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为筛选出高效安全的土壤处理杀虫剂,室内采用浸叶法比较了溴氰虫酰胺、氯虫苯甲酰胺、氟虫双酰胺与8种常规杀虫剂对小地老虎的毒力,用滤纸接触法和人工土壤法分别测定了11种药剂对蚯蚓的急性毒性,并通过盆栽试验比较了其对小地老虎和蚯蚓的选择毒性。结果表明,3种双酰胺类杀虫剂对小地老虎的室内毒力明显高于其它8种对照药剂,对蚯蚓的LC50均属于低毒级,其中以溴氰虫酰胺的毒力选择性最高。盆栽试验中双酰胺类药剂防虫效果均低于其它对照药剂,10%溴氰虫酰胺可分散油悬浮剂保苗效果显著高于5%氯虫苯甲酰胺悬浮剂和20%丁硫克百威乳油,且双酰胺类药剂对蚯蚓没有明显致死作用。说明在棉田选择溴氰虫酰胺能够控制小地老虎的危害。
In order to screen efficient and safe soil-processing insecticides, the indoor dipping leaf method was used to compare the toxicity of bromoxetane, chlorantraniliprole, flubendiamide and eight kinds of conventional insecticides to the small Tigers The acute toxicity of eleven agents to earthworms was determined by filter paper contact method and artificial soil method, respectively. The pot toxicity was compared with that of earthworm. The results showed that indoor toxicity of three kinds of bisamide insecticides was significantly higher than that of the other eight kinds of control agents. The LC50 of earthworms belonged to the low toxicity level, among which the toxicity selectivity of bromothiramide was the highest . The results showed that the insecticidal effect of bisamide in pot experiment was lower than that of the other control agents. The seedling protection effect of 10% bis (ammethrin amide) dispersible oil suspension was significantly higher than that of 5% chlorantranilone and 20% , And bisamide-based agents have no significant lethal effect on earthworms. Indicating that the choice of bromoxetane in the cotton field can control the harm of the Tigers.