forward crops are at mid flowering and have pods can be seen on the
main raceme. Backward crops are still green, but will soon be
flowering.
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BASF/ADAS Sclerotinia Monitoring Bulletin 06/04/07 (99.33 KB)
Published Date: Friday 6th April 2007
Cool and generally dry conditions have resulted in uneven plant
development in many crops. Many crops have flowering plants and some
fields are overall yellow, but this masks a high proportion of shorter
plants that are approaching the yellow bud stage. Crops will change
quickly as they take up nitrogen.
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BASF/ADAS Sclerotinia Monitoring Bulletin 30/03/07 (36.10 KB)
Published Date: Friday 30th March 2007
Crop development has continued steadily during the last week despite
cold nights. Most crops range from mid-stem extension stage (40-60cm
tall) to the yellow bud stage (GS 3,3-3,7) with a low percentage of
taller plants starting to flower. A few forward crops are flowering (GS
4,1). There are still some nitrogen and some plant growth regulator
(PGR) treatments to be applied. Crops will change quickly as they take
up nitrogen and decisions with PGR treatments may need to be made when
this occurs.
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BASF/ADAS Sclerotinia Monitoring Bulletin 23/03/07 (97.79 KB)
Published Date: Friday 23rd March 2007
Crop development has continued despite frosts and snow showers. Most
crops range from mid stem extension stage (30-50cm tall) to the yellow
bud stage, with a low percentage of taller plants starting to flower.
Ground conditions have improved allowing nitrogen and some canopy
management treatments to be applied. Crops will change quickly as they
take up nitrogen and decisions with canopy management treatments may
need to be made when this occurs.
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BASF/ADAS Sclerotinia Monitoring Bulletin 16/03/07 (95.23 KB)
Published Date: Friday 16th March 2007
Crops are more advanced than usual this year, and about four weeks
ahead of last year. Many crops are close to the mid stem extension
stage (30-50cm tall) with a low percentage of taller plants starting to
flower. A few forward crops have been flowering for more than a week.
Ground conditions have been very wet and this has prevented
applications of fertiliser and crop protection products to crops. Drier
weather last week has enabled some nitrogen to be applied and the next
decision will be canopy management treatments.
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Sclerotinia Bulletin 17/5/2006 (41.49 KB)
Published Date: Wednesday 17th May 2006
High disease pressure now.
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Sclerotinia Bulletin 12/5/2006 (40.33 KB)
Published Date: Friday 12th May 2006
Further Sclerotia germination - Higher risk situation now.
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Sclerotinia Bulletin 5/5/2006 Cleared (38.86 KB)
Published Date: Friday 5th May 2006
Significant increase in sclerotia germination.
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Sclerotinia Bulletin 28/4/2006 Cleared (38.20 KB)
Published Date: Friday 28th April 2006
Significant increase in sclerotia germination over the last week. Apply fungicides from next week onwards.
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Sclerotinia Bulletin 21/4/2006 Cleared (39.48 KB)
Published Date: Friday 21st April 2006
Sclerotia germination is increasing Canopy management treatments should be completed.
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Sclerotinia Bulletin 6/4/2006 Cleared (28.96 KB)
Published Date: Thursday 6th April 2006
First Sclerotia have germinated Canopy management timing is NOW.
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Sclerotinia Bulletin 6/4/2006 Cleared (28.96 KB)
Published Date: Friday 31st March 2006
Strong plant growth in warmer conditions – Canopy management timing is rapidly approaching.
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Sclerotinia Bulletin 17/3/2005 (36.75 KB)
Published Date: Friday 17th March 2006
Winter oilseed rape crops are starting to produce some new leaf growth and crops are close to the early stem extension stage. Some internodes are present where stem elongation took place in the autumn, occasional crops have plants that flowered in late autumn.