The cross-resistance to pyrethrins and eight synthetic pyrethroids, of an organophosphorus-resistant strain of the rust-red flour beetleTribolium castaneum(herbst)

1980 ◽  
Vol 11 (3) ◽  
pp. 331-340 ◽  
Author(s):  
C. John Lloyd ◽  
George E. Ruczkowski
Keyword(s):  
Resistant Strain ◽  
Cross Resistance ◽  
Synthetic Pyrethroids ◽  
The Cross

scholarly journals The cross-resistance patterns and biochemical characteristics of an imidacloprid-resistant strain of the cotton aphid

2015 ◽  
Vol 40 (2) ◽  
pp. 55-59 ◽  
Author(s):  
Xiaokun Chen ◽  
Xugen Shi ◽  
Hongyan Wang ◽  
Jie Wang ◽  
Kaiyun Wang ◽  
...  
Keyword(s):  
Resistant Strain ◽  
Cross Resistance ◽  
Cotton Aphid ◽  
Biochemical Characteristics ◽  
Resistance Patterns ◽  
The Cross

Cross-resistance and Fitness Cost Analysis of Resistance to Thiamethoxam in Melon and Cotton Aphid (Hemiptera: Aphididae)

2020 ◽  
Vol 113 (4) ◽  
pp. 1946-1954 ◽  
Author(s):  
Huihui Zhang ◽  
Anqi Chen ◽  
Tisheng Shan ◽  
Wenyang Dong ◽  
Xueyan Shi ◽  
...  
Keyword(s):  
Juvenile Hormone ◽  
Resistant Strain ◽  
Fitness Cost ◽  
Relative Fitness ◽  
Cross Resistance ◽  
Resistance Pattern ◽  
Continuous Exposure ◽  
Cotton Aphid ◽  
Developmental Duration ◽  
The Cross

Abstract The melon/cotton aphid, Aphis gossypii Glover, is a notorious pest in many crops. The neonicotinoid insecticide thiamethoxam is widely used for A. gossypii control. To evaluate thiamethoxam resistance risk, a melon/cotton aphid strain with an extremely high level of resistance to thiamethoxam (>2,325.6-fold) was established after selection with thiamethoxam for 24 generations. Additionally, the cross-resistance pattern to other neonicotinoids and fitness were analyzed. The cross-resistance results showed the thiamethoxam-resistant strain had extremely high levels of cross-resistance against clothianidin (>311.7-fold) and nitenpyram (299.9-fold), high levels of cross-resistance against dinotefuran (142.3-fold) and acetamiprid (76.6-fold), and low cross-resistance against imidacloprid (9.3-fold). Compared with the life table of susceptible strain, the thiamethoxam-resistant strain had a relative fitness of 0.950, with significant decreases in oviposition days and fecundity and prolonged developmental duration. The molecular mechanism for fitness costs was studied by comparing the mRNA expression levels of juvenile hormone acid O-methyltransferase (JHAMT), juvenile hormone-binding protein (JHBP), juvenile hormone epoxide hydrolase (JHEH), ecdysone receptor (EcR), ultraspiracle protein (USP), and Vitellogenin (Vg) in the susceptible and thiamethoxam-resistant strains. Significant overexpression of JHEH and JHBP and downregulation of EcR and Vg expression were found in the thiamethoxam-resistant strain. These results indicate that A. gossypii has the potential to develop extremely high resistance to thiamethoxam after continuous exposure, with a considerable fitness cost and cross-resistance to other neonicotinoids.

scholarly journals Cross-Resistance of Pink Bollworm (Pectinophora gossypiella) to Bacillus thuringiensis Toxins

2000 ◽  
Vol 66 (10) ◽  
pp. 4582-4584 ◽  
Author(s):  
Bruce E. Tabashnik ◽  
Yong-Biao Liu ◽  
Ruud A. de Maagd ◽  
Timothy J. Dennehy
Keyword(s):  
Bacillus Thuringiensis ◽  
Pink Bollworm ◽  
Pectinophora Gossypiella ◽  
Cross Resistance ◽  
Mechanism Of Resistance ◽  
Narrow Spectrum ◽  
Target Sites ◽  
The Cross

ABSTRACT Two strains of pink bollworm (Pectinophora gossypiella) selected in the laboratory for resistance to Bacillus thuringiensis toxin Cry1Ac had substantial cross-resistance to Cry1Aa and Cry1Ab but not to Cry1Bb, Cry1Ca, Cry1Da, Cry1Ea, Cry1Ja, Cry2Aa, Cry9Ca, H04, or H205. The narrow spectrum of resistance and the cross-resistance to activated toxin Cry1Ab suggest that reduced binding of toxin to midgut target sites could be an important mechanism of resistance.

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