Responses of stemborer Chilo partellus to volatiles emitted by maize landraces exposed to signal grass (Brachiaria brizantha)

Journal of Plant Interactions

卷:15

Teresia M. Nyaga¹  Henlay J.O. Magara²  Zeyaur R. Khan²  Saliou Niassy²  Daniel M. Mutyambai²  Midega A.O. Charles²  Syprine A. Otieno³ 

[1] Department of Biochemistry, Jomo Kenyatta University of Agriculture and Technology;

[2] International Centre of Insect Physiology and Ecology (icipe);

[3] School of Pure and Applied Sciences, Kenyatta University;

关键词: brachiaria brizantha;    chilo partellus;    herbivore induced plant volatiles;    inducing defense;    insect oviposition;    zea mays;   

DOI  :  10.1080/17429145.2020.1827056

来源: DOAJ

【 摘 要 】

This study sought to evaluate the oviposition responses of Chilo partellus (Lepidoptera: Crambidae) on maize plants exposed to Brachiaria brizantha Stapf following oviposition by C. partellus and nonexposed maize. Two Kenyan maize landraces (Jowi and Nyamula), Latin America landrace (Cuba 91) and WH505 (hybrid variety) (control) were studied. The result demonstrated that C. partellus deposited a significantly lower number of eggs and egg batches on Nyamula, Jowi and Cuba 91 maize plants exposed to B. brizantha with C. partellus eggs compared to nonexposed ones and the exposed hybrid variety. This was because they emitted electrophysiologically active compounds such as (E)-4, 8-dimethyl-1, 3, 7-nonatriene, decanal, (E)-caryophyllene, linalool, linalool (plus nananal), E-β-fernesene, methyl salicylate and (3E, 7E)-4, 8, 12-trimethyl-1, 3, 7, 11-tri-decatetraene that deterred C. partellus from ovipositing more eggs on these plants. Therefore, herbivore-induced plant volatiles (HIPVs) of B. brizantha can be employed to protect the maize crop against C. partellus.

【 授权许可】

Unknown