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近年来,在防治松毛虫的过程中,经常发现有些被怀疑为是病毒致死的虫尸,难于鉴别。1974年曾先后在广州近郊区龙眼洞和广东省东莞县黄江公社发现松毛虫突然出现大量死亡的现象。虫龄一般为5-6龄。在现场几乎每株树下都有虫尸,大树下一般10-30条,多的可达150多条。落地的虫尸不久即发黑、弯曲。吊在松枝、松针上的虫尸,头大尾小,皮
In recent years, in the process of prevention and control of pine caterpillars, it is often found that some of the zergids suspected of being virus-dead are difficult to identify. In 1974, he successively discovered a large number of sudden deaths of pine caterpillars in Longyan Cave near the outskirts of Guangzhou and the Huangjiang commune in Dongguan County, Guangdong Province. Insect age is generally 5-6 years old. Almost every tree in the scene there are dead pests, the tree under the general 10-30, up to more than 150. Pest dead landing black, curved. Hanging in the pine branches, pine needles on the dead, big tail, skin