[NAFEX] (no subject)
Scott Smith
scott at cs.jhu.edu
Wed Jun 6 15:15:51 EDT 2007
That could be a problem, but for two years I thought it was a disease
and was spraying sulphur, copper, etc which would have almost no
effect at all on predators. I have only done two malathion sprays in
the five years; one of them was last weekend. The oil or soap could
have in theory done in a predator; I never saw any predators on them.
My guess is I have some different condition - the trees were
particularly weak, the ants I have are particularly good at moving
psylla to new locations (if they even do that - I'm not sure what the
symbiotic ants are doing), the common predator has yet to show up in
my yard, there is some spore or virus that they normally catch but it
has not caught up with my psylla yet, etc.
Anyway, for some good news I hope to finally get some persimmons this
year. My Hachiya, Great Wall, and Chocolate are all loaded with baby
persimmons.
Scott
> I have a lot of psylla here in northern TN, but I have not seen any
> detrimental effects, just minor cosmetic damage. The trees are
> growing very
> vigorously now in their second year, having reached about 10 feet,
> with the
> grafts about 4 feet off the ground. I also got my scions from
> Scott, so I'm
> growing the same clones. I'm wondering if Scott's spraying to
> control them
> is eliminating/reducing a beneficial insect. I have never sprayed
> anything
> on mine.
>
> Hal
>
>
>
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