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O.S.R. pollen beetle 2019
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<blockquote data-quote="Woodlander" data-source="post: 6104804" data-attributes="member: 1516"><p>You are correct. I'm finding large numbers of pollen beetle this year, and they have arrived a little earlier when many crops are at the susceptible stage </p><p></p><p>I really don't like applying insecticides, especially in the spring, but I certainly wouldn't rule anything out. Crops are extremely variable, both between growers, between fields and within fields so it really needs looking at on a case by case basis, no general advice can be given. Take a look at the AHDB threshold and you'll see that the crop can tolerate very high numbers of pollen beetle. </p><p></p><p>BUT... ... Crops this year are not 'normal' crops! The threshold would suggest that a low plant population can tolerate more beetles per plant, as the plant will branch more. Will these CSFB hit crops really branch that well. I believe the threshold falls short on these backward, pest ravaged crops. </p><p></p><p>I remember a part field, around 10 years ago which didn't start to flower. It was pigeon damaged next to a spinney. 3/4 of the field was flowering beautifully, but the pollen beetle number were massive on the grazed area preventing any flowering. Without an application of insecticide it may never have flowered, and yield would be negligible. The insecticide meant that part of the field did eventually flower, albeit yield was lower.</p><p></p><p>My guess is that some fields will justify treatment this year, others not. Look at things on a field by field basis and don't take general advice from people on here who haven't seen the crop or are hundreds of miles away!</p></blockquote><p></p>
[QUOTE="Woodlander, post: 6104804, member: 1516"] You are correct. I'm finding large numbers of pollen beetle this year, and they have arrived a little earlier when many crops are at the susceptible stage I really don't like applying insecticides, especially in the spring, but I certainly wouldn't rule anything out. Crops are extremely variable, both between growers, between fields and within fields so it really needs looking at on a case by case basis, no general advice can be given. Take a look at the AHDB threshold and you'll see that the crop can tolerate very high numbers of pollen beetle. BUT... ... Crops this year are not 'normal' crops! The threshold would suggest that a low plant population can tolerate more beetles per plant, as the plant will branch more. Will these CSFB hit crops really branch that well. I believe the threshold falls short on these backward, pest ravaged crops. I remember a part field, around 10 years ago which didn't start to flower. It was pigeon damaged next to a spinney. 3/4 of the field was flowering beautifully, but the pollen beetle number were massive on the grazed area preventing any flowering. Without an application of insecticide it may never have flowered, and yield would be negligible. The insecticide meant that part of the field did eventually flower, albeit yield was lower. My guess is that some fields will justify treatment this year, others not. Look at things on a field by field basis and don't take general advice from people on here who haven't seen the crop or are hundreds of miles away! [/QUOTE]
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O.S.R. pollen beetle 2019
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