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对原是北方防治旱作害虫的3％甲基异柳磷颗粒剂,应用于防治我国南方稻区主要害虫之一的稻瘿蚊,通过室内苗期盆栽接虫用药试验、多点异地田间小区试验及大面积应用验证结果表明,此药能有效地杀死已侵入稻株生长点内的稻瘿蚊低龄幼虫。秧田于播后7～10 d,本田于移栽后5～7 d一次性用药,每亩3～4 kg,防治效果可达85％～93％;在水田泥面中的残效期为15～20 d,对已受稻瘿蚊幼虫为害4 d以内的秧苗有杀虫保苗的效果;对水稻生长无不良影响。大面积应用示范,经济效益显著。
The original 3% methyl isofenphos granules for dry-farming pests in the north were applied to the control of rice gall midge, one of the major pests in the rice planting area in southern China. Through the pot experiment with potted insects in the indoor seedling stage, more remote field plots Tests and large-scale application verification results show that the drug can effectively kill the young larvae of rice gall midge that have invaded the growth point of rice plants. 7 ~ 10 days after sowing, the Honda transplanted 5 to 7 days after a one-time medication, 3 ~ 4 kg per acre, control effect of up to 85% to 93%; paddy surface residual effect of 15 ~ After 20 d, the seedlings that had been damaged by rice gall midge mosquito larvae within 4 days had insecticidal and seedling protection effects and no adverse effects on rice growth. Large-scale application demonstration, significant economic benefits.