Woodhead , S. (1983) Surface chemistry of Sorghum bicolor and its importance in feeding by Locusta migratoria. Physiological Entomology, 8 (3). pp. 345-352.
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Abstract
Seedling sorghum cv. 65D was rejected at palpation by nymphs of Locusta migratoria (L.) unless the surface wax was removed. The wax by itself was unpalatable, and when fractionated chromatographically into constituent chemicals its deterrent effects were attributable to the 4-hydroxybenzaldehyde, n-alkane, and ester fractions. Analysis of these last 2 fractions showed that they were unusual in that the carbon chain lengths of the molecules were shorter than expected from previous literature, and it was these smaller molecules (tested as pure chemicals) that were repellent to L. migratoria. The short-chain esters are more volatile than the ineffective longer-chain ones, and it is proposed that the insect may detect these chemicals by short-range olfaction and hence reject the plant before biting, thus imparting a more effective defence to the plant
| Item Type: | Article |
|---|---|
| Author Affiliation: | Tropical Development and Research Institute, London W8 5SJ, United Kingdom |
| Subjects: | Crop Improvement Plant Physiology and Biochemistry > Plant Physiology Plant Physiology and Biochemistry > Biochemistry |
| Divisions: | Sorghum |
| Depositing User: | Mr B Krishnamurthy |
| Date Deposited: | 25 Apr 2012 13:30 |
| Last Modified: | 25 Apr 2012 13:30 |
| Official URL: | http://dx.doi.org/10.1111/j.1365-3032.1983.tb00367... |
| URI: | http://eprints.icrisat.ac.in/id/eprint/4727 |
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