1991～ 1 997年 ,通过室内生测和田间多点试验示范 ,系统分析了三唑磷对水稻三化螟、二化螟和褐飞虱的触杀活性、对稻株的渗透性、胃毒作用和杀卵活性、持效期以及田间效果。结果表明 :1三唑磷对三化螟、二化螟蚁螟的接触 L D5 0 (× 1 0 - 4 μg)分别为每头 0 .6 1 82、0 .41 6 8,远远低于甲胺磷相应的 L D5 0 值 1 4 .7732、1 7.80 2 9,对 3龄褐飞虱的 L D5 0 值与甲胺磷相近 ,对 5龄褐飞虱的触杀活性低于甲胺磷 ;2三唑磷对稻株的渗透性和对三化螟的胃毒作用强 ,喷药后 1 d、3d的渗透杀虫效果均为 1 0 0 % ;3三唑磷防治三化螟的持效性长 ,5 0 0 mg/ L 药后 1 0 d接虫的杀虫效果仍达 86 .7% ,而甲胺磷 1 0 0 0 mg/ L 药后 3d效果降为 0 ;4三唑磷 5 0 0～ 1 0 0 0 mg/ L 对三化螟前期淡黄色卵的杀死率为 71 .3%～ 73.2 % ,对后期黑色卵的杀死率为 78.3%～ 99.5 % ;5 2 0 %三唑磷乳油 2 .2 5 L/ hm2对三化螟和二化螟枯心防效均在 90 %以上 ,高于杀虫双 ,但对褐飞虱的防效差 ,明显低于甲胺磷 ,3.75 L/ hm2 对三化螟白穗的防效也在 90 %以上 ;6三唑磷对三化螟防效高而稳定 ,但对褐飞虱、稻纵卷叶螟效果差 ;7三唑磷对天敌蜘蛛的杀伤作用低于杀虫双而高于杀虫丹 From 1991 to 1997, the contact toxicity of triazophos to rice stem borer, the rice stem borer and the brown planthopper was systematically analyzed by indoor bio-test and field multi-point test. The effects of triazophos on the permeability, stomach toxicity and killing Egg activity, persistence and field effects. The results showed that the exposure of triazophos to the rice stem borer, Chilo suppressalis, L D50 (× 1 0-4 μg) was 0.61 82,0. 41 6 8 per head respectively, much lower than Methamidophos corresponding L D5 0 value of 14.7732,1 7.80 2 9, 3rd instar Nilaparvata lodgers L D5 0 values ​​similar to methamidophos, 5th instar brown planthopper contact toxicity was lower than methamidophos; 2 triazole The permeability of P to rice plants and the stomach poisoning to Borer on rice stem borer were strong, and the insecticidal effect on the 1st and 3rd day after spraying was 100%. The persistence of 3 triazophos against Bt was long , And the insecticidal effect still reached 86.7% when the insects were exposed to 500 mg / L for 10 days. However, the effect of methamidophos after 100 mg / L was reduced to 0 after 4 days of treatment. 4 Triazophos 50 The killing rate of yellowish eggs in early stage of rice stem borers ranged from 71.3% to 73.2% with 0 ~ 100 mg / L, and from 78.3% to 99.5% with black eggs in late stage. Azadirachtin 2.25 L / hm2 on the Borer and the resistance to stem borer were more than 90%, higher than the insecticidal double, but the control of the brown planthopper was poor, significantly lower than methamidophos, 3.75 The control effect of L / hm2 on the white spike of rice stem borers was over 90%. 6 Triazophos showed high and stable control effect on the stem borer, Poor leaf borer; 7 triazophos killing enemy spiders Shachongshuang below and above ethiofencarb