2010•Unpublished venueRequires access
Toxicity and Field Efficiency of Several Fungicides against Phomopsis mollissima
Jiang Shu-xia
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Abstract
Phomopsis mollissima has been the seriously devastating diseases in chestnut in recent years.The laboratory toxicities of nine fungicides against P.mollissima Shear.were tested by mycelial growth rate method,and the EC50 values of tebuconazole,flusilazole,diniconazole,difenoconazole,prochloraz,mancozeb,prodion,chlorothalonil,thiophonate-methyl were 1.2384,2.2387,4.1926,5.5261,8.2450,91.8217,100.0491,201.5959,219.4009 mg/L.The field trials results showed that the control effect of tebuconazole 25% EW(500 mg/L),flusilazole 40% EC(167 mg/L),prochloraz 45% EW(333 mg/L),difenoconazole 10% WG(333 mg/L),thiophanatemethyl 70% WP(1 250 mg/L) and chlorothalonil 75% WP(1 250 mg/L) were 90.4,88.9,82.2,77.9,56.9 and 51.6% respectively,while the other fungicides had poor effects.