Jute Leaf Physicochemical cue-mediated Behavioral Responses of Diacrisia casignetum Kollar
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The role of jute, Chorchorus capsularis (cv. Sonali; JRC-321), leaf physicochemical cues in the form of cuticular surface ultrastructures and wax chemicals mainly n-alkanes and free fatty acids (FFAs) on attraction and oviposition preference of Diacrisia casignetum Kollar (Lepidoptera: Arctiidae) was studied under laboratory conditions. The GC–MS and GC-FID analyses of mature jute leaf surface wax indicated the presence of 257.04 and 171.36 µg/leaf n-alkanes and FFAs, respectively. Eighteen n-alkanes from n-C16 to n-C36 and 13 FFAs from C12:0 to C20:0 were detected in the leaf surface wax. The cuticular surface ultrastructures and its chemicals have been demonstrated in this work to serve as cues for eliciting attraction and oviposition responses of the adults to mature jute leaves. The synthetic combination mixture mimicking the natural surface wax components of 4 n-alkanes (n-C17, n-C18, n-C27, n-C29) and 5 FFAs (C16:0, C16:1, C18:1, C18:2, C18:3) was most attractive to D. casignetum adults, whereas same mixtures excluding 2 n-alkanes (n-C27, n-C29) indicated significantly optimum oviposition preference at leaf equivalent (µg/leaf) concentrations that may be used for this pest management program as baited trap. The present study will also ensure sustainability of success in integrated pest management (IPM) in the form of green pest management (GPM) in the near future.
KeywordsChorchorus capsularis Physicochemical cues n-Alkanes Free fatty acids Diacrisia casignetum
The work was funded by a minor research project provided by the University Grants Commission [F. No. PSW-025/13-14], New Delhi, Government of India. The author is highly grateful to the USIC department for SEM study, Chemical Ecology Laboratory for GC-FID and the Department of Chemistry for FT-IR, The University of Burdwan, West Bengal, India. He is also thankful to the IICB, Kolkata, West Bengal, India, for GC–MS analysis.
NR designed the whole study including sample collection, chemical analysis and data analysis and prepared the manuscript.
Compliance with Ethical Standards
Conflict of interest
The author declares that there is no conflict of interest.
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