RAPID ACCESS TO THE LATEST REGIONAL CROP PEST AND DISEASE LEVELS
Regional Crop Report North East, 20 April 2007
Winter Wheat
Comment on current growth stages
Field conditions
Forward crops now at GS32-33 and looking good. Most later sown 2nd
and continuous also OK, but some where seedbed compacted or on very
heavy soils which now have severe cracking due to current lack of
rainfall, need some rain to prevent significant loss of tillers.
Another 7 days of no rainfall and some fields are deeply cracked now
and have crops showing drought stress. The major areas of clay soils
though with good soil structure and well rooted crops are looking
fine.
Main
diseases Present
Level
and comment
Brown
Rust
Lower
level now, but can find on susceptible varieties such as Alchemy.
Mildew
As
with Brown rust it has mostly disappeared now after early attack.
Septoria
tritici
Present
in all crops with all susceptible varieties showing significant level,
but not any worse over last 7 days. Included chlorothalonil with PGR
. Robust T1 will be applied towards end of April.
Yellow
Rust
A
lot of crops infected with Yellow rust but, despite appearance of
dead areas on leaves it has been well controlled by the earlier cyproconazole
application.
Eyespot
Some
stem discolouration easy to find in most early sown crops. Some stem
penetration reported in area and expect to apply some robust control
at T1.
Other
None
seen
Main
Pest problems
Level
and comment
Aphids
None
seen
Frit
fly
None
seen
Leatherjacket
None
seen
Opomyza
None
seen
Slugs
None
seen
Wheat
bulb fly
None
seen
Wireworm
None
seen
Other
Gout
Fly - moderate
levels can be found in all crops sown before the end of September.
Most
crops at GS32-33. A few have flag leaf emerging. Very dry now. Crops
taking up N but some rainfall would help. Many crops looking drought
stressed so will omit PGR application. Others on very fit fields
had lots of organic manure will continue with PGR as flag
leaf emerging upto and including awns just visible.
Another 7 days of no rainfall and some fields are deeply cracked now
and have crops showing drought stress. The major areas of clay soils
though with good soil structure and well rooted crops are looking
fine.
Main
diseases Present
Level
and comment
Brown
Rust
None
seen
Mildew
Much
lower level now following long dry spell and appearance of new growth.
Net-blotch
Significant
level in Carat and Pict, but Saffron only very low level.
Yellow
Rust
None
seen
Eyespot
None
seen
Rhynchosporium
None
seen
Other
None
seen
Main
Pest problems
Level
and comment
Aphids
None
seen
Leatherjacket
None
seen
Slugs
No
damage noticed this week.
Wireworm
None
seen
Other
None
seen
Main
weed problems
Level
and comment
Blackgrass
As
expected have problem areas in some fields with patches blackgrass
coming through.
Flowering
has progressed very quickly. Most crops now have 10 - 15 pods set
on the main stem and are in full flower. Later crops such as where
pigeon damaged or have compacted seedbeds also into flower now but
only just setting first pods.
Main
diseases Present
Level
and comment
Club
root
None
seen
Downy
Mildew
None
seen
Light
Leaf Spot
Some
signs of new infection.
Phoma
No
reinfection seen.
Powdery
Mildew
None
seen
White
Leaf Spot
None
seen
Other
Sclerotinia: this is a high-risk area due to short rotation
and very high acreage of rape over may years. Despite dry conditions
will apply fungicide when 10 - 20 pods set on main stem, say in 10
- 14 days.
Main
Pest problems
Level
and comment
Aphids
None
seen
Flea
beetle
No
larvae been found.
Leatherjacket
None
seen
Slugs
None
seen
Other
Seed
Weevil: found above threshold levels in some crops so bets to
assume numbers will rise over next few days.
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.
