鲍曼菌素对梨轮纹病病菌的毒力及其药效评价

Eavaluation of fungitoxicity of Acinetobacter baumannii against pear perennial canker on pear in laboratory and in field

采用菌丝生长速率法测定鲍曼菌素对梨轮纹病病菌的毒力,并进行田间药效试验。结果表明：鲍曼菌素对梨轮纹病菌菌丝生长抑制EC50为0.022 mg/L;Mg^2＋、Ca^2＋、Mn^2＋与鲍曼菌素混用,对梨轮纹病菌菌丝生长有显著的抑菌增效作用,其中Ca^2＋的抑菌增效作用显著高于Mg^2＋和Mn^2＋,且Mg^2＋显著高于Mn^2＋。鲍曼菌素226-500 mg/L对采收期和贮藏期梨轮纹病防效分别为74.56%-80.67%和69.51%-75.72%,且对梨树生长安全。

Based on mycelial growth rate,the fungitoxicity of Acinetobacter baumannii against Botryosphaeria berengeriana de.Not.f.sp.Piricola（Nose） Koganecawa et.Sokwwwa was assessed and the field trial efficacy of pyrimethanil in controlling the pear perennial canker was evaluated.The results showed that the EC50 of Acinetobacter baumannii of crude product to pear perennial canker was 0.022 mg/L.And adding Mg2＋,Ca2＋,Mn2＋ to pear perennial canker had significant synergy.The metal ions in the antibacterial synergism Ca2＋ were significantly higher than Mg2＋ and Mn2＋,and Mg2＋ was much higher than Mn2＋.The efficacy of 226-500 mg/L Acinetobacter baumannii was 74.56 %-80.67 % and 69.51 %-75.72 % for the pear perennial canker both in harvest time and in storage period,which was also safe to pear trees.