Re: Killing Borers
- Subject: Re: Killing Borers
- From: P* M*
- Date: Wed, 20 Jun 2001 17:48:27 -0500
- List-Archive: <http://www.hort.net/lists/pumpkins/> (Web Archive)
Brad:
Thanks for the explanation. I assumed, of
course, that the restrictions on Warrior T were by reason of its potential
harmfulness.
You are correct that pyrethrum is a fantastic
natural pesticide. However, it affects all insects and is immediately
lethal (so it kills beneficials as well as the bad guys).
One of the positive things I recall about
pyrethrum, however, is that is decays in sunlight fairly rapidly, so there is no
residual insecticide in your garden. The drawback is that this would
mean that you would have to apply it often. Of course, if you hit the eggs
the first time, you would have no need to reapply (unless the SVB moths keep
coming. Usually they stop coming after a couple of weeks).
With nematodes, the nematodes actually live in the
moist enclosed confines of the vine, and will multiply in number if they
encounter a juicy SVB. I do not believe that they live for more than a
couple of weeks without food, so you don't want to inject them too early.
Last year I had some zucchini over to the side that showed SVB infestation, and
I injected my pumpkins that very day. As I stated earlier, I had no sign
of borers at the end of the year.
Frank Peregrine
Madison, WI
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