Plant Volatiles and Oviposition Behavior in the Selection of Barley Cultivars by Wheat Stem Sawfly (Hymenoptera: Cephidae)

Abstract Wheat stem sawfly, [Cephus cinctus (Hymenoptera: Cephidae)], females display complex behaviors for host selection and oviposition. Susceptible hollow wheat (Triticum aestivum L.) cultivars release a greater amount of attractive compound, (Z)-3-hexenyl acetate receive number eggs compared to resistant solid cultivars. However, barley (Hordeum vulgare is becoming more common C. in Montana. Therefore, how do oviposition on compare what happens when encountering cultivars? To answer this question, we carried out greenhouse experiments using two cultivars: ‘Hockett’ ‘Craft’. Between these at Zadoks stages 34 49, decisions Y-tube olfactometer, stems, counted the inside individual stems. In bioassays, found were attracted airstream passing over than ‘Craft’ Although frequencies similar between cultivars, was ‘Hockett’. Volatile profiles indicated that linalool from while both 49. These results suggest volatiles plants influenced behavior ovipositing females, other discriminating not differ