Mechanisms of partial plant resistance to diamondback moth (Plutella xylostella) in brassicas

Hariprasad, K. V. and van Emden, H. F. (2010) Mechanisms of partial plant resistance to diamondback moth (Plutella xylostella) in brassicas. International Journal of Pest Management, 56 (1). pp. 15-22. ISSN 0967-0874 doi: 10.1080/09670870902980834

Abstract/Summary

Artificial diet studies were used to differentiate among physical and chemical mechanisms affecting the suitability to diamondback moth (Plutella xylostella L.), of 16 food substrates obtained by growing four different brassicas in the glasshouse or field and measuring the pest's performance on either leaf discs or a diet incorporating leaf powders. Leaves of Chinese cabbage and the cabbage cultivar 'Minicole' were, respectively, the most and least suitable leaves for the insect, but this ranking was reversed on artificial diet. Leaves of glasshouse-grown plants were more suitable than those of plants grown in the fields. Differences in the suitability of leaves to diamondback moth appeared to be largely determined by leaf toughness and surface wax load. Concentrations of individual glucosinolates in the brassicas probably acted as phagostimulants, so increasing their intrinsic susceptibility to diamondback moth, but the effect of the physical factors appeared more important.

Item Type	Article
URI	https://reading-clone.eprints-hosting.org/id/eprint/17508
Item Type	Article
Refereed	Yes
Divisions	Life Sciences > School of Biological Sciences > Ecology and Evolutionary Biology
Uncontrolled Keywords	diamondback moth; Plutella xylostella; brassica; host plant resistance; leaf toughness; surface waxes; glucosinolates
Publisher	Taylor & Francis
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