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采用熏蒸法和浸渍法测定了4种土壤熏蒸杀线剂和6种非熏蒸杀线剂对甘薯茎线虫的毒力,在此基础上以各药剂的致死中浓度剂量处理线虫,设置不同时间处理,观察了药剂对线虫的活性动态变化.结果表明:熏蒸杀线剂棉隆、1,3-二氯丙烯、威百亩、氯化苦对甘薯茎线虫的LC50依次为0.49、0.89、0.91、3.60mg·L-1,非熏蒸杀线剂甲维盐、阿维菌素、灭线磷、噻唑膦、涕灭威、丁硫克百威对甘薯茎线虫的LC50依次为31.2、48.1、224.3、288.4、632.3、823.9mg·L-1.致死中浓度处理线虫后,各药剂校正死亡率随处理时间延长有不同幅度升高,棉隆、1,3-二氯丙烯、阿维菌素和甲维盐对线虫有较高的持续抑制效果,处理48h脱离药剂处理后校正死亡率没有降低,而传统杀线剂品种灭线磷和涕灭威处理均出现线虫明显复苏的现象.表明棉隆、1,3-二氯丙烯、阿维菌素和甲维盐可以替代传统杀线剂应用于甘薯茎线虫的防治.
The fumigation and dipping methods were used to determine the toxicity of four soil fumigation and six non-fumigation nematicide to Ditylenchus destructor. On the basis of this, the nematodes were treated with the lethal dose of each drug, and different time treatments , The dynamic changes of the activity of the nematodes were observed.The results showed that the LC50 of fumigation nematodes, 1,3-dichloropropene, Viagra and chloropicrin to D. solani were 0.49,0.89,0.91, 3.50 mg · L-1, non-fumigation nematicide carbaryl, avermectin, exophthalocyanine, thiazolylphosphine, aldicarb, carbosulfan LC50 of D. solani were 31.2, 48.1, 224.3 , 288.4,632.3,823.9mg · L-1. After the lethal concentration of nematodes, the corrected mortality rate of each agent increased with the increase of treatment time. The contents of cottonseed, 1,3-dichloropropene, abamectin, A dimension of salt on nematodes have a sustained and inhibitory effect, 48h treatment after treatment without correction mortality did not reduce the traditional nematicide species of exophthalocyanine and aldicarb treatment showed significant nematode recovery phenomenon. , 1,3-Dichloropropene, Abamectin, and Emamectin Benzoate can replace traditional nematicides The prevention and treatment of sweet potato stem nematode.