Open AccessFitness costs in clothianidin-resistant population of the melon aphid, Aphis gossypii
Author(s) -
Farman Ullah,
Hina Gül,
Kaleem Tariq,
Nicolas Desneux,
Xiwu Gao,
Dunlun Song
Publication year - 2020
Publication title -
plos one
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.99
H-Index - 332
ISSN - 1932-6203
DOI - 10.1371/journal.pone.0238707
Subject(s) - aphis gossypii , clothianidin , biology , population dynamics , aphididae , aphid , fecundity , neonicotinoid , population , pest analysis , strain (injury) , toxicology , horticulture , botany , imidacloprid , agronomy , homoptera , pesticide , medicine , thiamethoxam , anatomy , environmental health
Clothianidin is a second-generation neonicotinoid insecticide, widely used against sap-sucking insect pest including melon aphid, Aphis gossypii Glover (Hemiptera: Aphididae). This pest causes severe economic damage to Cucurbitaceae plants worldwide. In this study, we investigated clothianidin resistance development under continuous selection pressure. Moreover, the age-stage, two-sex life table approach was used to evaluate the impact of clothianidin resistance on the fitness of A . gossypii . A clothianidin resistant strain (CT-R) with a 23.17-fold resistance level was developed from a susceptible strain (CT-S) after continuous selection for 24 generations. Life table results showed a significant reduction in the relative fitness (0.847) of CT-R strain compared to the CT-S strain of A . gossypii . The developmental duration, oviposition days, total pre-oviposition period (TPOP), longevity, and fecundity of CT-R strain were found to be significantly lower when compared to CT-S strain. The demographic parameters, including the intrinsic rate of increase ( r ), finite rate of increase ( λ ), net reproductive rate ( R 0 ), and mean generation time ( T ) were also significantly decreased in CT-R strain compared to the CT-S strain. Both the reproductive and survival rates were affected by clothianidin resistance in CT-R strain compared with the CT-S strain of A . gossypii . Overall, our results demonstrate that in-depth knowledge about the trade-off at play between resistance degree and fitness cost might be useful to design resistance management strategies against A . gossypii .