[NAFEX] Control for persimmon psylla?
lovehd at comcast.net
Wed Jun 6 11:01:41 EDT 2007
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
----- Original Message -----
From: "Scott Smith" <scott at cs.jhu.edu>
To: <nafex at lists.ibiblio.org>
Sent: Tuesday, June 05, 2007 8:01 PM
Subject: Re: [NAFEX] Control for persimmon psylla?
> > How bad is the damage from the psylla if you do nothing?
> The years that I did not know how to control it all the leaves were
> extremely distorted and the trees hardly grew at all. The trees grew
> only a foot or two in their first three years. So it seemed like a
> really bad thing. Lucky, the fact that you are only getting mild
> damage makes me think that is the normal case - if everyone had it as
> bad as I had been getting it there would be a lot more fuss being
> made about it. I could have had it especially bad due to the fact
> that my trees had the psylla from the moment they were planted and
> were more susceptible to attack in their weak state. Last year I
> finally got it under control and the trees got their first year of
> strong growth, so it could be that I don't need to be as aggressive
> about it anymore. But, its hard for me to let nature takes its
> course after seeing my trees suffer so much. I did let it go in the
> later months last year after I had beaten it completely back in June,
> and the psylla did not get going again that year.
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