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What pest is this?
Mike wrote:
I've got good news and bad news. The good news is that you're not going to hurt the fauna you're fond of. That's because of the bad news: there's no IPM for stem sawflies, i.e. no way to treat stem sawflies other than pruning, *unless* you're comfortable using a systemic insecticide. There are reasons not to do that, mostly having to do with spider mites. Rose stem sawflies get some buds every year, but not many of them. Spider mites are considered the much greater risk to roses, and the use of systemic insecticides is thought to suppress spider mite predators. I'm guessing that's because most systemic insecticides have both systemic and contact action, but I don't know for sure as I never use them. I had sawflies before I began using Orthenx, and do not have it now. Moreover, I do not and have NEVER had spider mites. Go to the Ortho.com page and read about Orthenex. It does not have a contact insecticide. It works systemically. There is now a miticide added to it, as well. The latter addition is a fairly recent development. There is no reason to allow sawflie damage in your garden, Mike. I have been using this stuff for three or four years--and contrary to the Chicken Little people, I have earthworms, lady bugs, bees, etc. I do not have spider mites, and in fact have no insect damage at all save thrips. Surely there are others who have the same experience. Weeeell, that is good news/bad news. I'll do a little research and see if they have natural enemies or if you can see the eggs and pick them off, etc. I wonder why I've never seen the damage before? Maybe they get so few buds I just never noticed. Hopefully. g It sounds like using an isecticide is a cure worse than the disease, though. NOT. Do your research. |
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