硅藻土对德国小蠊成虫和若虫的杀虫效果。
The insecticidal effect of diatomaceous earth against adults and nymphs of Blattella germanica.
作者信息
Hosseini Seyyed Akbar, Bazrafkan Sahar, Vatandoost Hassan, Abaei Mohammad Reza, Ahmadi Mussa Soleimani, Tavassoli Maryam, Shayeghi Mansoreh
机构信息
Medical Entomology and Vector Control Department, Faculty of Health, Tehran University of Medical Sciences, Tehran, Iran.
Medical Entomology and Vector Control Department, Faculty of Health, Bandar Abbas University of Medical Sciences, Bandar Abbas, Iran.
出版信息
Asian Pac J Trop Biomed. 2014 May;4(Suppl 1):S228-32. doi: 10.12980/APJTB.4.2014C1282.
OBJECTIVE
To evaluate the insecticidal effect of diatomaceous earth (DE) against adults and nymphs of Blattella germanica.
METHODS
This cross sectional study has been done on the laboratory strain of German cockroaches. Two stages, nymph and adult, were exposed to six dose rates of the DE, 2.5, 5, 10, 15, 20 and 25 g/m(2), at 24, 48 and 72 h exposure period. Mortality (number of dead cockroaches) was assessed after 24 h. Other exposed specimens were transferred to the beakers contained food and water for counting the retard mortality rate after 1 week.
RESULTS
Increasing in dose rates of DE increased mortality rate, so that the lowest and highest mortality rates were observed in 2.5 and 25 g/m(2), respectively. The results of the statistical analysis showed no significant difference in the lethality of 50% of DE plus water on the German cockroach nymphs.
CONCLUSIONS
Due to the resistance of German cockroach against organochloride, organophosphorus, carbamate and pyrethriodes insecticides, it is suggested to use DE for insect's control.
目的
评估硅藻土对德国小蠊成虫和若虫的杀虫效果。
方法
本横断面研究针对德国小蠊实验室品系开展。若虫和成虫两个阶段的德国小蠊被暴露于六种剂量率的硅藻土，即2.5、5、10、15、20和25克/平方米，暴露时间分别为24、48和72小时。24小时后评估死亡率（死亡蟑螂数量）。其他暴露的标本被转移到装有食物和水的烧杯中，1周后计算延迟死亡率。
结果
硅藻土剂量率增加，死亡率上升，最低和最高死亡率分别出现在2.5克/平方米和25克/平方米时。统计分析结果显示，50%硅藻土加水对德国小蠊若虫的致死率无显著差异。
结论
鉴于德国小蠊对有机氯、有机磷、氨基甲酸酯和拟除虫菊酯类杀虫剂具有抗性，建议使用硅藻土进行虫害防治。
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