A week of welcome spring weather has seen migration pick up. But we are still not quite half way through migration and many crops have yet to grow through the damage susceptible phase, reports Bayer CropScience.
The picture across the country generally is of migration being a quarter to a third complete. The met stations in Sussex and Kent, which were the first to show migration getting underway this season, are showing migration 45% complete. And the met stations in Norfolk and Suffolk, which were the last to show migration underway, are showing just 8% complete.
Rothamsted Researchs Dr Sam Cook says; If conditions continue fine and spring-like, there could be significant migration into crops over the coming week. Growers with crops still growing through the damage susceptible phase would therefore be well-advised to keep a daily watch on the new migration map.
When your nearest met station has been yellow (good migration conditions) for three consecutive days and many have been over the last week or red (optimum migration conditions) for just one day, its the prompt to get into crops and assess average numbers of beetles per plant against thresholds.
Access pollenbeetle predictor at: www.bayercropscience.co.uk/pollenbeetlepredictor