Rice sheath blight is one of the serious rice diseases causing economic losses worldwide.Shenqinmycin,a broad-spectrum microbial metabolite pesticide,inhibits plant pathogens.This study investigated the sensitivity of...Rice sheath blight is one of the serious rice diseases causing economic losses worldwide.Shenqinmycin,a broad-spectrum microbial metabolite pesticide,inhibits plant pathogens.This study investigated the sensitivity of rice sheath blight pathogen to the biological pesticide by treating 45 strains isolated from three northeastern provinces with varying concentrations of Shenqinmycin.The effects on mycelial growth and sclerotial germination of the rice sheath blight pathogens were measured to determine the resistance levels.The results indicated that all tested strains were sensitive to Shenqinmycin,with EC50 values for Rhizoctonia solani ranging from 0.0487 mg·L^(-1) to 0.2348 mg·L^(-1),and a sensitivity baseline of 0.1292 mg·L^(-1).For Rhizoctonias oryzae-sativae,the EC50 values ranged from 0.0517 mg·L^(-1) to 0.1697 mg·L^(-1),with a sensitivity baseline of 0.1163 mg·L^(-1).Shenqinmycin had no effect on the sclerotial germination of either pathogen,suggesting its potential as an effective agent for controlling rice sheath blight.展开更多
In recent years,the prevalence of rice sheath blight caused by Rhizoctonia solani has significantly increased in Heilongjiang Province.Chemical control has become the primary control method.To cope with this,a novel m...In recent years,the prevalence of rice sheath blight caused by Rhizoctonia solani has significantly increased in Heilongjiang Province.Chemical control has become the primary control method.To cope with this,a novel mycelium growth rate method was employed to assess the toxicity of 13 fungicides,including a combination of 45%prochloraz and 125 g·mL^(-1)epoxiconazole,against R.solani.Additionally,the resistance of 99 R.solani strains to thifluzamide across various regions was also evaluated.The findings indicated that 75%trifloxystrobin-tebuconazole exhibited the most effective inhibitory effect,with an effective inhibitory medium concentration(EC50)value of 0.0101μg·mL^(-1).The EC50 values for 20%prothioconazole,125 g·mL^(-1)epoxiconazole,24%thifluzamide,and 50%hexaconazole were all less than 10μg·mL^(-1),indicating a better inhibitory effect on R.solani.The strongest synergistic effect was noted in the mixture of prochloraz and epoxiconazole at a 1:2 ratio,resulting in an EC50 value of 2.9917μg·mL^(-1),and a co-toxicity coefficient of 213.38.Among the 34 strains from Harbin City,the average EC50 value was 196.9341μg·mL^(-1)indicating the highest susceptiblility to thifluzamide.Conversely,15 strains from Shuangyashan City exhibited an average EC50 value of 364.7323μg·mL^(-1),reflecting the lowest sensitivity to thifluzamide.The sensitivity baseline EC50 value for R.solani was 253.8854μg·mL^(-1),with an overall resistance level between 0.1567 and 3.3292,indicating that the resistance level of R.solani in Heilongjiang Province remained low.Therefore,R.solani was still sensitive to thifluzamide in most areas of Heilongjiang Province,but there was a certain risk of resistance in Qitaihe City,which needed to be continuously monitored.At the same time,this study might provide a theoretical foundation for enhancing the prevention and management of the rice sheath blight.展开更多
【目的】探究氟茚唑菌胺与苯醚甲环唑复配对水稻纹枯病室内活性及最佳混配比,进行田间药效试验验证其实际应用效果,为水稻纹枯病的防治提供新的策略。【方法】设置多个氟茚唑菌胺和苯醚甲环唑混配比,采用菌丝生长速率法进行室内毒力测定...【目的】探究氟茚唑菌胺与苯醚甲环唑复配对水稻纹枯病室内活性及最佳混配比,进行田间药效试验验证其实际应用效果,为水稻纹枯病的防治提供新的策略。【方法】设置多个氟茚唑菌胺和苯醚甲环唑混配比,采用菌丝生长速率法进行室内毒力测定,利用Wadley法计算增效系数SR,选取增效作用最显著的混配比进行田间药效试验,调查田间发病情况。【结果】氟茚唑菌胺:苯醚甲环唑以质量比1:9至9:1的配比范围混配时SR值介于0.7180~3.2735,其中复配比例为1:9时SR值达3.2735,增效作用最强。田间试验结果表明,90 g a.i./hm2的桶混处理即可与各供试化学药剂在推荐剂量下的防治效果持平,且显著优于4%井冈霉素A水剂的防效。【结论】田间用量为90 g a.i./hm2的氟茚唑菌胺与苯醚甲环唑(有效成分比为1:9)桶混处理能有效防治水稻纹枯病,氟茚唑菌胺与苯醚甲环唑复配使用在水稻纹枯病的防治中具有广阔的应用前景。展开更多
纹枯病是水稻主要病害,为明确新药剂40%丙硫菌唑·戊唑醇悬浮剂混配对水稻纹枯病的防治效果,文章以嘉67和秀水121为供试水稻品种,以10%井冈霉素A可溶性粉剂为对照药剂,进行了大田试验。结果表明,不同浓度新药剂40%丙硫菌唑·戊...纹枯病是水稻主要病害,为明确新药剂40%丙硫菌唑·戊唑醇悬浮剂混配对水稻纹枯病的防治效果,文章以嘉67和秀水121为供试水稻品种,以10%井冈霉素A可溶性粉剂为对照药剂,进行了大田试验。结果表明,不同浓度新药剂40%丙硫菌唑·戊唑醇悬浮剂混配9%吡唑醚菌酯微囊悬浮剂后,在2种水稻品种上均对水稻纹枯病有很好的防治效果,且在2种水稻品种中防治效果一致。不同浓度药剂试验均未见药害。从防治效果上看,50 mL新药剂40%丙硫菌唑·戊唑醇悬浮剂混配50 mL 9%吡唑醚菌酯微囊悬浮剂防治水稻纹枯病可以在当地推广应用。展开更多
小麦纹枯病是小麦生产的主要病害之一,受气候因素、耕作制度、致病病原菌等多重因素的影响。目前对小麦纹枯病的防治主要包括选育抗病品种、农业管理、化学防治和生物防治。本文收集了2019-2024年中国知网、Web of Science数据库中与小...小麦纹枯病是小麦生产的主要病害之一,受气候因素、耕作制度、致病病原菌等多重因素的影响。目前对小麦纹枯病的防治主要包括选育抗病品种、农业管理、化学防治和生物防治。本文收集了2019-2024年中国知网、Web of Science数据库中与小麦纹枯病防治有关的1819篇文章,根据所制定的筛选标准共获得满足条件的论文13篇。利用Excel对防治小麦纹枯病的化学农药、生物农药、生防菌等相关数据进行分类和整理,利用Meta分析对药剂的使用方式、药后不同时间、生物农药和化学农药等方面进行了整合分析。结果表明:实验数据异质性大,生物农药如贝莱斯芽孢杆菌LQ-3的防效与化学药剂酷拉斯相当;不同药剂拌种30 g/L苯醚甲环唑悬浮种衣剂和0.8%腈菌·戊唑醇种衣悬浮剂的防效分别为81%和80%,防效好;在施药后不同时间防效的分析中,37%井冈·蜡芽菌可湿性粉剂的防效为72%,防效最好。该研究为小麦纹枯病的综合防治提供了理论基础。展开更多
基金Supported by the Green Plant Protection Project(213010801)the Heilongjiang Provincial Key R&D Program Projects(20232X02B0502)。
文摘Rice sheath blight is one of the serious rice diseases causing economic losses worldwide.Shenqinmycin,a broad-spectrum microbial metabolite pesticide,inhibits plant pathogens.This study investigated the sensitivity of rice sheath blight pathogen to the biological pesticide by treating 45 strains isolated from three northeastern provinces with varying concentrations of Shenqinmycin.The effects on mycelial growth and sclerotial germination of the rice sheath blight pathogens were measured to determine the resistance levels.The results indicated that all tested strains were sensitive to Shenqinmycin,with EC50 values for Rhizoctonia solani ranging from 0.0487 mg·L^(-1) to 0.2348 mg·L^(-1),and a sensitivity baseline of 0.1292 mg·L^(-1).For Rhizoctonias oryzae-sativae,the EC50 values ranged from 0.0517 mg·L^(-1) to 0.1697 mg·L^(-1),with a sensitivity baseline of 0.1163 mg·L^(-1).Shenqinmycin had no effect on the sclerotial germination of either pathogen,suggesting its potential as an effective agent for controlling rice sheath blight.
基金Supported by the Green Plant Protection Project(213010801)the Heilongjiang Province Key Research and Development Plan Project(20232X02 B0502)the Natural Science Foundation of Heilongjiang Province(LH2022C022)。
文摘In recent years,the prevalence of rice sheath blight caused by Rhizoctonia solani has significantly increased in Heilongjiang Province.Chemical control has become the primary control method.To cope with this,a novel mycelium growth rate method was employed to assess the toxicity of 13 fungicides,including a combination of 45%prochloraz and 125 g·mL^(-1)epoxiconazole,against R.solani.Additionally,the resistance of 99 R.solani strains to thifluzamide across various regions was also evaluated.The findings indicated that 75%trifloxystrobin-tebuconazole exhibited the most effective inhibitory effect,with an effective inhibitory medium concentration(EC50)value of 0.0101μg·mL^(-1).The EC50 values for 20%prothioconazole,125 g·mL^(-1)epoxiconazole,24%thifluzamide,and 50%hexaconazole were all less than 10μg·mL^(-1),indicating a better inhibitory effect on R.solani.The strongest synergistic effect was noted in the mixture of prochloraz and epoxiconazole at a 1:2 ratio,resulting in an EC50 value of 2.9917μg·mL^(-1),and a co-toxicity coefficient of 213.38.Among the 34 strains from Harbin City,the average EC50 value was 196.9341μg·mL^(-1)indicating the highest susceptiblility to thifluzamide.Conversely,15 strains from Shuangyashan City exhibited an average EC50 value of 364.7323μg·mL^(-1),reflecting the lowest sensitivity to thifluzamide.The sensitivity baseline EC50 value for R.solani was 253.8854μg·mL^(-1),with an overall resistance level between 0.1567 and 3.3292,indicating that the resistance level of R.solani in Heilongjiang Province remained low.Therefore,R.solani was still sensitive to thifluzamide in most areas of Heilongjiang Province,but there was a certain risk of resistance in Qitaihe City,which needed to be continuously monitored.At the same time,this study might provide a theoretical foundation for enhancing the prevention and management of the rice sheath blight.
文摘【目的】探究氟茚唑菌胺与苯醚甲环唑复配对水稻纹枯病室内活性及最佳混配比,进行田间药效试验验证其实际应用效果,为水稻纹枯病的防治提供新的策略。【方法】设置多个氟茚唑菌胺和苯醚甲环唑混配比,采用菌丝生长速率法进行室内毒力测定,利用Wadley法计算增效系数SR,选取增效作用最显著的混配比进行田间药效试验,调查田间发病情况。【结果】氟茚唑菌胺:苯醚甲环唑以质量比1:9至9:1的配比范围混配时SR值介于0.7180~3.2735,其中复配比例为1:9时SR值达3.2735,增效作用最强。田间试验结果表明,90 g a.i./hm2的桶混处理即可与各供试化学药剂在推荐剂量下的防治效果持平,且显著优于4%井冈霉素A水剂的防效。【结论】田间用量为90 g a.i./hm2的氟茚唑菌胺与苯醚甲环唑(有效成分比为1:9)桶混处理能有效防治水稻纹枯病,氟茚唑菌胺与苯醚甲环唑复配使用在水稻纹枯病的防治中具有广阔的应用前景。
文摘纹枯病是水稻主要病害,为明确新药剂40%丙硫菌唑·戊唑醇悬浮剂混配对水稻纹枯病的防治效果,文章以嘉67和秀水121为供试水稻品种,以10%井冈霉素A可溶性粉剂为对照药剂,进行了大田试验。结果表明,不同浓度新药剂40%丙硫菌唑·戊唑醇悬浮剂混配9%吡唑醚菌酯微囊悬浮剂后,在2种水稻品种上均对水稻纹枯病有很好的防治效果,且在2种水稻品种中防治效果一致。不同浓度药剂试验均未见药害。从防治效果上看,50 mL新药剂40%丙硫菌唑·戊唑醇悬浮剂混配50 mL 9%吡唑醚菌酯微囊悬浮剂防治水稻纹枯病可以在当地推广应用。
文摘小麦纹枯病是小麦生产的主要病害之一,受气候因素、耕作制度、致病病原菌等多重因素的影响。目前对小麦纹枯病的防治主要包括选育抗病品种、农业管理、化学防治和生物防治。本文收集了2019-2024年中国知网、Web of Science数据库中与小麦纹枯病防治有关的1819篇文章,根据所制定的筛选标准共获得满足条件的论文13篇。利用Excel对防治小麦纹枯病的化学农药、生物农药、生防菌等相关数据进行分类和整理,利用Meta分析对药剂的使用方式、药后不同时间、生物农药和化学农药等方面进行了整合分析。结果表明:实验数据异质性大,生物农药如贝莱斯芽孢杆菌LQ-3的防效与化学药剂酷拉斯相当;不同药剂拌种30 g/L苯醚甲环唑悬浮种衣剂和0.8%腈菌·戊唑醇种衣悬浮剂的防效分别为81%和80%,防效好;在施药后不同时间防效的分析中,37%井冈·蜡芽菌可湿性粉剂的防效为72%,防效最好。该研究为小麦纹枯病的综合防治提供了理论基础。
