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【目的】红火蚁Solenopsis invicta目前的主要防治方法为化学防治,了解红火蚁防治常用的药剂在绿地环境中的残留动态将有助于我们合理使用药剂。【方法】应用气相色谱建立了红火蚁常用药剂残留的测定方法,并测定了不同施用类型药剂防治草坪上的红火蚁种群后,药剂在土壤和草样中的残留动态。【结果】结果表明4.5%高效氯氰菊酯乳油2 000倍液在土壤中的原始沉积量分别是1.903 mg/kg,草坪草上的沉积量为7.806 mg/kg。在土壤中的半衰期为6.31 d,在草样中的半衰期为4.86 d。0.096%氟虫腈粉剂30 g/巢在土壤中的原始沉积量分别是0.073 mg/kg,草坪草上的沉积量为0.135 mg/kg;在土壤中的半衰期为5.57 d,在草样中的半衰期为2.96 d。0.015%多杀菌素35 g/巢施用后,未检测出土壤中有多杀菌素的残留。【结论】残留测定结果表明高效氯氰菊酯乳油和0.096%氟虫腈粉剂在施用后,一段时间内会在草坪上有残留,从而导致对草坪上的非靶标节肢动物造成伤害,而施用0.015%多杀菌素饵剂则不会对节肢动物群落产生较大的影响。
【Objective】 The main control methods of Solenopsis invicta are chemoprophylaxis. Understanding the residue dynamics of the commonly used pesticides in Sputum ants in the green space will help us to make proper use of the agents. 【Method】 The determination methods of common pesticide residues in Solenopsis invicta were established by gas chromatography. The residue dynamics of Sputum ants in soil and grass samples after the control of Solenopsis invicta Buren populations were determined. 【Result】 The results showed that the initial sediment contents of 4.5% beta-cypermethrin 2000 in soil were 1.903 mg / kg and 7.806 mg / kg respectively. The half-life in soil was 6.31 days and that in grass samples was 4.86 days. The initial deposition of 0.096% fipronil at 30 g / nest was 0.073 mg / kg in soil and 0.135 mg / kg on turfgrass respectively. The half-life in soil was 5.57 days. Half-life of 2.96 d. 0.015% Spinosaccharides 35 g / nest after application, did not detect spinosad residues in the soil. 【Conclusion】 The results of the residue assay showed that after the application of beta-cypermethrin oil and 0.096% fipronil powder, there were residues on the lawn for a period of time, which resulted in damage to non-target arthropods on the lawn. However, application of 0.015% Vegetarian bait will not have a greater impact on arthropod communities.