Insecticide susceptibility of brown planthopper (Nilaparvata lugens) and white-backed planthopper (Sogatella furcifera) in Vietnam and Japan to triflumezopyrim and other insecticides.

Authors

Mizuki Matsukawa-Nakata, Masaya Matsumura, Chung Huy Nguyen, Tho Thi Nguyen, Nhung Thi Lam, Hung Nguyen, Youichi Kobori, Sachiyo Sanada-Morimura

Published in

Pest management science. Oct 14, 2026. Epub Oct 14, 2026.

Abstract

Nilaparvata lugens (Stål) and Sogatella furcifera (Horváth), which are rice planthoppers that migrate from Vietnam to Japan via China, have developed resistance to certain insecticides. Long-term monitoring of insecticide susceptibility in these insect pests is required to develop effective strategies for controlling their populations. However, long-term monitoring of the insecticide susceptibility of N. lugens and S. furcifera has not yet been conducted in Vietnam. Here, we determined fluctuations in the median lethal dose (LD₅₀) values of triflumezopyrim, which is a newly developed insecticide, and other insecticides against N. lugens and S. furcifera to reveal the current trends (2018-2024) in the insecticide susceptibility of N. lugens and S. furcifera in Vietnam and Japan.
The LD₅₀ values of triflumezopyrim against N. lugens and S. furcifera in Vietnam and Japan remained low during the study period. The LD₅₀ values of neonicotinoids against N. lugens in both countries exhibited an increasing trend, whereas the LD₅₀ values of neonicotinoids against S. furcifera remained low.
We clarified species-specific differences in insecticide susceptibility between N. lugens and S. furcifera. Similar fluctuations in the LD₅₀ values of the tested insecticides against N. lugens and S. furcifera in Vietnam and Japan supported the hypothesis that Vietnam is the population source of rice planthoppers that migrate to Japan. Overall, our results indicate that at present, triflumezopyrim is effective in controlling rice planthoppers in Vietnam and Japan. However, continued monitoring of insecticide susceptibility is required for insecticide resistance management in East Asia. © 2026 Society of Chemical Industry.

PMID:
42870571
Bibliographic data and abstract were imported from PubMed on 14 Oct 2026.

Read full publication at:
Please sign in to see all details.

Stats

1-terrible, 9-excellent. How would you rate this publication? Sign in in to submit your rating.

Post a comment

You need to be signed in to post comments. You can sign in here.

Comments

There are no comments yet.