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Bees: Pesticide restrictions must be extended to wheat - new Friends of the Earth report
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<blockquote data-quote="Brisel" data-source="post: 3349346" data-attributes="member: 166"><p>I'll play Devil's advocate here. A seed dressing IS Integrated Pest Management. <em>In the event of no active ingredient escape/collateral damage* </em>then non target species will not be affected. Only those attacking the treated plants will get a dose of the chemical. This is an alternative to reactive broad spectrum boom application of pyrethroid insecticides that kill many more insects other than the BYDVirus carrying aphids.</p><p></p><p>The likelihood of virus carrying aphids infecting a late September sown wheat crop in the South West of England is 80-95%. On those odds it is not uncommon for growers to choose an insecticide seed treatment to prevent infection. Crop losses from BYDV can vary from 10% to 100%. In the mild autumn of 2015 I saw hundreds of hectares of crops written off that were not treated. I have 11km of beetle banks in my fields - whilst these are handy for summer aphid control the movement of winged aphids during the autumn means that this has no effect on aphid numbers from September - November. In addition to this, kdr (knock down resistance) to pyrethroids has now been found in grain aphids. This also points grower decisions towards Deter seed dressing.</p><p></p><p>If anyone can suggest an alternative to foliar spraying I would of course be very interested. Leaving crops untreated is not going to preserve my farm's income as infection is guaranteed, though I won't know how badly until it is too late. </p><p></p><p>As I move away from cultivation to strip tillage then eventually no till I am using cover crops which only serve to act as a bigger reservoir and "green bridge" for virus carrying aphids. I'd like to stop using insecticides to increase natural predators but we don't get the cure without the problem to begin with. Whilst the predator numbers are lower, the pest moves in, infects the crop then the predator numbers increase until the pest population crashes, then the cycle begins again.</p><p></p><p>[ATTACH=full]454140[/ATTACH]</p><p>* I'm sure you'll see this and have a suitable reply <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite2" alt=";)" title="Wink ;)" loading="lazy" data-shortname=";)" /></p></blockquote><p></p>
[QUOTE="Brisel, post: 3349346, member: 166"] I'll play Devil's advocate here. A seed dressing IS Integrated Pest Management. [I]In the event of no active ingredient escape/collateral damage* [/I]then non target species will not be affected. Only those attacking the treated plants will get a dose of the chemical. This is an alternative to reactive broad spectrum boom application of pyrethroid insecticides that kill many more insects other than the BYDVirus carrying aphids. The likelihood of virus carrying aphids infecting a late September sown wheat crop in the South West of England is 80-95%. On those odds it is not uncommon for growers to choose an insecticide seed treatment to prevent infection. Crop losses from BYDV can vary from 10% to 100%. In the mild autumn of 2015 I saw hundreds of hectares of crops written off that were not treated. I have 11km of beetle banks in my fields - whilst these are handy for summer aphid control the movement of winged aphids during the autumn means that this has no effect on aphid numbers from September - November. In addition to this, kdr (knock down resistance) to pyrethroids has now been found in grain aphids. This also points grower decisions towards Deter seed dressing. If anyone can suggest an alternative to foliar spraying I would of course be very interested. Leaving crops untreated is not going to preserve my farm's income as infection is guaranteed, though I won't know how badly until it is too late. As I move away from cultivation to strip tillage then eventually no till I am using cover crops which only serve to act as a bigger reservoir and "green bridge" for virus carrying aphids. I'd like to stop using insecticides to increase natural predators but we don't get the cure without the problem to begin with. Whilst the predator numbers are lower, the pest moves in, infects the crop then the predator numbers increase until the pest population crashes, then the cycle begins again. [ATTACH=full]454140[/ATTACH] * I'm sure you'll see this and have a suitable reply ;) [/QUOTE]
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Bees: Pesticide restrictions must be extended to wheat - new Friends of the Earth report
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