摘要
在20℃和60%温湿度条件下,分别测定了氧硫化碳、异硫氰酸甲酯(Methyl isothiocyanate,MITC)等7种新型熏蒸剂对小麦网腥黑穗病菌(Tilletia caries(DC.)Tul.,TCT)的熏蒸效果。结果表明,除MITC外,其他6种熏蒸剂均不能完全杀灭TCT病菌;MITC熏蒸120h可有效杀灭TCT病菌,其LD90、LD95、LD99、LD99.9963分别为15.438、17.046、20.530、32.414g/m3。但是,由于小麦对MITC的高吸附性导致熏蒸剂空间浓度过低,使得有载物熏蒸试验中投药50、100g/m3MITC均未能有效杀灭小麦中的TCT病菌。残留检测结果表明,散气16d后小麦中MITC残留量分别降至0.29、1.07mg/kg,残留较高。结论:MITC对TCT有很好的杀灭效果,但由于小麦对MITC的吸附性很强,需进一步研究熏蒸方式,方可实际应用。
Fumigation with 7 kinds of new fumigants including carbonyl sulfide,methyl isothiocyanate et al on common bunt（Tilletia caries（DC.）Tul.,TCT）of wheat were performed at 20℃ and 60% humidity conditions.The results indicated that other six kinds of fumigants could not completely kill TCT except MITC.The applied doses of MITC to achieve 90%,95%,99%and 99.9963% mortality were 15.438,17.046,20.530 and 32.414 g/m3 respectively after 120 h fumigation.However,50 and 100 g/m3 MITC failed to kill TCT under the wheat loading tests,because there was a high adsorption of wheat and the concentration of MITC was too low during the fumigation.Residue analysis showed that methyl isothiocyanate residues finally declined to 0.29,1.07 mg/kg after 16-day aeration.Conclusion：MITC fumigation was effective to control TCT,but improved fumigation methods were required to overcome the high adsorption of wheat.
出处
《植物检疫》
北大核心
2010年第5期5-8,共4页
Plant Quarantine
基金
"十一五"国家科技支撑计划(2006BAD08A16)
关键词
小麦网腥黑穗病菌
异硫氰酸甲酯
毒力测定
残留
Tilletia caries（DC.）Tul.（TCT）
methyl isothiocyanate
toxicity test
residue
