據調查統計，截至5月25日，全市玉米螟發生面積69.7萬畝，較上年同期減18.7%，平均螟害率2.38%，較上年同期低0.88個百分點，忠縣局部田塊最高螟害率達30%。經綜合研判分析，預計2020年玉(yu)(yu)米螟總體發(fa)生程(cheng)度為3級(ji)，發(fa)生面(mian)積220萬(wan)畝(mu)次左右(you)。建(jian)議：各地(di)植保部(bu)門要(yao)認真做好玉(yu)(yu)米螟的監(jian)測預警工作(zuo)，及時發(fa)布病蟲(chong)(chong)(chong)(chong)情報，抓(zhua)住玉(yu)(yu)米心(xin)葉末期和穗期或幼蟲(chong)(chong)(chong)(chong)低齡時的防治關鍵期，指導(dao)農戶開展防治。優先使用(yong)毒(du)·蜂殺(sha)蟲(chong)(chong)(chong)(chong)卡（俗稱生物導(dao)彈，畝(mu)用(yong)6-8枚毒(du)·蜂殺(sha)蟲(chong)(chong)(chong)(chong)卡，在心(xin)葉末期釋放赤眼蜂2-3次）。在一代玉(yu)(yu)米螟蟲(chong)(chong)(chong)(chong)株率達20%，二代玉(yu)(yu)米螟百株蟲(chong)(chong)(chong)(chong)量100頭(tou)時可(ke)選用(yong)生物藥(yao)(yao)劑(ji)蘇云(yun)金(jin)桿菌拌細沙灌心(xin)或甘藍(lan)夜(ye)蛾核型多角(jiao)體病毒(du)、球孢白僵(jiang)菌兌(dui)水噴(pen)霧(wu)，化學藥(yao)(yao)劑(ji)可(ke)使用(yong)氯蟲(chong)(chong)(chong)(chong)苯甲酰(xian)胺、辛硫磷(lin)兌(dui)水噴(pen)霧(wu)。
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