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- The result indicate that botanical insecticides celangulins had no marked cross-resistance with organophosphorus (phoxim) and pyrethoid (fenvalerate) insecticides. 因此，抗有機磷及菊酯類(lèi)農藥的棉鈴蟲(chóng)品系對苦皮藤素仍有其相應的敏感性。
- Farm workers frequently come in contact with these insecticides. 農場(chǎng)工人常常接觸這些殺蟲(chóng)劑。
- They observed how the crops reacted to these insecticides. 他們觀(guān)察了莊稼對這些殺蟲(chóng)劑有什么反應。
- Resistance to insecticides has been apparent for many decades. 殺蟲(chóng)劑抗藥性的出現已有數十年。
- Insecticides are widely used for controlling most insect pests. 殺蟲(chóng)劑廣泛應用于防治大多數害蟲(chóng)。
- Systemic insecticides have shown particular promise. 內吸殺蟲(chóng)劑看來(lái)特別有效。
- Some insects develop cross-resistance to insecticides. 通過(guò)某些昆蟲(chóng)使交叉抗藥性發(fā)展成為殺蟲(chóng)劑
- Both Aldrin and Chlordane are valuable insecticides. 艾氏劑和氯丹都是重要的殺蟲(chóng)劑。
- Controlling Effect of 6 Insecticides on Beet Barathra brassicae L. 6種殺蟲(chóng)劑對甜菜甘藍夜蛾的防治效果。
- Effects of Three Botanical Insecticides Against Pieris rapae L. 三種植物性殺蟲(chóng)劑對菜青蟲(chóng)的毒效。
- Tell people why it is harmful to use insecticides and weed killers. （一）告訴人們使用殺蟲(chóng)劑，除草劑等化學(xué)藥品是如何有害。
- The effects of 4 pyrethroids insecticides and methomyl are ... 4種擬除蟲(chóng)菊酯類(lèi)殺蟲(chóng)劑及滅多威對該蟲(chóng)效果差。
- These insecticides include DDT a compound banned in the United States in 1972. 這些殺蟲(chóng)劑中包括DDT，一種自1972年起在美國被禁止使用的殺蟲(chóng)劑。
- A group of insecticides called chlorinated hydrocarbons illustrate this effect. 一大批稱(chēng)為氯化烴的殺蟲(chóng)劑闡明了這種放大作用。
- After spraying insecticides over the fields,the plane was seen buzzing off. 那架飛機噴完殺蟲(chóng)劑后，迅即飛去。
- Additional insecticides and larvicides are expected to reach Dili next week. 下周,預計將有更多的殺蟲(chóng)劑和殺幼蟲(chóng)劑運抵帝力。
- Effects of Several Insecticides against Laphygma exigua in Capsicum annuum L. 幾種殺蟲(chóng)劑對甜椒甜菜夜蛾的防效試驗。
- It is mainly pyrethrin (pyrethroid) with 50 percent in the insecticides. 它們多屬擬除蟲(chóng)菊酯類(lèi)農藥,占總數的50%25;
- After spraying insecticides over the fields, the plane was seen buzzing off. 那架飛機噴完殺蟲(chóng)劑后，迅即飛去。
- It is not my contention that chemical insecticides must never be used. 我不是說(shuō)人類(lèi)決不能使用化學(xué)殺蟲(chóng)劑。
