The Sublethal Effects of β-Ecdysterone, a Highly Active Compound from Achyranthes bidentata Blume, on Grape Phylloxera, Daktulosphaira vitifoliae FitchReport as inadecuate




The Sublethal Effects of β-Ecdysterone, a Highly Active Compound from Achyranthes bidentata Blume, on Grape Phylloxera, Daktulosphaira vitifoliae Fitch - Download this document for free, or read online. Document in PDF available to download.

Grape phylloxera, Daktulosphaira vitifoliae Fitch Hemiptera, Phylloxeridae, is a very destructive insect pest of grapevines. Intercropping of Achyranthes bidentata Blume f. Amaranthaceae and Vitis spp. grapevines can be useful to control this pest. In the present study, the toxicity of 22 compounds, known to be present in A. bidentata, to grape phylloxera was evaluated. All treatments were toxic towards grape phylloxera but the degree of toxicity differed between treatments. Among the 22 tested compounds, several of which proved toxic towards grape phylloxera. However β-ecdysterone had higher toxic effects against grape phylloxera, with LC50 values of 175.73 mg a.i. liter-1. In addition, we assessed the sublethal effects of LC10, LC20 and LC40 of β-ecdysterone on grape phylloxera. The fourth instar and adult developmental periods and total life span were significantly prolonged by LC40 of β-ecdysterone. Fecundity decreased when grape phylloxera were exposed to LC20 and LC40 of β-ecdysterone. In addition, LC40 of β-ecdysterone decreased the intrinsic rate of increase rm and the finite rate of increase λ and prolonged the population doubling time DT. The net reproductive rate R0 was significantly reduced by both the LC20 and LC40 β-ecdysterone treatments. Our results demonstrated that β-ecdysterone had higher toxic effects and significant sublethal effects on grape phylloxera, and showed potential control of grape phylloxera.



Author: Yongqiang Liu, Fuqian Yang, Hongtie Pu, Junping Su, Zongjiang Liu, Khalid Hussain Dhiloo, Zhongyue Wang

Source: http://plos.srce.hr/



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