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nafex - Re: [NAFEX] PC survival in apples and a question about Assail

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  • From: Steve <sdw12986@aol.com>
  • To: North American Fruit Explorers <nafex@lists.ibiblio.org>
  • Subject: Re: [NAFEX] PC survival in apples and a question about Assail
  • Date: Tue, 10 Feb 2009 22:30:17 -0500


That makes sense. As I think more and more about what I see in my apples, I'm starting to doubt the idea that apples grow and crush the curculio larva. It seems to me that if the larva penetrated into the apple and then got crushed, there would have to be at least a tiny dead area under the scar. I don't remember that. It seems to me that the curculio scars are truly only skin deep. (I'll pay more attention to that in the future.)
Perhaps when we see mature apples with those scars, it's because either there was no egg, or the egg failed to hatch, or something happened to the larva before it could penetrate the fruit. (That something could be the weather, a predator, or the spray we used.) Perhaps the apples that had successful larval development all fell to the ground when they were small.

Steve in the Adirondacks

Mark Angermayer wrote:
We don't seem to have a lot of curculio here, but everything I've read
indicates it can reproduce in apples. It emits a substance (maybe
ethylene?) that tricks the tree into dropping the fruit.

Mark
KS




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