RAPID ACCESS TO THE LATEST REGIONAL CROP PEST AND DISEASE LEVELS
Crop Report: 27 April 2007
Report compiled by Farming Online from reports
received from members of the Association of Independent Crop Consultants
Pest Alert - South East. Mealy Aphids in Winter Oilseed rape, foci right across some fields,
high numbers, and very early to arrive. Threshold is 13% of plants infested. Disease Alert - Brown and Yellow rust widespread. Yellow rust in crops of Robigus in Eastern Counties.
Brown rust in Alchemy and Solstice in South and East.
Crop development - Are wheat crops bolting? Some rain for some at the beginning of the week has dissipated with the drying winds and a return to warm, dry conditions are causing autumn sown wheat crops to race through their growth stages. There is concern that the heat and lack of rain may be causing them to bolt rather than develop naturally. Spikelet counts are so far normal in September sown crops, being in the mid twenties. But tiller numbers are down. Grain set and weight will be an important component of yield this year. Keeping crops going for the next three months is the challenge.
Winter barley crops are suffering the same fate but have less time to go. Whilst, winter oats are only just beginning to wake up with very little growth throughout April. Winter rape is coming to the end of flowering and setting pods and appears to have suffered the least from the dry April.
See also www.leaf-emergence.co.uk
to compare winter wheat variety development by sowing date and site.