Sukhani, T.R. and Jotwani, M.G. (1980) Ovipositional preference and damage of sorghum shootfly on different stages of tillers of ratoon crop. Indian Journal of Entomology, 42 (3). pp. 488-493.
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Abstract
Observations carried out over 2 years in New Delhi, India, indicated that activity of Atherigona soccata Rond. continued on the ratoon crop of sorghum in the field even after harvest of the main kharif crop (hybrid CSH 5). The site of oviposition depended mainly on the growth stage of tillers. In 2- and 3-leaf-stage tillers, the first leaf was preferred; in 4-leaf-stage tillers, the second leaf; in 5-leaf-stage tillers, the third leaf; in 6-leaf-stage tillers, the fourth leaf; and in 7-leaf-stage tillers, the third and fourth leaves were preferred for oviposition. Differential oviposition was observed on the various growth stages of the tillers. The results showed that the insects least preferred the 2- and 7-leaf stages for oviposition as compared to the other stages; the order of preference was 4 leaves > 3 leaves > 6 leaves > 5 leaves > 2 leaves > 7 leaves. It is concluded that the fly avoids laying eggs on the upper and lower leaves where they can be exposed to natural mortality factors. In addition, the eggs were laid on the lower leaf surface near the basal part, a further protective adaptation for avoiding exposure of eggs. The average percentage of dead heart caused by the fly was greatest at the 5-leaf stage and smallest at the 2-leaf stage of tillers
| Item Type: | Article |
|---|---|
| Author Affiliation: | Division of Entomology, Indian Agricultural Research Institute, New Delhi-110012, India |
| Subjects: | Crop Improvement |
| Divisions: | Sorghum |
| Depositing User: | Ms K Syamalamba |
| Date Deposited: | 20 Mar 2012 05:28 |
| Last Modified: | 20 Mar 2012 05:28 |
| URI: | http://eprints.icrisat.ac.in/id/eprint/3996 |
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