BT works on caterpillars(moth and butterflies) and BT israelinsis works on mosquito larvae.The borers are beetles and the damage is done by the beetle larvae chewing around in the cambium layer of the tree destroying the actual growing layer.The poison of choice is Lindane which is the last chlorinated hydrocarbon not to be banned(related to DDT).An oil dormant spray may help and is not toxic per se.Woodpeckers are attracted to borer larvae as food but the underlying problem is the lack of health in the tree.Borers are just a symptom of something else going on.Healthy unstressed trees do not get borers or other problems.The bugs are natures way of beginning the breakdown and recycling to come.

Everything stats with the health of the soil.I would start with the soil when I plant anything.If the soil is good environment for earthworms it will be good for a tree.pH of soil should have pH around 5.5-6.5.It should have good drainage.Should have organic matter,clay colloid,loam,loam.SulPoMag is a good start up fertillizer and I like using som colloidalPhosphate or rock Phosphate.If no SulPoMag use Sulphate of Potash and some epsonsalt about a half cup of each mixed in,acouple cups of rotted chicken manure is good too.---Holland
I wonder if bacillus thuringer would kill them. Very nice bionic control if it does, and you only have to apply once.

Marshall

[email protected] wrote:

In a message dated 5/3/04 11:47:18 AM Central Daylight Time, [email protected] writes:
If the borer beetles are coming up from debree and or the
soil---yes,tanglefoot would stop them.If the beetles are flying in
then---No.

Hmmmm -- I don't know where the heck they're coming from. All I know is that for the past 18 years, every damn tree that I plant dies from borers attacking it. And I feed them well, water them in drought and spray for borers the way the nursery tells me to. I've got two young Kwanzan Cherries dying in the front yard right now. They replaced two Dogwoods. Which replaced two Dogwoods. Ad infinitum. Borers have also badly damaged two young Maple trees, and my cherry (producing) tree. I'm SO disgusted. This year I tried Diamataceous Earth for the first time. Don't know if it's working or not. Unfortunately, I find out if the product is (not) working by the tree dying the following year. :-( Thanks for the info. MA




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