The presence of Rickettsia is associated with increased susceptibility of Bemisia tabaci (Homoptera: Aleyrodidae) to insecticides

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The presence of Rickettsia is associated with increased susceptibility of Bemisia tabaci (Homoptera: Aleyrodidae) to insecticides

Year: 

2008

Source of publication :

Pest Management Science

Authors :

גוטליב, יובל

;

גנאים, מוראד

;

צחורי-פיין, עינת

;

קונצדלוב, סבטלנה

.

Volume :

Co-Authors: 

Kontsedalov, S., Department of Entomology, Institute of Plant Protection, Volcani Centre, Bet Dagan 50250, Israel
Zchori-Fein, E., Department of Entomology, Institute of Plant Protection, Newe-Ya'ar Research Centre, Ramat-Yishai 30095, Israel
Chiel, E., Department of Entomology, Institute of Plant Protection, Newe-Ya'ar Research Centre, Ramat-Yishai 30095, Israel, Department of Evolutionary and Environmental Biology, University of Haifa, Haifa 31905, Israel
Gottlieb, Y., Department of Entomology, Institute of Plant Protection, Volcani Centre, Bet Dagan 50250, Israel
Inbar, M., Department of Evolutionary and Environmental Biology, University of Haifa, Haifa 31905, Israel
Ghanim, M., Department of Entomology, Institute of Plant Protection, Volcani Centre, Bet Dagan 50250, Israel

From page: 

789

To page: 

792

(

Total pages: 

4

)

Link :

The presence of Rickettsia is associated with increased susceptibility of Bemisia tabaci (Homoptera: Aleyrodidae) to insecticides

Abstract: 

BACKGROUND: The presence of certain symbiotic microorganisms may be associated with insecticide resistance in insects. The authors compared the susceptibility of two isofemale lines, Rickettsia-plus and Rickettsia-free, of the sweet potato whitefly Bemisia tabaci (Gennadius) (Homoptera: Aleyrodidae) to major insecticides from different chemical groups, including imidacloprid, acetamiprid, thiamethoxam, pyriproxyfen, spiromesifen and diafenthiuron. RESULTS: While the Rickettsia-plus and Rickettsia-free lines showed no differences in their susceptibility to imidacloprid and diafenthiuron, higher susceptibility of the Rickettsia-plus line to acetamiprid, thiamethoxam, spiromesifen and especially pyriproxyfen was observed. LC90 values indicated that the Rickettsia-free line was 15-fold more resistant to pyriproxyfen than the Rickettsia-plus line. CONCLUSION: Findings indicate that the infection status of B. tabaci populations by Rickettsia is an important consideration that should be taken into account when performing resistance monitoring studies, and may help in understanding the dynamics of B. tabaci resistance, symbiont-pest associations in agricultural systems and the biological impact of Rickettsia on whitefly biology. © 2008 Society of Chemical Industry.