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茭白锹额夜蛾是舟山市 (区 ) 1997年初次查见的主害茭白新害虫。它以幼虫主害茭白 ,为害状似螟害的枯鞘、枯心 ,一般受害田的株受害率达 30 %～ 4 0 % ,重发田在 6 0 %～ 70 % ,甚至绝收。为解决生产急需的预测预报、最佳施药适期和筛选高效防治农药等问题 ,作者进行了 2年试验研究 ,从而得出了灯光诱蛾预测及在田间以 2龄幼虫为主期 (即初见茭白心叶青卷为害状时 ) ,每公顷用杀螟松 2 .2 5kg、三唑磷 2 .2 5kg、久效磷 1.2 kg,各掺水 2 2 50 kg喷雨防治 ,可分别达 90 .3% ,88.1% ,92 .5%的效果 ,其防治区比对照区增产 95%以上。
茭 white shoal Spodoptera is Zhoushan City (district) for the first time in 1997 to see the main victims 茭 white pests. It is the main larvae larvae pericarp damage like stem borer of the dead shell, dead heart, the general victimization of the damage rate of the field of 30% ~ 40%, field retransmission at 60% to 70%, or even absolute. In order to solve the problems such as the much-needed prediction and forecast, the optimum application and the screening of pesticides, the author conducted a 2-year experimental study, which led to the forecast of light-induced moth and the predominant period of 2nd-instar larvae in the field First saw a white heart Ye Qing volume damage when the state), per hectare fenitrothion 2.25kg, triazophos 2.52kg, monocrotophos 1.2 kg, each mixed with 2 2 50 kg rain control, respectively, respectively, Up to 90.3%, 88.1% and 92.5%, and the control area increased yield by more than 95% over the control area.