加工型辣椒细菌性叶斑病病原菌生物学特性及抑菌药剂筛选

研究了新疆加工型辣椒细菌性斑点病病原菌Pseudomonas syringae pv .syringae 的部分生物学特征,并采用室内平板抑菌和盆栽试验对6种杀菌剂的防病效果进行了测定和筛选.结果表明,辣椒细菌性斑点病病原菌最适合生长的培养基为BPA培养基.25~30℃为适宜生长温度,最适温度为28℃.适宜在 pH6.5~8.0环境中生长,最适 pH 值为7.病原菌在1％ NaCl浓度下生长良好,大于4％ NaCl 生长受抑制.供试药剂的室内平板抑菌效果为：可杀得2000＞乙酸铜＞链霉素＞志信101＞红星-2氢氧化铜＞志信2000,可杀得2000和乙酸铜的EC50值分别为5.954 mg/L和7.439 mg/L.盆栽试验结果显示,在发病前保护性喷施各药剂的防病效果（43.34％~80.84％）优于发病后治疗性施药（12.35％~49.54％）,其中可杀得2000和红星-2氢氧化铜的防治效果较好.

Biological Characteristics and Screening of Bactericides Against Bacterial Leaf Spot Pathogen on Processing Pepper

The experiment studied the biological characteristics and evaluation the control effect of several kinds of fungicide against processing pepper bacterial spot disease of Xinjiang.The results showed that Pseudomonas syringae pv.syringae is most suitable for growing medium-BPA medium,growing range of temperature is 25-30 ℃,the optimum temperature was 28 ℃,which grows in pH range of 6.5 to 8.0,the optimal pH value of 7.The pathogen grows well under 1% NaCl,when more than 4% NaCl,its growth was inhibited.Invitro experiment showed that Kocide2000＆gt; Copper acetate＆gt;Streptomyci〉Copper Hydrox-ide101＆gt;Cupic Hydroxide＆gt; Copper Hydroxide2000.Kocide 2000 and Copper acetate EC50 values were 5.954 mg/L and 7.439 mg/L,Greenhouse tests showed that the control effect of protective spraying （43.34%-80.84%）is better than the control effect of therapeutic spraying（12.35%-49.54%）,of which Kocide2000 and Cupic Hydroxide have better control effect.