I have 80-110 per plant. In some cases more. I had the same pressure two years ago. Agro was v relaxed and said don’t treat but I did as they were literally wiping my crop out. Neighbours who waited had masses of potential wiped out. Have sprayed a tankful this evening just before dark to limit damage. You can’t get away without insecticides with osr here, no matter how much I wish I could. There was no damage yday morning. This morning it is obvious, and in this cold spell coming it’ll just sit there getting hammered.
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Insyst 200g/haWhich insecticide did you use?
You’ll not be far away in Lincolnshire? What’s the pressure like there?Which insecticide did you use?
Has anybody got any trials data on spraying/not spraying for pollen beetles? We haven’t sprayed here before, hoping that the plant produces more flowers to compensate for the aborted ones due to pollen beetle damage, is this just wishful thinking?
You’ll not be far away in Lincolnshire? What’s the pressure like there?
TLDR. However their conclusion (in the abstract and summary) that spring rape is as susceptible as winter rape, misses the point. Beetles come in to winter crops just before flowering so there is a short window of potential damage. When they appear however spring rape is much smaller, and they can be found looking for flower buds in these crops well before stem extension. Hence a much longer window of feeding and damage.
Seriously? Someone has recommended you spend £30/ha on pollen beetle? Is this right or a typo?!Anyone used Steward (Indoxacarb)? Been recommended but will be £30/ha.