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Comprehensive Evaluation on Control Efficiency of Boscalid to Botrytis cinerea on Cucumber |
TANG Ming1,2,JIN Zhi-wen2,XIE Xue-wen2,CHAI A-li2,SHI Yan-xia2*,LI Bao-ju2* |
1Plant Protection College,Shenyang Agricultural University,Shenyang 110866,Liaoning,China;2Institute of Vegetables and Flowers,Chinese Academy of Agricultural Sciences,Beijing 100081,China |
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Abstract The resistance background of 6 strains of Botrytis cinerea isolated from cucumber to 6 different kinds of fungicides were examined by mycelium growth rate method,suggesting that their resistant levels to Boscalid were different. The control efficiency of 50% Boscalid WDG on cucumber gray mould was evaluated through potted experiments combined with field trials. In the potted experiments,the control efficiency of 50% Boscalid WDG on 2 strains of Botrytis cinerea with low resistant level were 53.49% and 53.04%,respectively.And the control efficiency of 50% Boscalid WDG on 3 strains of Botrytis cinerea with high resistant level were 50.16%,51.67%,32.24%,respectively. The results showed that Boscalid activity was heavily influenced by the continuously rising of Botrytis cinerea resistance. In the field trials of 2013 and 2014,the control efficiency of 50% Boscalid WDG,at the dosage of 5 625 g·hm-2,were 94.34%,90.39% respectively. Both 50% Boscalid WDG and 50% Procymidone WP could inhibit Botrytis cinerea effectively at the dosage of 4 500 g·hm-2. In summary,Boscalid could control the gray mould on cucumber effectively.
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Received: 17 April 2015
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