Synergistic activity of plant essential oils with d-cyphenothrin against Blattella germanica
10.3969/j.issn.1005-0507.2026.03.010
- VernacularTitle:8种精油对右旋苯醚氰菊酯防治德国小蠊的增效研究
- Author:
Yun-yan LAI
1
;
Cai-ling GUAN
1
;
Ying-hua WU
1
;
Jian ZHU
1
Author Information
1. Zhongshan Lanju Daily Chemical Industrial Co., Ltd., Zhongshan 528434, Guangdong, China
- Publication Type:Journal Article
- Keywords:
Blattella germanica;
Essential oils;
D-cyphenothrin;
Contact toxicity;
Synergistic activity
- From:
Acta Parasitologica et Medica Entomologica Sinica
2026;33(3):216-222
- CountryChina
- Language:Chinese
-
Abstract:
Objective In this study, the resistance of Blattella germanica to D-cyphenothrin in Guangdong Province was analyzed. Further, the contact activity of eight types of plant essential oils against B. germanica and their synergistic effects with D-cyphenothrin were tested and screened, providing a basis for slowing down insecticide resistance in pests and developing plant synergists. Methods The drip test method was used to measure the resistance levels of B. germanica to D-cyphenothrin in four cities of Guangdong Province:Zhongshan City, Foshan City, Zhuhai City, and Jiangmen City. In addition, the contact killing activities of eight types of plant essential oils against B. germanica, namely, garlic, cinnamon, clove, camphor, eucalyptus leaves, tea tree, Angelica dahurica and peppermint, and their synergistic activities with D-cyphenothrin were evaluated. Results Except for B. germanica in the Xiaolan area of Zhongshan, which was moderately resistant, B. germanica in the other four towns in Guangdong were all highly resistant. Among the eight essential oils tested, garlic essential oil had the strongest toxic activity against B. germanica, with LD50 values of 45.01 μg/individual. A concentration of 2% essential oil plus D-cyphenothrin (LD20)was used to screen for synergistic activity. After 24 h of treatment, Angelica dahurica, garlic, peppermint, camphor, and tea tree essential oils showed synergistic activity. Of these, A. dahurica essential oil had the strongest synergistic activity, with a synergistic coefficient of 125%. Conclusions The essential oil of garlic had the strongest toxic activity against B. germanica, and the essential oils of A. dahurica and garlic together had the strongest synergistic activity with D-cyphenothrin, thereby providing a reference for developing natural plant synergists.
- Full text:2026102023561322521SYNERGISTIC ACTIVITY OF PLANT ESSENTIAL OILS WITH D-CYPHENOTHRIN AGAINST BLATTELLA GERMANICA_.pdf
