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>>> Sadly this is a global phenomenon. We are now very sophisticated wit Without wishing in any way to distract us from discussion of the consequences of spraying Btk, I wonder if there is more than one significant mechanism affecting butterfly numbers this summer. It was a very dry summer in many parts of the province. Is there any connection between amount of rainfall and the success of larval and pupal life-stages? It does seem that after a decent rain we get a flush of Cabbage butterflies, almost as if they have been waiting as pupae for some moisture to help them complete their development and emerge as adults. Does anyone have any knowledge about the effect on lep pupae of rainfall? Does it affect emergence rates somehow? Peter Payzant On 2016-08-27 9:53 PM, Bev Wigney wrote: > Last night, I did find a couple of references to Bt killing of non-target insects, and Leps in particular.
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