2000/08/01 by Kei Kawazu, Junichi Hasegawa, Jun‐ichi Hasegawa +10 · 1 citation
Agricultural and Biological Sciences · #Insect Pheromone Research and Control #Insect and Pesticide Research #Plant and animal studies
paper · doi:10.1046/j.1570-7458.2000.00685.x
openalex publication_date 2000/08/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/29
Abstract Sex pheromone components of the Japanese rice leaffolder moth, Cnaphalocrocis medinalis Guenée (Lepidoptera: Pyralidae) were identified from ovipositor extracts of virgin females as ( Z )‐11‐octadecenal, ( Z )‐13‐octadecenal, ( Z )‐11‐octadecen‐1‐ol and ( Z )‐13‐octadecen‐1‐ol at a ratio of 11:100:24:36 by GC‐EAD, GC, GC‐MS. The total amount was estimated to be ca.0.9 ng/female. Field bioassays in Kagoshima, Japan, showed that the two aldehydes are essential for male attraction and the alcohols may have a synergistic effect on the aldehydes. A rubber septum containing 0.9 mg of the four components at the natural ratio was shown to be an effective lure for monitoring this pest in Japan. The above four components are quite different from the sex pheromone components reported previously for the same species of either Philippine or Indian origin; components were shown to be ( Z )‐11‐hexadecenyl acetate and ( Z )‐13‐octadecenyl acetate at a ratio of 98:2 in the Philippine blend and 1:10 in the Indian blend. Furthermore, in the field tests in Japan, neither the Philippine blend nor the Indian blend showed any attractive activity, while the Japanese blend attracted significant numbers of male moths. These results suggest that there are remarkable geographical variations in the sex pheromone composition of this species or there are several distinct species using different sex pheromone blends.