Roome, R.E. (1975) Activity of adult Heliothis armigera (Hb.) (Lepidoptera, Noctuidae) with reference to the flowering of sorghum and maize in Botswana. Bulletin of Entomological Research, 65 (3). pp. 523-530.
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Abstract
Night-time observations on adults of Heliothis armigera (Hb.), and data from light-trap and hand-net catches in irrigated and dryland crops of sorghum in Botswana showed that both sexes flew and fed and the females oviposited between 8 p.m. and 11 p.m. From then until 2 a.m., both sexes were inactive, but from 2 a.m. to 4 a.m., the males flew above the crop in a 'purposeful' manner, while the females were stationary and released a pheromone. During this period of high male and low female activity, copulation in cages, assembly of males to females in cages and copulating pairs on crop plants were all observed. Inseminated females of H. armigera were collected in crops which were at a stage suitable for oviposition, but traps away from crops or near ripe crops collected mainly virgin females. It is suggested that susceptible crops attract adults of H. armigera and that, once within the crop, inseminated females are 'trapped' by suitable physiological cues from the plants. Identification of such cues could assist in the breeding of crop varieties resistant to attack by H. armigera
| Item Type: | Article |
|---|---|
| Author Affiliation: | Centre for Overseas Pest Research, London W8 5SJ, UK |
| Subjects: | Plant Protection |
| Divisions: | Maize Sorghum |
| Depositing User: | Ms K Syamalamba |
| Date Deposited: | 20 Sep 2012 06:14 |
| Last Modified: | 20 Sep 2012 06:15 |
| Official URL: | http://dx.doi.org/10.1017/S0007485300006192 |
| URI: | http://eprints.icrisat.ac.in/id/eprint/8003 |
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