Mating disruption of Chilo suppressalis (Lepidoptera: Crambidae) with novel aerosol dispensers in rice field
Year: 2025
Type: article
Abstract: BACKGROUND: Chilo suppressalis is an important rice pest. Its control has relied heavily on synthetic insecticides. To reduce the application of insecticides, integrated pest management strategies such as incorporating mating disruption (MD) with insect pheromones are critically needed. RESULTS: A novel aerosol dispenser was evaluated for MD efficacy against C. suppressalis. Laboratory tests revealed that pheromone adsorption on rice plants increased with exposure time (2-10 h) at 0.05 m from the dispenser, but no significant differences were observed at 2 m. Field trials demonstrated a 31% reduction in female pheromone titers of Z11-16:Ald under MD. While mating rates remained unaffected at low adult densities (1 or 5 pairs of adults in a cage), they decreased by 31% at high density (20 pairs in a cage), with the total numbers of eggs laid decreased by 45.5%. MD suppressed the adult populations by 89-100% in the overwintering generation and by 67-100% in the first generation. MD reduced the larval densities by 80-90%, and the number of damaged rice plant by 64-89%, compared to controls. CONCLUSION: The novel dispenser effectively diffused and retained sex pheromones in rice fields, reducing C. suppressalis female sex pheromone secretion, and mating success. Consequently, the amount of eggs laid by C. suppressalis females in the field was strikingly reduced, leading to decreased number of larvae and reduced damage in rice plants. The findings highlight MD as a sustainable alternative to insecticides for managing C. suppressalis population. © 2025 Society of Chemical Industry.
Source: Pest Management Science
DOI: 10.1002/ps.8855
Authors: Dan Zhang, Lili Qu, Lu Song, Junzuo Li, Wanmin Zhang, Wei Meng, Qianshuang Guo, Yongjun Du
Institution: Zhejiang University
Language: English
Subfield: Insect Science
Domain: Life Sciences
SDGs: Zero hunger, Life on land
Open Access status: bronze
OpenAlex ID: W4409973217