微红梢斑螟的发生和防治研究

STUDIES ON OCCURRENCE AND METHODS OF CONTROL OF DIORYCTRIA RUBELLA HAMPSON

微红梢斑螟是危害松类的嫩梢、球果、芽和干的重要害虫。该虫在浙江省一年发生2至3代,以初龄幼虫在冬芽、枯梢或以中老龄幼虫在害梢中越冬。4月下旬至6月下旬,7月中旬至9月中旬和9月下旬至10月中旬分别是越冬代,第1、2代成虫出现期。在马尾松、湿地松和火炬松种子园中的观察,了解了幼虫钻蛀芽、梢、果和干的不同习性,以及该虫发生与绒茧蜂、长体茧蜂等天敌的关系。通过研究,提出了灯诱杀虫、早春喷梢、打孔注射和保护天敌的防治措施。

Dioryctria rubella Hampson is an important insect pest of the piney shoot, bud, cone and trunk. According to field observation and laboratory rearing, this insect has 2 to 3 generation a year in Zhejiang Province with early or middle and late instar larvae hibernating in bud, dead shoot or infested shoot. The adults of the overwintering, first and second generation occur from late April to late June, mid-September and late September to mid-October respectively. The larval boring habits in bud, shoot, cone and trunk and the relationship between the occurrence of the pest and the natural enemies of Macrocentrus sp. etc. were observed in the seed orchards of Pinus massoniana, P. elliottii and P. taeda. Experimental results showed that blacklight trap, spraying omethoate in early spring and punch-driping SN-851 were effective.