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

Journal of plant interactions

article

Henlay J.O. Magara¹  Daniel M. Mutyambai¹  Midega A.O. Charles¹  Syprine A. Otieno²  Teresia M. Nyaga⁵  Saliou Niassy¹  Zeyaur R. Khan¹ 

[1] a International Centre of Insect Physiology and Ecology (icipe);b School of Pure and Applied Sciences, Kenyatta University;c School of Agricultural and food Sciences, Jaramogi Oginga Odinga University Science and Technology (JOOUST);d Department of Biology, South Eastern Kenya University;e Department of Biochemistry, Jomo Kenyatta University of Agriculture and Technology

关键词: Brachiaria brizantha;    Chilo partellus;    herbivore induced plant volatiles;    inducing defense;    insect oviposition;    Zea mays;   

DOI  :  10.1080/17429145.2020.1827056

学科分类：纳米科学和纳米技术

来源: Taylor & Francis

【 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】

CC BY|CC BY-NC