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Post by GaryS on Jul 28, 2024 6:17:56 GMT -5
I started replacing the pine trees on my property years ago, just a few at a time whenever I see the for sale. Now I am having a problem with what I think are screw flies. The larva will eat all the pine needles off the trees. If I see them in time I can take a pole and knock the off and they die. Spray will kill them but some of the trees are too tall. Anyone know if there is a systemic product I could use to make the trees poisonous to the larva? I remember bayer being advertised an a gardening show I used to listen to.
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Post by garycoleco on Jul 28, 2024 6:38:22 GMT -5
imidacloprid is what you want. That said sawflies (assuming what you have) rarely if ever kill trees.
It's best to kill them when they go back into the soil after the season. imidacloprid is deadly to all insects. Just use it carefully
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Post by Crkr 23 on Jul 28, 2024 6:55:20 GMT -5
This doesn't apply to pine trees, but be very careful using it in on flowering trees. Make sure that they are through blooming because it will kill the hell out of bees. I used it on citrus trees after the spring bloom as directed. A few of the trees had a late "June" bloom and it killed a hive of wild bees that I had in my yard.
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Post by GaryS on Jul 29, 2024 5:08:55 GMT -5
imidacloprid is what you want. That said sawflies (assuming what you have) rarely if ever kill trees. It's best to kill them when they go back into the soil after the season. imidacloprid is deadly to all insects. Just use it carefully The larva is a green caterpillar with a stripe down their backs. And they are in groups like a bunch of grapes. Does this sound right if they are saw flies? You also mention them going into the soil, is this where they live? Thanks for the information. Will look int imidacloprid probably for next year I think they are slowing down now but I will be ready for them next year.
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Post by bswiv on Jul 29, 2024 5:18:56 GMT -5
imidacloprid is what you want. That said sawflies (assuming what you have) rarely if ever kill trees. It's best to kill them when they go back into the soil after the season. imidacloprid is deadly to all insects. Just use it carefully The larva is a green caterpillar with a stripe down their backs. And they are in groups like a bunch of grapes. Does this sound right if they are saw flies? You also mention them going into the soil, is this where they live? Thanks for the information. Will look int imidacloprid probably for next year I think they are slowing down now but I will be ready for them next year. "Pine trees".......?? Species? Age/size? Planted in what sort of soil?
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Post by garycoleco on Jul 29, 2024 6:48:45 GMT -5
imidacloprid is what you want. That said sawflies (assuming what you have) rarely if ever kill trees. It's best to kill them when they go back into the soil after the season. imidacloprid is deadly to all insects. Just use it carefully The larva is a green caterpillar with a stripe down their backs. And they are in groups like a bunch of grapes. Does this sound right if they are saw flies? You also mention them going into the soil, is this where they live? Thanks for the information. Will look int imidacloprid probably for next year I think they are slowing down now but I will be ready for them next year. Red head sawfly. They're greenish and black spotted, but could look striped (in rows). They overwinter in the ground. You can treat around the base of the tree out to the drip line with a grub killer
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