The Analysis on the Field Tests of Several Kinds of Fungicides for Controlling Downy Mildew of Cucumber

Experiment result showed that 72.2% prapamocarb hydrochloride AS、64% oxadixyl mancozeb WP、72% cymoxanil mancozeb WP、47% kasugamycin hydrochloride WP和70% propined WP were effective fungicides for controlling downy midew of cucumber.Among those fungicides 72.2% prapamocarb hydrochloride AS had best controlling effect,after 3 times spraying,the controlling effect reached 97.89%,which was significantly higher than other fungicides.The controlling effect of 72% cymoxanil mancozeb WP,47% kasugamycin hydrochloride WP and 70% propined WP were 94.08%,89.4%and 87.88%respectively.