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采用生物活性法对植物源农药沙黄乳油在稻株内的输导及其对褐飞虱的毒力进行了研究。试验表明 ,1 8%沙黄乳油 1 0 0 0倍液经须根内吸向上输导 2 4hr后 ,若虫和成虫的校正死亡率分别为 96 5 6 %和 93 1 0 % ,它们的LC5 0 和回归方程分别为 41 3 82 6 0± 1 0 931 μg/ml,Y =- 8 1 1 0 4+ 5 0 1 0 1X和 485 70 78± 1 0 1 33μg/ml、Y =- 7 6 40 5 + 4 70 5 4X ,两者的LT5 0 与回归方程分别为 7 8996± 1 0 86 9h、Y =2 76 1 3+ 2 4938X和 1 2 0 848± 1 1 0 0 0h、Y =3 2 1 6 7+ 1 6 479X。同时 ,该剂还能经叶片内吸向下输导 ,1 0 0 0倍液处理叶片 5 2hr后 ,若虫和成虫的校正死亡率分别为 74 5 5 %和 6 7 79% ,它们的LC5 0 与回归方程分别为 6 1 4 0 72 6± 1 2 1 80 μg/ml、Y =- 2 5 999+ 2 72 5 7X和 6 43 5 0 77± 1 0 82 7μg/ml、Y =- 0 5 40 5 + 1 972 7X ,两者的LT5 0 和回归方程分别为 1 5 946 6± 1 31 98hr、Y =3 2 1 42 + 1 4848X和2 0 6 46 1± 1 1 998hr、Y =3 0 6 81 + 1 46 93X。可见 ,该剂具有良好的内吸双向输导作用 ,其内吸输导能力以须根内吸向上输导最强
The biologically active method was used to study the plant-derived pesticide yellow oil in rice and its virulence to N. lugens. The results showed that the corrected mortality of nymphs and adults were 96 5 6% and 93 10%, respectively, after the superoxide dismutase (180%) of 18% The regression equations were 41 3 82 6 0 ± 1 0 931 μg / ml, Y = - 8 1 1 0 4+ 5 0 1 0 1X and 485 70 78 ± 1 0 1 33 μg / ml respectively, Y = - 7 6 40 5 + 4 70 5 4X, the LT5 0 and the regression equation of the two are respectively 7 8996 ± 1 0 86 9h, Y = 2 76 1 3+ 2 4938X and 1 0 2848 ± 1 1 0 0 0h, Y = 3 2 1 6 7+ 1 6 479X. At the same time, the agent can also be guided downwards by the leaf internal absorption. The corrected mortality rates of nymphs and adult worms after 74 days were 100%, 74.5% and 67.9%, respectively, and their LC50 And the regression equation were 6 1 4 0 72 6 ± 1 2 1 80 μg / ml, Y = - 2 5 999+ 2 72 5 7X and 6 43 5 0 77 ± 1 0 82 7 μg / ml, Y = - 0 5 40 5 + 1 972 7X, the LT5 0 and the regression equation of the two are respectively 1 5 946 6 ± 1 31 98hr, Y = 3 2 1 42 + 1 4848X and 2 0 6 46 1 ± 1 1 998hr, Y = 30 6 81 + 1 46 93X. Visible, the agent has a good bi-directional absorption of internal absorption, the absorption capacity of its internal absorption to the strongest absorption within the root guide