Lethal and sublethal effects of chlorantraniliprole on the migratory moths Agrotis ipsilon and A. segetum: New perspectives for pest management strategies

Abstract

BACKGROUND: Agrotis ipsilon and A. segetum are major migratory pests of many crops in China, and frequent regional outbreaks cause severe yield losses. Use of food attractants is one of the most promising control methods against adult lepidoptera, notably through the attract-and-kill strategy. Chlorantraniliprole's acute toxicity and sublethal effects on both moths were evaluated.RESULTS: Chlorantraniliprole showed high activity against both adults of both species, with LC 20 and LC 50 values of 0.08 and 0.21 mg L −1 (A. ipsilon), and 0.14 and 0.51 mg L −1 (A. segetum). The fecundity, effective oviposition rate, and egg hatching rate of both species in dual-sex exposure treatments were all significantly reduced compared with the control, and the population growth coefficients in the LC 50 ♀ × LC 50 ♂ treatments were only 0.32% (A. ipsilon) and 3.35% (A. segetum) that of the control. Furthermore, the flight distance was significantly suppressed from 6.67 km (control) to 0.01 km (LC 50 ) for A. ipsilon, and from 7.39 km (control) to 0.78 km (LC 50 ) for A. segetum. The proportions of robust-and medium-flight individuals of A. ipsilon and A. segetum in exposure treatments were greatly reduced. CONCLUSIONS: Low lethal concentration exposures to chlorantraniliprole can drastically reduce the reproduction and flight performance of A. ipsilon and A. segetum, while inhibiting the production of offspring, suggesting chlorantraniliprole would be an excellent compound for use in combination with food attractants. Chlorantraniliprole has good potential for management of the two long-range migratory pests tested using an attract-and-kill strategy.

Lethal and sublethal effects of broflanilide on four tephritid pests (Diptera: Tephritidae)

“…Sublethal doses of pesticides can reduce or elevate fecundity. For example, Agrotis ipsilon and Agrotis segetum exposed to sublethal concentrations of chlorantraniliprole showed significantly reduced fecundity, 40 whereas, in the present study, the fecundity of B. dorsalis (LC 15 and LC 30 treatment), B. correcta (LC 15 and LC 30 treatment), and B. cucurbitae (LC 30 treatment) was elevated after exposure to sublethal concentrations of broflanilide. Similar effects were found in both H. armigera (reduced fecundity) 41 and T. incertulas (increased fecundity) 23 .…”

The Comparative Toxicity, Biochemical and Physiological Impacts of Chlorantraniliprole and Indoxacarb on Mamestra brassicae (Lepidoptera: Noctuidae)

“…Sublethal effects are defined as physiological, biological, and behavioral changes in individual insects or populations [ 26 ]. More recently, the toxicity and sublethal impacts of chlorantraniliprole and indoxacarb were reported in several insect pests [ 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 ]. Sublethal effects might also reflect protective physiological responses such as the complement of cytochrome P450-dependent monooxygenases, carboxylesterases (CarE), and glutathione S -transferases (GST) that impact insecticide metabolism [ 36 ].…”

Unclassified glutathione‐S‐transferase AiGSTu1 confers chlorantraniliprole tolerance in Agrotis ipsilon

“…24 The diamide insecticide chlorantraniliprole (CAP; CAS number: 500008-45-7) shows high efficacy against A. ipsilon. 25 CAP has a novel mode of action that selectively activates insect ryanodine receptors (RyRs), resulting in demolished intracellular calcium ion (Ca 2+ ) homeostasis by inducing unregulated Ca 2+ release through RyRs. 26 The extensive application of CAP has caused insecticide resistance in many insect species including S. exigua, 27 Plutella xylostella 28 and Chilo suppressalis.…”