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松茸毒蛾(Dasychira axutha Collenette)是马尾松(Pinus massoniana)的重要害虫,在广东湛江地区一年发生4代,第一代3月中下旬至6月中旬,第二代5月下旬至8月上旬,第三代7月中旬至10月上旬,第四代9月中旬至翌年8月。幼虫一般为6—7龄,以蛹越冬,在枯枝落叶或灌木丛中结茧。 已经采集到18种天敌,包括寄生性天敌11种;捕食性天敌4种。病菌3种。其中特别重要的天敌是松茸毒蛾核多角体病毒。卵期寄生率达51—75％,蛹期死亡率达89％。 试验结果表明,除虫菊脂、敌百虫、敌敌畏和双硫磷对防治幼虫有很好的效果。
Dasychira axutha Collenette, an important pest of Pinus massoniana, occurs in four generations a year in Zhanjiang, Guangdong Province. The first generation is from mid-late March to the middle of June and the second generation is from late May to early August , The third generation in mid-July to early October, the fourth generation in mid-September to August the following year. Larvae are generally 6-7-year-old, overwintering with pupae, and cocooning in litter or shrubs. Eighteen natural enemies have been collected, including 11 species of parasitic natural enemies and 4 species of predatory natural enemies. Three kinds of bacteria. One of the most important natural enemies is the mammoth nuclear polyhedrosis virus. Ovarian parasitism rate of 51-75%, pupal mortality rate of 89%. Test results show that pyrethrum, trichlorfon, dichlorvos and diphtheria have very good effects on controlling larvae.