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松梢螟(Dioryctria splendidella H.S)是我国主要松林害虫,幼虫蛀食松树主梢或侧梢,致使梢头枯死,造成干形弯曲,严重影响生长,降低木材利用价值。我省年发生面积达190多万亩,受害树种有马尾松、湿地松、华山松、火炬松、油松。南漳县60万亩马尾松林就有20万亩发生松梢螟,其中七里山林场发虫17000多亩,占该场松林面积的85%,危害株率70～80%,其中幼树主梢受害率达75%。为了保护森林资源,我省各地往年多采用剪梢、喷药和熏烟等方法防治,但均未能控制虫灾。
The pine needle borer (Dioryctria splendidella H.S) is the main pine forest pest in our country. The larva eats the main shoot or side shoots of the pine tree, causing the shoots to die, resulting in dry bending, seriously affecting the growth and reducing the wood utilization value. Occurred in our province area of more than 190 million mu, the victim trees are Pinus massoniana, Pinus elliottii, Huashan pine, loblolly pine, pine. Nanzhang County, 60 acres of Pinus massoniana Song pine borer has 200000 acres, of which 17000 acres of Qilishan forest field worm, accounting for 85% of the pine forest area, the damage rate of 70 to 80%, of which the main shoots of young trees Damage rate of 75%. In order to protect the forest resources, many provinces in the past year use cutting tips, spraying and fumigation and other methods of prevention and treatment, but failed to control pests.