TY - JOUR
T1 - Insecticide resistance increases the vector competence
T2 - a case study in Frankliniella occidentalis
AU - Wan, Yanran
AU - Zheng, Xiaobin
AU - Xu, Baoyun
AU - Xie, Wen
AU - Wang, Shaoli
AU - Zhang, Youjun
AU - Zhou, Xuguo
AU - Wu, Qingjun
N1 - This study was funded by the national key R&D Program of China (2017YFD201000), the Natural Science Foundation of China (31572037 and 31772199), the Science and Technology Innovation Program of the Chinese Academy of Agricultural Sciences (CAAS-ASTIP-IVFCAAS), Beijing Leafy Vegetables Innovation Team of Modern Agro-industry Technology Research System (BAIC07-2018), and Beijing Key laboratory for Pest Control and Sustainable Cultivation of Vegetables.
PY - 2021/1
Y1 - 2021/1
N2 - The western flower thrips, Frankliniella occidentalis, is the most efficient vector for Tomato spotted wilt orthotospovirus (TSWV), a devastating plant pathogen. Insecticide resistance is a common issue in pest management. The interactions between insecticide resistance in insect vector and the transmission of plant pathogen, however, are largely unknown. In this study, we assessed the effects of spinosad resistance on TSWV transmission using a pair of near-isogenic lines of susceptible (Ivf03) and resistant (NIL-R) F. occidentalis. NIL-R had a prolonged pre-adult stage, but a shorter adult life span than Ivf03. More importantly, the pupation rate and sex ratio (female/male) in NIL-R were significantly reduced in comparison with Ivf03. When given a shorter acquisition access period (AAP) of 6 h, virus propagation and transmission efficiency in NIL-R were significantly higher than Ivf03. In contrast, a longer AAP of 96 h led to a similar virus acquisition and transmission efficiency for both strains, although TSWV replication was greater in NIL-R. Our combined results suggest that (1) substantial fitness costs (e.g., reduced pupation rate) are associated with spinosad resistance in F. occidentalis; however, (2) insecticide resistance increases vector competence.
AB - The western flower thrips, Frankliniella occidentalis, is the most efficient vector for Tomato spotted wilt orthotospovirus (TSWV), a devastating plant pathogen. Insecticide resistance is a common issue in pest management. The interactions between insecticide resistance in insect vector and the transmission of plant pathogen, however, are largely unknown. In this study, we assessed the effects of spinosad resistance on TSWV transmission using a pair of near-isogenic lines of susceptible (Ivf03) and resistant (NIL-R) F. occidentalis. NIL-R had a prolonged pre-adult stage, but a shorter adult life span than Ivf03. More importantly, the pupation rate and sex ratio (female/male) in NIL-R were significantly reduced in comparison with Ivf03. When given a shorter acquisition access period (AAP) of 6 h, virus propagation and transmission efficiency in NIL-R were significantly higher than Ivf03. In contrast, a longer AAP of 96 h led to a similar virus acquisition and transmission efficiency for both strains, although TSWV replication was greater in NIL-R. Our combined results suggest that (1) substantial fitness costs (e.g., reduced pupation rate) are associated with spinosad resistance in F. occidentalis; however, (2) insecticide resistance increases vector competence.
KW - Fitness cost
KW - Frankliniella occidentalis
KW - Spinosad resistance
KW - TSWV
KW - Vector competence
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U2 - 10.1007/s10340-020-01207-9
DO - 10.1007/s10340-020-01207-9
M3 - Article
AN - SCOPUS:85079750878
SN - 1612-4758
VL - 94
SP - 83
EP - 91
JO - Journal of Pest Science
JF - Journal of Pest Science
IS - 1
ER -