湘乡市第一代马尾松毛虫发生情况测报初探

A preliminary prediction study on the first generation of Dendrolimus punctatus in Xiangxiang City

马尾松毛虫是湘乡市的主要林业有害生物。2017年度,本试验通过频振式诱虫灯诱集越冬代马尾松毛虫成虫进行种群动态监测,结果表明:5月30日是越冬代马尾松毛虫成虫上灯的高峰期,用期距法预测第一代3龄幼虫高峰期为6月19日,为最佳防治时期。有效基数法和危害程度预测数据均表明湘乡市月山镇群乐村2017年第一代马尾松毛虫虫口基数过大,建议提前做好防治准备工作,避免翌年越冬代幼虫暴发成灾。

Dendrolimus punctatus is one of the main forestry pests to damage the pine in Xiangxiang City.This study used frequency-vibrancy pest-killing lamps to lure the adult moths and monitored the overwintering generation of Dendrolimus punctatus population combining with artificial investigation.The results showed that the peak period of Dendrolimus punctatus adults was on May 30, and the first generation of three instars peak would be on June 19 which was the optimum stage to control.Effective Base Method and Damage Degree Predication both indicated that the whole first generation population was too large in Qunle Village, Yueshan Town, Xiangxiang City, and if the timely and effective control measures were not taken, it would lead to serious damage for the pine in the next year.