Inhibitory Effect of Extracts from 22 Plants Against Sphaerothecafuliginea on Cucumber

doi:10.7668/hbnxb.2007.S1.004

Abstract

Abstract: The inhibiting effects of extracts from 22 plant species to Sphaerotheca f uliginea were tested on cucumberseedlings with two cotyledons each.The results showed that extracts from 8 plant species were more inhibitory to S. fuligineathan the others, with EC₅₀ lower than 0. 5%. Among the 8 extracts, the preventive effects of 6 plant extracts exceptArtemisia capillaries and Portulaca oleracea were higher than their curative effects.The preventive effects of 1. 25%extractfrom the 8 plants were higher than that( 74. 42%) of 100 ??g/mL triadimefon. 1. 25% extract from Cortex phellodendri , P .cablin , Portulaca oleracea, Fructus cnidii and Kadsura japonic exhibited the curative effect of as high as 82% to S . fuliginea,higher than that( 78. 89%) of 100 ??g/ mL triadimefon. It indicated the 8 plant extracts can be used for effective controllingof cucumber powdery mildew at the initial stage of cucumber powdery mildew or before the disease occurs.

Key words: Plant extracts, Sphaerotheca fuliginea, Inhibit ion effects, Preventive effect, Curative effect

CLC Number:

S436.421

HANXiu-ying, WANGWen-qiao, ZHANGXiao-feng, MAZhi-qiang, LIHong-xia. Inhibitory Effect of Extracts from 22 Plants Against Sphaerothecafuliginea on Cucumber[J]. ACTA AGRICULTURAE BOREALI-SINICA, doi: 10.7668/hbnxb.2007.S1.004.

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