2024年7月18日 星期一 19:43:55

怎样防治玉米红蜘蛛

    玉米红蜘蛛以成、若螨刺吸玉米叶背组织汁液,被害处呈失绿斑点,影响光合作用。为害严重时,叶片变白、干枯,籽粒秕瘦,造成减产,对玉米生产造成严重影响。
  发生条件与传播途径:玉米红蜘蛛喜高温低湿的环境条件,干旱少雨年份或季节发生较重。以雌成螨在作物、杂草根际或土缝里越冬。越冬雌成螨不食不动,抗寒力强。春季气温达7—12℃以上产卵孵化,发育至若螨和成螨时,转移至杂草和玉米上为害。7—8月进入为害盛期。
  防治技术:
  (1)农业防治。深翻土地,将害螨翻入深层;早春或秋后灌水,将螨虫淤在泥土中窒息死亡;清除田间杂草,减少害螨食料和繁殖场所;避免玉米与大豆间作。
  (2)药剂防治。当叶螨在田边杂草上或边行玉米点片发生时,进行喷药防治,以防扩散蔓延。可用20%三氯杀螨醇乳油、73%克螨特乳油或5% 尼索朗乳油1500倍液喷雾防治。其它防治麦红蜘蛛的药剂亦可用于防治玉米红蜘蛛。

 

 

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