[Effects of alcohol extracts from three kinds of biomass energy plant tissues on biological activity of Bemisia tabaci].
To test the feasibility of using raw extracts from the tissues of biomass energy plants Ricinus communi and Kosteletzkya virginica as plant protection agents, the alcohol extracts from R. communi seed and leaf and from K. virginica leaf were used to treat adult Bemisia tabaci by spraying. The glutathione S-transferase and carboxylesterase activities in B. tabaci body were measured after treated for 4 h, 24 h, 48 h, 72 h, and 96 h, and the olfaction responses of B. tabaci to the alcohol extracts were detected with a Y-tube olfactomet. All the three alcohol extracts obviously inhibited the glutathione S-transferase and carboxylesterase activities in a concentration-dependent manner. The inhibitory effect of the 250-times diluted alcohol extracts on the two enzyme activities was equivalent to that of 3000 times-diluted 1.8% avermectins. In addition, the 250-times diluted alcohol extracts had obvious repellent effect on B. tabaci, with the repellent coefficient of the alcohol extracts from R. communi seed and leaf and from K, virginica leaf being 100.0%, 96.7%, and 79.4%, respectively. All of these suggested that the test three alcohol extracts had repellent and other biological effects on B. tabaci.
Zhou
Fu-cai
FC
School of Horticulture and Plant Protection, Yangzhou University, Yangzhou 225009, Jiangsu, China. fczhou@yzu.edu.cn
Zhou
Gui-sheng
GS
Li
Chuan-ming
CM
Yang
Yi-zhong
YZ
Qin
Pei
P
D000818:Animals; D043182:Carboxylesterase / Q000378:metabolism; D018556:Crops, Agricultural / Q000469:parasitology; D005982:Glutathione Transferase / Q000378:metabolism*; D006430:Hemiptera / Q000187:drug effects* / Q000201:enzymology; D007302:Insect Repellents / Q000494:pharmacology*; D010936:Plant Extracts / Q000494:pharmacology*; D012278:Ricinus / Q000737:chemistry*
D007302:Insect Repellents; D010936:Plant Extracts; D005982:Glutathione Transferase; D043182:Carboxylesterase