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- W2389983398 abstract "The inhibition activity of different tissues extracts of 20 plants ag ainst Pseudoperonospora cubensis were tested by the leaf discs tests. The result s showed that the extracts of the whole plant Polygonum hydropiper L.,the leaf of Albizia julibrissin Durazz. and the stem of Photinia serrulata Lindl. had a g ood inhibition effect of 98.33%,100.00%and 100.00%,respectively. The other plant extracts didn't have any inhibition effect. The pot tests of these three p lant extracts showed that their control effects at 7 days were 54.19%,78.93%a nd 62.00%,respectively. The field tests showed that their control effects at 7 days were 48.84%,27.91%and 25.57%,respectively. The methanol extract of th e stem of P. serrulata,which had the best control effect,was extracted with pe troleum ether,ethyl acetate and n-butyl alcohol. The leaf discs tests showed t hat the active fraction existed in n-butyl alcohol and water,and their control effects were 100.00%and 87.87%at the concentration of 30mg·ml-1." @default.
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- W2389983398 date "2005-01-01" @default.
- W2389983398 modified "2023-09-26" @default.
- W2389983398 title "Preventive Effect of 20 Plant Extracts against Cucumber Downy Mildew" @default.
- W2389983398 hasPublicationYear "2005" @default.
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