丁子香酚对黄瓜疫霉菌的室内毒力测定

黄瓜疫霉病是一种严重危害黄瓜生产的土传病害,筛选对黄瓜疫霉菌有强烈抑制作用的药剂是防治黄瓜疫霉病的主要方法.通过菌丝生长速率法,比较了丁子香酚和嘧肽霉素对黄瓜疫霉菌,以及丁子香酚对黄瓜疫霉菌和稻瘟病菌的室内毒力.对于黄瓜疫霉菌,丁子香酚的效果优于嘧肽霉素,EC50值分别为0.622 3和20.673 9 mg/L.而在使用丁子香酚的情况下,对稻瘟病菌的防治效果又好于对黄瓜疫霉菌,其EC50值为0.469 7 mg/L.

Indoor Toxicity Test of Eugenol etc.against Phytophthora melonis

Phytophthora melonis is a soil-borne disease which will seriously damage the production of cucumber.Screen of the fungicides that had evident inhibitory effect against Phytophthora melonis is a main way to prevent and control the disease.By the mycelium growth rate method,the toxicity of eugenol and cytosinpeptidemycin on Phytophthora melonis and eugenol on Phytophthora melonis and Magnaporthe grisea were tested.The results showed that in comparison with cytosinpeptidemycin,eugenol had better inhibitory effect on Phytophthora melonis,the EC50 value of eugenol and cytosinpeptidemycin on Phytophthora meloniswere 0.622 3 and 20.673 9 mg/L,respectively;the inhibitory effect of eugenol on Magnaporthe grisea was better than that on Phytophthora melonis,the EC50 value of eugenol on Magnaporthe grisea was 0.469 7 mg/L.