20种植物提取物对芒果炭疽菌的抑制作用

研究了16科20种（其中12种为中草药）植物的丙酮提取物对芒果炭疽病菌株的抑制作用,初步分析了利用植物源农药解决芒果炭疽病抗药性问题的可能性.结果表明,同一药物在不同浓度下作用效果可能存在较大的差异.芒果炭疽病抗药性菌株对供试植物丙酮提取物没有明显的抗药性,100mg/mL（每mL含100mg干物质的提取物）浓度下石菖蒲、艾草、阳春砂、益智、飞机草等植物在芒果炭疽菌抗药性菌株室内试验中其作用效果明显优于1000 mg/L多菌灵,其中石菖蒲丙酮提取物对芒果炭疽病菌敏感菌株（ZJS）、抗药性菌株（ZJR）有效中浓度EC50分别为5.91,4.06 mg/mL,艾草丙酮提取物对芒果炭疽病菌敏感菌株（ZJS）、抗药性菌株（ZJR）有效中浓度EC50分别为9.24,14.53 mg/mL.

Effects of Twenty Plant Extracts on Inhibition of Colletotrichum gloeosporioides Penz. in Mango

The inhibitory effects of twenty plant extracts against Colletotrichum gloeosporioides Penz. in mango were tested. The possibility of several advantage ous plant extracts to control or reduce the damage of resistant C. gloeosporioid es was analyzed. The results showed that the inhibition rates of 100 mg/mL of Ac orus tatarinowii Schott., Artemisia indica Willd., Amomum villosum Lour., Alpini a oxyphylla Miq. and Chromolaena odoratum L. against the resistant C. gloeospori oides were 100.00 %, 87.14 %, 77.55 %, 73.47 % and 65.92 % respectively. The inh ibitory effects of the plant extracts against Colletotrichum gloeosporioides wer e better than those of the traditional chemical fungicide such as carbendazim (1 000 mg/L). The EC50 of A. tatarinowii against C. gloeosporioides was 4.06 ~ 5.9 1 mg/mL. The EC50 of A. indica against C. gloeosporioides was 9.24 ~ 14.53 mg/mL .