Recent Examples of sawfly from the Web
Some gooseberry sawflies can go through four generations during a summer.
The problem in asking me is that there are all manner of reasons why a spruce tree would have needles turn brown, from sawflies and budworms to fungi, viruses, mites and bad weather.
National Geographic grantee Aaron Pomerantz, an entomologist, said in his original tweet showing the sawflies.
The wormlike larvae of the larch sawfly stripped almost all the adult trees of their needles in the mid to late 1990s.
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Britannica.com: Encyclopedia article about sawfly
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