几种杀菌剂对柑桔溃疡病的生物活性

Bioactivity of Several Bactericides against Xanthomonas campestris pv.citri

为筛选防治柑桔溃疡病的有效药剂,按大田推荐使用浓度,用抑菌圈法测定17种非铜药剂和5种含铜药剂对柑桔溃疡病的毒力,并研究7种非铜药剂田间防治效果。结果表明,代森锰锌、福美双、福美双.溴菌腈、农用链霉素、金核霉素和琥胶肥酸铜.乙磷铝.硫酸锌抑菌作用最强,其次为福美双.福美锌、大蒜素、络氨铜.络氨锌和盐酸吗啉胍.乙酸铜,过氧乙酸、噻唑锌、春雷菌素、中生菌素、琥珀酸铜和噻菌铜有微弱的抑菌作用,百菌清、多菌灵、苯醚甲环唑、叶青双、复硝酚钠和井冈霉素无抑菌作用。大田试验结果表明,30%金核霉素WP 500 mg/L和72%农用链霉素WP 200 mg/L处理对柑桔溃病的防效分别为76.34%和74.94%,显著优于其它药剂处理;80%代森锰锌WP 2000 mg/L、50%福美双WP 400 mg/L和50%福美双.溴菌腈WP 500 mg/L处理对柑桔溃病的防效分别为70.36%、66.55%和69.37%,与对照含铜药剂20%噻菌铜SC 67 mg/L处理无显著差异;大蒜素和叶青双对柑桔溃病防效较差,6%大蒜素EC 120 mg/L和20%叶青双WP 400 mg/L处理对柑桔溃病的防效分别为41.84%和21.82%,显著低于对照含铜药剂20%噻菌铜SC 67 mg/L处理。

In order to screen effective bactericides against Xanthomonas campestris pv.citri,the toxicity of 17 non-copper fungicides and 5 copper fungicides against the strain of X.campestris pv.citri in the greenhouse were determined by the method of inhibition zone,and the efficacy of 7 non-copper fungicides in the field was tested.The results showed that manzoceb,thiram,thiram-bromothalonil,agricultural streptomycin,aureonucleomycin and DT-fosetyl-aluminium-zinc sulfate had the strongest inhibitory effect on the pathogen,thiram-ziram,allicin,cupric tetramminosulfate-zinc tetramminosulfate and moroxydine hydrochloride-cupric acetate had relatively strong inhibitory effect,peracetic acid,Zn thiazole,Kasugamycin,Zhong shengmycin,succinic-glutaric-adipic and thiodiazole-copper had low inhibitory effect,chlorothalonil,carbendazim,difenoconazole,Bismerthiazol,Sodium nitrophenolate and Jinggangmycin had no inhibitory effect in the greenhouse.A field experiment,showed that the efficacies of aureonucleomycin 30% WP at 500 mg/L and agricultural streptomycin 72% WP at 200 mg/L on X.campestris pv.citri,were 76.34% and 74.94%,respectively,which were significantly higher than that of the other fungicide treatments.The efficacies of manzoceb 80% WP at 2000 mg/L,thiram 50% WP at 400 mg/L and thiram-bromothalonil 50% WP at 500 mg/L were 70.36%,66.55% and 69.37%,respectively,which were equivalent to that of the control medicament,thiodiazole-copper 20% SC at 67 mg/L.The efficacies of allicin 6% EC at 120 mg/L and bismerthiazol 20% WP at 400 mg/L were 41.84% and 21.82%,respectively,which were significantly lower than that of the control fungicides,thiodiazole-copper 20% SC at 67 mg/L.