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#1
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Pine sawfly?
Hi,
I am emailing from Houston, TX. Recently my neighbor discovered hundreds of caterpillar like insect larvae on his pine tree. They are about 1/2 inch in length, yellow-ish with black dots on their back. There seem to be a few leg-like structures near the head. I did my google search and am leaning towards 'pine sawfly larvae' as the closest match. The tree is deteriorating. It's losing its needles, and some branches are completely free of needles. He treated the tree with a spray insecticide yesterday (sorry, don't know which one). My questions, is it likely to observe pine sawfly larvae in November in Southern Texas? I am afraid I miss-identified the problem. Is there anything else we can do, in particular to prevent the spreading of the insect from one tree to the next (which, in this case, would be mine....). Thanks, Tim. |
#2
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Pine sawfly?
On Tue, 06 Nov 2007 19:11:40 -0000, wrote:
My questions, is it likely to observe pine sawfly larvae in November in Southern Texas? I am afraid I miss-identified the problem. Is there anything else we can do, in particular to prevent the spreading of the insect from one tree to the next (which, in this case, would be Can't help you directly, but Texas has an *excellent* extension service. Submit a sample of the larvae for id. Talk to Harris Co. Extension to find out how: http://harris-tx.tamu.edu/ http://insects.tamu.edu/extension/ |
#3
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Pine sawfly?
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#4
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Pine sawfly?
If they are caterpillers BT will get them and it is safe to use.
From Mel & Donnie in Bluebird Valley http://community.webtv.net/MelKelly/TheKids |
#5
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Pine sawfly?
The tree is deteriorating. It's losing its needles, and some branches are completely free of needles. That's common and natural on a maturing pine tree. Pines in our area have been shedding needles for over a month. That's not a problem. As trees mature such as pines, often, some branches cannot manufacture enough food for the branch and the branch becomes symplastless, sheds its needles and is then shed. Shedding woody and non-woody parts is common and good for the survival of the tree. Very common and natural. We do not spray anything on the pines we care for. -- Sincerely, John A. Keslick, Jr. Consulting Arborist http://home.ccil.org/~treeman and www.treedictionary.com Beware of so-called tree experts who do not understand tree biology. Storms, fires, floods, earthquakes, and volcanic eruptions keep reminding us that we are not the boss. |
#6
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Pine sawfly?
Also just because an organism injures a tree does not mean the organism is
bad and requires to be killed. E.g, http://www.treedictionary.com/DICT20...-cavities.html -- Sincerely, John A. Keslick, Jr. Consulting Arborist http://home.ccil.org/~treeman and www.treedictionary.com Beware of so-called tree experts who do not understand tree biology. Storms, fires, floods, earthquakes, and volcanic eruptions keep reminding us that we are not the boss. wrote in message oups.com... Hi, I am emailing from Houston, TX. Recently my neighbor discovered hundreds of caterpillar like insect larvae on his pine tree. They are about 1/2 inch in length, yellow-ish with black dots on their back. There seem to be a few leg-like structures near the head. I did my google search and am leaning towards 'pine sawfly larvae' as the closest match. The tree is deteriorating. It's losing its needles, and some branches are completely free of needles. He treated the tree with a spray insecticide yesterday (sorry, don't know which one). My questions, is it likely to observe pine sawfly larvae in November in Southern Texas? I am afraid I miss-identified the problem. Is there anything else we can do, in particular to prevent the spreading of the insect from one tree to the next (which, in this case, would be mine....). Thanks, Tim. |
#7
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Pine sawfly?
D. Staples wrote:
Natural control factors generally bring outbreak populations under control after one season. As noted, sanitation under the stems through out the summer will reduce or destroy the population. What does that mean, sanitation under the stems? Keep clear of pine needles under the tree? Kate |
#8
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Pine sawfly?
kate wrote:
D. Staples wrote: Natural control factors generally bring outbreak populations under control after one season. As noted, sanitation under the stems through out the summer will reduce or destroy the population. What does that mean, sanitation under the stems? Keep clear of pine needles under the tree? Kate They pupate in the debris under the tree they were in, clean up the debris, or if your into nasty garden chemicals poison the debris, and it can reduce the populations from generation to generation. |
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