将乐县竹螟发生规律及防治初步研究

Preliminary studies on occurrence of bamboo snout moth and its control in Jiangle County

竹螟是将乐县重要竹类食叶害虫之一。调查发现竹绒野螟和竹织叶野螟是其主要种类,主要危害毛竹、绿竹、苦竹。竹绒野螟发生更为严重,在将乐一年发生1代,以小幼虫越冬。采用拉丁方设计和正交试验对竹螟开展防治试验,结果表明,采用森得宝和轻质CaCO3按1∶10混配使用防效最佳,用药4 d后校正防效达到85%,生产上可推广应用,但在使用过程中要注意气候因素的影响;通过不同药剂混配试验筛选出混配药剂的最佳组合,即杀螟杆菌(10.0×109个.g-1)500倍液,40%氧化乐果1400倍液,20%氰戊菊酯乳油2000倍液,白僵菌按4.0×109个.g-1进行配比,不仅直接杀虫,还能增加林间带菌量、持续控害,宜于林间推广应用。一些自然天敌也具有持续控害作用,需要加以保护和利用。

Bamboo snout moth was a kind of important pests which infest the leaves of bamboos in Jiangle County.Crocidophora evenoralis Walker and Algedonia coclesalis Walker were found main species,and C.evenoralis infest bamboo leaves more seriously than A.coclesalis and completed one generation per year which overwintered with younger larvae.The Latin square design and orthogonal experimental design were used to control these pests in bamboo forest.The results showed that different biological agents and concentrations had remarkable impact on the control effect of larvae,and sendebao（with 1∶10 calcium carbonate light） was the optimal biological agent with revised effect 85% after 4 day′s spraying.The affection of climate factors on effect must be focused when it could be generalized in bamboo forest.The optimal combination of different pesticides was also mixed and singled out control these pests,Bacillus cereus（10 billion spores·g-1） 500×,40% omethoate 1400×,20% fenvalerate oil 2000× and B.bassiana（4 billion spores·g-1） were mixed not only to kill pests directly,but also increase insect disease germs to control pests sustainably.Some nature enemies should also be protected and adopted to control bamboo snout moth.