【摘要】 采用菌丝生长速率法测定了10种植物不同部位的70%乙醇提取物对黄瓜炭疽病菌(Colletotrichum lagenarium)的抑菌效果,其中,茄子(Solanum melongena L.)茎叶与辣椒(Capsicum annuum Linn)茎叶的乙醇提取液均具有显著的抑菌作用。当浓度为20mg/mL时,其抑制率分别为72.86%、72.57%,EC50依次为6.962 7mg/mL、8.254 0mg/mL。而其它植物提取液均无明显抑菌效果,抑菌率都在50%以下;对上述2种植物提取液进行室内苗期盆栽浓度梯度试验,当浓度为16mg/mL时,喷药7d后对黄瓜炭疽病的防治效果分别为72.97%和71.08%,EC50依次为6.757 6mg/mL和8.619 0mg/mL,此结果进一步证实了茄子茎叶与辣椒茎叶提取液对黄瓜炭疽病菌的具有显著的抑制效果。可见,对来源于农业废弃物的两种植物材料,进一步深入研究将会有广阔的应用前景,也会带来良好的社会与生态效益。更多还原

【Abstract】 The inhibition activity of different tissues extracts of 10 plants against Colletotrichum Lagenarium were determined by mycelial growth rate methods.The results showed that 70% ethanol extracts of Solanum melongena L.and Capsicum annuum Linn with a level of 20 mg/mL had significant inhibiting activities against C.Lagenarium,and the inhibition rate was 72.86% and 72.57%,and their EC50 was 6.962 7 mg/mL and 8.254 0 mg/mL,respectively.However,the ethanol extracts of other plants didn′t have an obvious inhibiting effect with the inhibiting rates which were less than 50%.The control effect of the S.melongena and C.annuum extracts against the disease caused by C.Lagenarium was further confirmed at the seedling stage through pot culture experiment.The control efficacities were 72.97% and 71.08% at the 7th day after the extracts were sprayed,and their EC50 were 6.757 6 mg/mL and 8.619 0 mg/mL,respectively.S.melongenaand C.annuum are wastes from the process of agriculture production,which are valuable for economic and environment,and deserve further development.更多还原