RAPID ACCESS TO THE LATEST REGIONAL CROP PEST AND DISEASE LEVELS
Regional Crop Report East Midlands, 04 May 2007
Winter Wheat
Comment on current growth stages
Field conditions
Crops
very variable, from GS 32-3 up to GS 39. While most forward crops
at T2, will delay spraying as T1 only 2-3 weeks ago. Second part of
nitrogen main split now going on but winds are causing problems re
spreading. Main problem is with bread wheat - how much N to top up
for protein considering N still to be taken up. Will take tissue analysis
for N after rain (if any!) - tissue analysis now would give a misleading
result due to dry weather. Some forward and thick crops will have
PGR imminently but many crops even where thick are short, particularly
where PGR used at T1.
Continued
dry weather is resulting in plant tiller numbers reducing down to
one in driest conditions. Most extreme plants 'bolting'. However,
on best soils crops still look good. Ground now very hard and dry
- clay soils cracked. Spraying conditions good. Nil rain this week.
Main
diseases Present
Level
and comment
Brown
Rust
Not
a problem so far.
Mildew
Levels
very low.
Septoria
tritici
Some
on leaf 5 but leaf four upwards very clean.
Yellow
Rust
Only
present in Robigus but controlled by fungicides.
Eyespot
Very
little seen.
Other
Main
Pest problems
Level
and comment
Aphids
None
seen
Frit
fly
None
seen
Leatherjacket
None
seen
Opomyza
None
seen
Slugs
Slugs
grazing top leaves but not damaging. A lot of slime trails about in
spite of the dry.
Wheat
bulb fly
None
seen
Wireworm
None
seen
Other
Main
weed problems
Level
and comment
Blackgrass
No
further treatment.
Meadow
grasses
No
further treatment.
Rye
grass
No
further treatment.
Bromes
No
further treatment.
Cleavers
Apart
from one or two crops many have low levels, which will be mopped up
at T2.
Tiller
abortion as with wheat. Backward crops at GS 37/39 - many with awns.
Continued
dry weather is resulting in plant tiller numbers reducing down to
one in driest conditions. Most extreme plants 'bolting'. However,
on best soils crops still look good. Ground now very hard and dry
- clay soils cracked. Spraying conditions good. Nil rain this week.
Main
diseases Present
Level
and comment
Brown
Rust
None
seen
Mildew
No
new pustules.
Net-blotch
New
growth remains clean
Yellow
Rust
None
seen
Eyespot
None
seen
Rhynchosporium
Veery
low levels.
Other
BYDV
patches starting to appear in early sown crops that had only one autumn
aphicide.
Flowering
well forward as main racemes come to end of flowering. Many fields
showing a definite "greening" as flowering enters final
stages. Leaf bulk still below average on most crops. Slow uptake of
N. Poor N uptake obvious in several crops - lighter canopies than
normal. Castille and Astrid very short.
Continued
dry weather is resulting in plant tiller numbers reducing down to
one in driest conditions. Most extreme plants 'bolting'. However,
on best soils crops still look good. Ground now very hard and dry
- clay soils cracked. Spraying conditions good. Nil rain this week.
Main
diseases Present
Level
and comment
Club
root
No
further reports.
Downy
Mildew
No
longer of concern.
Light
Leaf Spot
None
seen
Phoma
None
seen
Powdery
Mildew
None
seen
White
Leaf Spot
None
seen
Other
None
seen
Main
Pest problems
Level
and comment
Aphids
None
seen
Flea
beetle
None
seen
Leatherjacket
None
seen
Slugs
None
seen
Other
Mealy aphids numbers remain low. Seed weevil numbers also
low and below threshold with only odd ones found on headlands.
All risk predictions published by CropMonitor are provided in good faith and are NOT a substitute for
rigorous fieldwalking in combination with advice from BASIS qualified persons. CropMonitor accepts no liability
for crop loss or damage resulting from the use of CropMonitor.
