Its been another week of conditions not suiting pollen beetle migrationand with just two days of March left its now looking like a decidedly lateseason for them, says Bayer CropScience.
The migration start map has been in stasis this week with almost halfthe met stations red as they were a week ago. The map shows a clear patternwith two areas where migration has begun. There is one swathe from the south eastcorner of Wales running up through the midlands to Yorkshire and Lincolnshireand a second running east/west across the southern counties.
The percentmigration map shows some movement in the southern swathe with migrationprogressing to 10 to 15 percent over the last week. In the Wales to Yorkshireswathe though migration has been negligible edging up to just four to eightpercent.
With thismornings BBC weather forecasting another week of maximum temperatures belowten centigrade across much of the country and only reaching the low teens in afew places were unlikely to see significant migration before Easter. Althoughcrop growth has been slowed by the cool spring conditions so far it has stillbeen noticeable and most have now reached the start of the damage susceptiblephase marked by green bud GS51.
Access pollenbeetle predictor at: www.bayercropscience.co.uk/pollenbeetlepredictor