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(1)昆虫保幼激素类似物“734-Ⅱ”[亦称“J002”,化学名称为1-(对乙基苯氧基)6,7-环氧-3,7-二甲基辛烯-2]对家蚕(Bombyx mori L.)具有很高的保幼激素活性。以百万分之四(4ppm)浓度于五龄中期喷布于蚕体,可使五龄经过时间延长1—1.5天,茧层量增加10—13％。 (2)“734-Ⅱ”乳油易于兑水稀释到一定浓度,乳化性能良好,自然贮放4—6个月,50℃贮放7昼夜,—5℃贮放1昼夜稳定性良好。乳油兑水稀释液在25℃下放于暗处贮存3昼夜其生理活性未降低。 (3)应用“734-Ⅱ”增产蚕丝大面积试验证明:“734-Ⅱ”乳油使用方便,手续简单,效果明显。 (4)提出了在生产中应用保幼激素增产蚕丝的注意事项。
(1) Insect juvenile hormone analogue “734-II” [also known as “J002” with the chemical name of 1- (p-ethylphenoxy) 6,7-epoxy-3,7-dimethyloctene -2] has high juvenile hormone activity on silkworm (Bombyx mori L.). Spraying silkworms in mid-fifth instar at a concentration of 4ppm (4ppm) can prolong the fifth-instar larval time by 1-1.5 days and increase the cocoon layer by 10-13%. (2) “734-Ⅱ” EC is easy to dilute to a certain consistency with water, has good emulsifying property, naturally stored for 4-6 months, stored for 7 days at 50 ℃ and stored well for 1 day and night at -5 ℃. Cream diluted with water at 25 ℃ placed in the dark for 3 days and nights its physiological activity was not reduced. (3) The application of “734-Ⅱ” increased production of silk large area test proved: “734-Ⅱ” EC easy to use, simple procedure, the effect is obvious. (4) Put forward the precautions of applying juvenile hormone to increase silk production in production.