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高效氯氰菊酯防 菜青虫是甘蓝、花椰菜、大白菜的一大害虫,如防治不及时,用药不当,可造成严重损失。近几年由于单一多次施用菊酯类药剂,该虫已产生了严重的抗性,生产上急需高效替代药剂。 4.5％高效氯氰菊酯乳油和20％菊马乳油对照试验结果表明:4.5％高效氯氰菊酯乳油防治甘蓝菜青虫,效果确切。如用药后24小时,1000m~2用有效成分9g处理,防治效果为98.4％,18g和25.5g两处理防效分别为98.8％和99.7％,对照药剂防效为94.4％,说明用4.5％高效氯氰菊酯防治甘蓝菜青虫效果是理想的,具有用量少而防效高的特点。用药量较对照药剂低10倍,而效果仍高
Beta-cypermethrin cabbage is cabbage, broccoli, a major pest of Chinese cabbage, such as prevention and treatment is not timely, improper medication, can cause serious damage. In recent years due to a single multi-time application of pyrethrins, the worm has had serious resistance, the production of urgently needed efficient alternative agents. The control experiment of 4.5% beta-cypermethrin and 20% chrysanthemum EC showed that 4.5% beta-cypermethrin could control cabbage Pieris rapae effectively. For example, after treatment for 24 hours, the control effect of 1000g ~ 2 with 9g of active ingredient was 98.4%, and the control effects of 18g and 25.5g were 98.8% and 99.7% respectively. The control efficacy of the control agent was 94.4% Cypermethrin cabbage prevention and cure caterpillar fungus effect is ideal, with a small amount of anti-high-efficiency characteristics. Drug dosage lower than the control agent 10 times, while the effect is still high