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market-farming - Re: [Market-farming] Broccoli and Cauliflower questions

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  • From: Bill Shoemaker <wshoemak AT illinois.edu>
  • To: "Market Farming" <market-farming AT lists.ibiblio.org>
  • Subject: Re: [Market-farming] Broccoli and Cauliflower questions
  • Date: Fri, 6 Nov 2009 08:42:26 -0600 (CST)

>Next spring I will spray with Bt. It just doesn't seem
>smart to spray it now. I will deal with any loopers, after >I drown them!

That's one weakness of Bt. It doesn't work well on older larvae. It will kill
early instars but older instars will survive. So its best use is to prevent
infestations rather than rescue them.

Bill


William H Shoemaker, UI-Crop Sciences
Sr Research Specialist, Food Crops
St Charles Horticulture Research Center
535 Randall Road St Charles, IL 60174
630-584-7254; FAX-584-4610




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