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פותח על ידי קלירמאש פתרונות בע"מ -
Reversal of resistance to pyriproxyfen in the Q biotype of Bemisia tabaci (Hemiptera: Aleyrodidae)
Year:
2007
Source of publication :
Pest Management Science
Authors :
גנאים, מוראד
;
.
הורוביץ, רמי
;
.
Volume :
63
Co-Authors:

Wilson, M., Department of Entomology, Faculty of Agriculture, Hebrew University of Jerusalem, Rehovot 76100, Israel
Moshitzky, P., Department of Entomology, Faculty of Agriculture, Hebrew University of Jerusalem, Rehovot 76100, Israel
Laor, E., Department of Entomology, Faculty of Agriculture, Hebrew University of Jerusalem, Rehovot 76100, Israel
Morin, S., Department of Entomology, Faculty of Agriculture, Hebrew University of Jerusalem, Rehovot 76100, Israel

Facilitators :
From page:
761
To page:
768
(
Total pages:
8
)
Abstract:
Pyriproxyfen, a juvenile hormone (JH) mimic, is a biorational insecticide that disrupts insect development. It is one of the principal insecticides being used to control Bemisia tabaci (Gennadius) on cotton, and has many environmentally positive attributes that make it compatible with integrated pest management (IPM) programs. In Israel, a high level of resistance to pyriproxyfen has been observed in several isolated regions. Here, tests were conducted to establish whether temporal refuges from exposure to pyriproxyfen could be useful for restoring the effectiveness of the compound. Resistance was found to decrease by a factor of 8 when exposure to pyriproxyfen was ceased for 13 generations. Reversal of resistance was accompanied with increased biotic fitness of the revertant colony. By incorporating experimental estimates of nymph survival, sex ratio, fecundity, egg hatching rate and developmental time, the seasonal cost per generation for resistant insects was estimated to be 25%. A genetic simulation model, optimized by empirical data from bioassays, predicted fitness cost per generation of 19% for resistant homozygous (RR) females and hemizygous (R) males, and produced rates of reversal similar to the experimental results. The model also predicted that, even after 5 years (∼ 55 generations) without pyriproxyfen treatments, the frequency of the resistance allele (R) will still remain high (0.02). It is therefore concluded, on the basis of experimental and modeling results, that the effectiveness of temporal refuges for reversing development of resistance to pyriproxyfen in B. tabaci may be limited. © 2007 Society of Chemical Industry.
Note:
Related Files :
Animal
Animals
Bemisia tabaci
computer simulation
Female
Genetics
integrated pest management
Male
pesticide resistance
עוד תגיות
תוכן קשור
More details
DOI :
10.1002/ps.1403
Article number:
0
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
31843
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 01:05
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Scientific Publication
Reversal of resistance to pyriproxyfen in the Q biotype of Bemisia tabaci (Hemiptera: Aleyrodidae)
63

Wilson, M., Department of Entomology, Faculty of Agriculture, Hebrew University of Jerusalem, Rehovot 76100, Israel
Moshitzky, P., Department of Entomology, Faculty of Agriculture, Hebrew University of Jerusalem, Rehovot 76100, Israel
Laor, E., Department of Entomology, Faculty of Agriculture, Hebrew University of Jerusalem, Rehovot 76100, Israel
Morin, S., Department of Entomology, Faculty of Agriculture, Hebrew University of Jerusalem, Rehovot 76100, Israel

Reversal of resistance to pyriproxyfen in the Q biotype of Bemisia tabaci (Hemiptera: Aleyrodidae)
Pyriproxyfen, a juvenile hormone (JH) mimic, is a biorational insecticide that disrupts insect development. It is one of the principal insecticides being used to control Bemisia tabaci (Gennadius) on cotton, and has many environmentally positive attributes that make it compatible with integrated pest management (IPM) programs. In Israel, a high level of resistance to pyriproxyfen has been observed in several isolated regions. Here, tests were conducted to establish whether temporal refuges from exposure to pyriproxyfen could be useful for restoring the effectiveness of the compound. Resistance was found to decrease by a factor of 8 when exposure to pyriproxyfen was ceased for 13 generations. Reversal of resistance was accompanied with increased biotic fitness of the revertant colony. By incorporating experimental estimates of nymph survival, sex ratio, fecundity, egg hatching rate and developmental time, the seasonal cost per generation for resistant insects was estimated to be 25%. A genetic simulation model, optimized by empirical data from bioassays, predicted fitness cost per generation of 19% for resistant homozygous (RR) females and hemizygous (R) males, and produced rates of reversal similar to the experimental results. The model also predicted that, even after 5 years (∼ 55 generations) without pyriproxyfen treatments, the frequency of the resistance allele (R) will still remain high (0.02). It is therefore concluded, on the basis of experimental and modeling results, that the effectiveness of temporal refuges for reversing development of resistance to pyriproxyfen in B. tabaci may be limited. © 2007 Society of Chemical Industry.
Scientific Publication
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