ciezhuyaoweihaifengshudengduozhongkuoyeshudeshuye,chongliangduoshinengjiangzhengzhi、zhengshudeshuyechiguang,yanzhongyingxiangshumushengzhang。xiamianweinijieshaociechonghaidetedianjifangzhifangfa。
刺蛾虫害的特点:
1.在我国南方,刺蛾一般一年发生2至3代,五六月开始危害。多以老熟幼虫作茧在树上或附近松土中过冬,作茧时常在树上爬动或落在地面上。在树上过冬的虫茧为扁椭圆形,与树皮颜色相似;在土内过冬的为椭圆形,形似羊粪球,与土颜色相似。
2.chengchongchanluanzaishuyeshang,duoshuchanzaiyebeichengkuaizhuang,yeyoudanlihuojilichanzaiyeshang。youchongyouqunjuweihaidexixing,jiangyepiankenchengdapianshenzhizhengyeweihuibaisewangzhuangban,jiyifaxian,zuiduodeyipianyeshangyoujishitouchong。
3.meiyidaiyouchonglaoshuhoudouyaozuojianhuayong,zuojiandidianyinzhongleibutongeryi。jibanlvciezaishuzhi、shuganshang;shuangchilvciezaishuganjibu,shuzhiheshuganshangbachu、cupiliefengchudeng;huangciezaixizhishang;hebianlvciezaishuxiasongtuzhong。
4.cietiandijiaoduo,yifaxiandeyoushanghaiqingfeng、zijifeng、guangjianxiaofeng、jifeng、chiyanfengdeng。
ciechonghaidefangzhifangfa:
1、xiaomiechongjianneideyouchong。lejiedangdiciezuojiandedidian,yuqiudongjihexiajizaishuzhi、shuganfenzhichu,aotubupingchu,shupifengchu,shuganjibuhefujinsongtuli,jian、gua、wachongjianhouxiaomie。zaishuganshangzuojiande,yekezaishuganchanbangcaosheng,yinyouhaichongzuojianbingjizhongxiaomie。
2、在4、5月份经常检查,发现有灰白色透明斑块的叶片,及时剪掉带虫枝叶,消灭幼虫。
3、liyongyoujishengxingdeshanghaiqingfeng、zijifeng、guangjianxiaofeng、jifeng、chiyanfengdengcietiandijinxingshengwufangzhi。
4、虫量多时,可喷洒1万倍的20%除虫脲(灭幼脲1号),毒杀幼虫。(在1至3龄幼虫期使用效果最好)。虫龄较大时,也可喷洒1500至2000倍的50%锌硫磷乳油。