Electrophysiological and Behavioral Responses of Spotted Stem Borer, Chilo partellus, to Sex Pheromone Components and Their Blends

The spotted stem borer, Chilo partellus (Lepidoptera: Crambidae) is the major insect pest of maize and sorghum crops during the rainy season. The pheromone released by adult virgin females has been reported to consist of (Z)-11-hexadecenal ( Z 11–16:Ald) as major component and (Z)-11-hexadecenol (Z1...

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Bibliographic Details
Published in:Journal of chemical ecology 2023-04, Vol.49 (3-4), p.155-163
Main Authors: Guleria, Niraj, Nebapure, Suresh M., Kamala Jayanthi, P. D., S.B., Suby, MG, Deeksha
Format: Article
Language:English
Subjects:
Agriculture
Aldehydes - pharmacology
Animals
Antennae
Attraction
Bioassays
Biochemistry
Biological Microscopy
Biomedical and Life Sciences
Borers
Butterflies & moths
Cereal crops
Chilo partellus
Ecology
Entomology
Female
Insects
Isomers
Life Sciences
Male
Males
Mixtures
Moths - physiology
Pest control
Pests
Pheromones
Pheromones - pharmacology
Plant protection
Rainy season
Sex Attractants - pharmacology
Sex Attractants - physiology
Sex pheromone
Sorghum
Wind tunnels
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Summary:The spotted stem borer, Chilo partellus (Lepidoptera: Crambidae) is the major insect pest of maize and sorghum crops during the rainy season. The pheromone released by adult virgin females has been reported to consist of (Z)-11-hexadecenal ( Z 11–16:Ald) as major component and (Z)-11-hexadecenol (Z11–16OH) as minor component. The latter has been reported to reduce the efficiency of major component to trap the male moths. We studied the electrophysiological and behavioral response of male C. partellus moths to Z 11–16:Ald, Z11–16OH, their E -isomers ( E )-11-hexadecenal and ( E )-11-hexadecen-1-ol, and blends. Electroantennogram (EAG) studies revealed that male C. partellus antennae elicited significantly greater responses to both ( Z )-11-hexadecenal and ( Z )-11-hexadecenol compared to their respective E -isomers. Behavioral response studies through wind tunnel and cage bioassay showed that blends of Z 11–16:Ald and Z 11–16OH in the proportion of 100:100 and 100:95 elicited significantly higher responses from male moths. The attractiveness of these pheromone components and blends in field also revealed that traps baited with 100:100 proportion was most effective. Our studies clearly showed that the minor alcohol component Z 11–16OH is important for enhancing attractiveness of the pheromone and provides a more effective blend for monitoring of this pest.
ISSN:0098-0331
1573-1561
DOI:10.1007/s10886-023-01419-0