Experiment on Infection Regularity of Fruit Rot of Kiwifruit and Control

Experiments were conducted on infection regularity of fruit rot on Kiwifruit by Phomopsis sp.with fruit bagging and on toxicity of eight fungicides against the pathogen was determined by mycelial growth rate in laboratory.The results showed that infection started about three weeks after blossom fall and the heaviest infection was about six weeks after blossom fall.The experiments on fungi toxicity indicated that EC50 of hexaconazole ME and prochloraz-manganese chloride complex WP reached 0.068 and 0.105 μg/mL,indicating the highest inhibitive effect against Phomopsis sp,EC50of difenoconazole WG,thiophanate-Methyl WP,and diniconazole WP,were 0.224,0.307,0.426 μg/mL.EC50of Mancozeb WP,chlorothalonil WP,and triadimefon EC were 7.862,36.65 and 99.04 μg/mL,showing less control effects.