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Regional Crop Report South West,   27 April 2007
Winter Wheat
Comment on current growth stages Field conditions
Crops breaking all records for leaf emergence. Flag leaf tip (GS 37) is common in September sowings of Alchemy, Einstein, Mallaca and Solstice and there are still 4 days left in April. This is about 1.5 leaves ahead of normal. Only Claire seems to be behaving like a late developing wheat although leaf 2 can still be detected in early sowings. Even Humber seed crops, which is claimed to be a slow developer, are racing on. A late frost as in 1992, which destroyed Soissons ears could be very serious, especially if coinciding with hot tank mixes, so be careful. Very dry we have still had only small amounts of rain.
Main diseases Present Level and comment
Brown Rust Levels very high in Alchemy, where no T0 triazole was applied patches of yellow tipping not unlike yellow rust patches are obvious. This tipping and rust infection is confined to leaf 4 and 5. Most common in Alchemy, Zebedee and Claire but has been detected in Robigus. The rust epidemic has been favoured by high April temperatures and a profusion of susceptible hosts. The virulence of the Alchemy strain is alarming.
Mildew Levels still very low even on very susceptible varieties.
Septoria tritici Levels not increasing with all spring emerged leaves totally clear.
Yellow Rust Outbreaks in Robigus now contained.
Eyespot Except on very early drillings on heavy soils eyespot development has come to a halt with no further stem penetration.
Other None seen.
Main Pest problems Level and comment
Aphids None seen
Frit fly None seen
Leatherjacket No reports of further damage.
Opomyza None seen
Slugs None seen
Wheat bulb fly None seen
Wireworm None seen
Other None seen
Main weed problems Level and comment
Blackgrass No further reports.
Meadow grasses No further reports.
Rye grass No further reports.
Bromes  
Cleavers Emergence appears to be continuing
Others  

 
Regional Crop Report South West,  27 April 2007
Winter Barley
Comment on current growth stages Field conditions
Awns now emerging with ear half out on forward sites in South Somerset. Very dry we have still had only small amounts of rain.
Main diseases Present Level and comment
Brown Rust Low levels at stem base
Mildew At low levels in most varieties.
Net blotch At very low levels.
Yellow Rust None seen
Eyespot None seen
Rhynchosporium After worrying levels early this season progress has been slowed by the dry weather.
Other Brown rust: well controlled by T1 mixes.
Main Pest problems Level and comment
Aphids None seen
Leatherjacket None seen
Slugs None seen
Wireworm None seen
Other None seen
Main weed problems Level and comment
Blackgrass  
Meadow grasses
Rye grass
Bromes
Cleavers
Others

 
Regional Crop Report South West,  27 April 2007
Winter Oilseed Rape
Comment on current growth stages Field conditions
Petal fall well underway with little flower left on the main raceme of forward crops. Canopies are still very upright and open with excellent pod set.
  
Main diseases Present Level and comment
Club root No fresh reports.
Downy Mildew None seen
Light Leaf Spot Low levels have been seen although previously applied PGR triazoles should take care of this.
Phoma None seen
Powdery Mildew None seen
White Leaf Spot None seen
Other Sclerotinia minimal risk in current dry conditions.
Main Pest problems Level and comment
Aphids None seen
Flea beetle None seen
Leatherjacket None seen
Slugs None seen
Other Mealy aphid levels are very high for so early in the season.
Main weed problems Level and comment
Blackgrass None seen
Meadow grasses None seen
Rye grass None seen
Bromes None seen
Cleavers None seen
Others





Crop Report compiled by Farming Online from reports received by members from the Association of Independent Crop Consultants

 
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