Kirkland, R.L. and Peries, I.D. and Hamilton, G.C. (1981) Differentiation and developmental rate of nymphal instars of greenbug reared on sorghum. Journal of the Kansas Entomological Society, 54 (4). pp. 743-747.
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Abstract
Schizaphis graminum (Rond.), a cosmopolitan pest of small-grain cereals, turf grasses and sorghum, appears to be developing resistance to several chemical insecticides in the USA. As a result, interest in biological control is renewed, but for evaluation of the impact of natural enemies on S. graminum its population dynamics must be understood and life-tables constructed, for which the differentiation of each nymphal instar and the development duration under different temperatures is required. Morphological studies were therefore carried out on nymphs reared on sorghum in the laboratory in Colombia, Missouri, and 4 nymphal instars were differentiated based on the number of antennal segments, the length of the terminal segment and the shape of the cauda. The development threshold for nymphal growth was found to be 5 deg C, with an optimum development rate at 30 deg C
| Item Type: | Article |
|---|---|
| Author Affiliation: | Department of Entomology, Missouri University, Columbia, MO 65211, USA |
| Subjects: | Plant Protection |
| Divisions: | Sorghum |
| Depositing User: | Ms K Syamalamba |
| Date Deposited: | 12 Feb 2013 10:26 |
| Last Modified: | 12 Feb 2013 10:26 |
| URI: | http://eprints.icrisat.ac.in/id/eprint/9622 |
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