摘要
以申嗪霉素原药为基础,分别与NaOH、KOH、NH3、异丙胺盐配制成水溶性液剂,并试验各配方的稳定性、室内毒力,筛选出申嗪霉素异丙胺盐可溶性液剂,进行田间防治水稻纹枯病试验。结果表明,经冷储藏、热储藏与常温储藏后,4种可溶性液剂在常温下储存稳定,申嗪霉素异丙胺盐、申嗪霉素铵盐、申嗪霉素钾盐和申嗪霉素钠盐在常温储藏下的降解率分别为0.82%、1.64%、1.41%和1.49%。申嗪霉素异丙胺盐、铵盐、钾盐和钠盐4种水溶性液剂及申嗪霉素原药对水稻纹枯病菌(Rhizoctonia solani)的室内毒力EC50分别为19.9940、21.4899、23.9536、23.9535、19.2354μg/mL。田间试验结果表明,申嗪霉素异丙胺水溶性液剂用量为1050 g/hm^(2)时,对田间水稻纹枯病的防治效果最高,达84.35%,优于1%申嗪霉素悬浮剂。
Phenazine-1-carboxylic acid(PCA)was prepared into water-soluble liquids with NaOH,KOH,NH3 and isopropyl⁃amine,respectively,and the stability and indoor toxicity of each formulation were tested.The soluble liquids of PCA isopropylamine salt were screened out,then the field trial of rice sheath blight control was carried out.The results showed that after cold storage,hot storage and room temperature storage,the 4 soluble liquids were the most stable in storage at room temperature.The degradation rates of PCA isopropylamine salt,PCA ammonium salt,PCA potassium salt and PCA sodium salt were 0.82%,1.64%,1.41%and 1.49%,which respectively had good stability.The EC50 of four water-soluble preparations of PCA isopropylamine salt,ammonium salt,potas⁃sium salt,sodium salt and PCA original drug to control the mycelia of Rhizoctonia solani were 19.9940,21.4899,23.9536,23.9535,19.2354μg/mL.Field test results showed that when the dosage of the preparation was 1050 g/hm^(2),the water-soluble solution of shen⁃zinomycin and isopropylamine had the highest control effect against rice sheath blight in the field,reaching 84.35%,which was better than the 1%PCA suspension agent.
作者
王锦鹏
余迪雅
王理想
李俊凯
WANG Jin-peng;YU Di-ya;WANG Li-xiang;LI Jun-kai(College of Agronomy,Yangtze University,Jingzhou 434025,Hubei,China;Institute of Pesticides,Yangtze University,Jingzhou 434025,Hubei,China)
出处
《湖北农业科学》
2021年第16期98-100,112,共4页
Hubei Agricultural Sciences
基金
国家重点研发计划项目(2018YFD0200500)
国家自然科学基金项目(31672069)。
