lreich at hvc.rr.com
Sat Jun 18 07:52:48 EDT 2005
I mix sulfur in with my all my Surround sprays and, as I said, still
extensive curculio damage -- my rough guess is 80% despite diligent
spraying and good coverage using backpack Stihl mist sprayer.
Lee Reich, PhD
On Jun 17, 2005, at 5:12 PM, Stephen Sadler wrote:
> Researching a little further, I find a study that found that
> Surround WP
> combined with sulfur and lime sulfur controlled plum curculio
> better than
> Surround alone. No, I don't know why the sulfur would help. Maybe
> irritating to the bugs, maybe there are less fungal diseases,
> therefore less
> fruit fall, therefore less immediate habitat - but I'm sticking to
> my "I
> don't know."
> Rodale suggests a spray of Pyrethrum at pink and/or petal fall in
> an effort
> to further control PC, followed by Surround from petal fall through
> Stephen Sadler, Ph.D.
> USDA 9, AHS heat zone 8,
> Sacramento CA - Mediterranean climate
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