Twine, P.H. and Kay, I.R. and Lloyd , R.J. (1983) Heliothis in sorghum. Queensland Agricultural Journal, 109 (4). pp. 185-188.
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Abstract
The recognition, biology (including parasitism by Trichogramma spp., Trichogrammatoidea sp. and Telenomus sp.) and injuriousness of Heliothis armigera (Hb.) on sorghum are reviewed, and the results are presented of trials in Queensland in which economic thresholds were developed in relation to levels of infestation, the value of expected yields and the costs of insecticides (especially carbaryl, cypermethrin, deltamethrin, endosulfan, fenvalerate and methomyl) and their application. Sampling methods are described, and it is suggested that in situations where both H. armigera and Contarinia sorghicola (Coq.) have to be controlled, a product that is recommended for both pests should be selected. Little is known of the economic implications of infestation of sorghum by Cryptoblabes adoceta Turner and Dichocrocis punctiferalis (Gn.) (the other 2 larvae which infest sorghum heads), but it is believed that infestations well in excess of 10 larvae per head may constitute an economic problem
| Item Type: | Article |
|---|---|
| Author Affiliation: | Entomology Branch, Department of Primary Industries, Queensland, Australia |
| Subjects: | Crop Improvement Plant Physiology and Biochemistry > Plant Physiology |
| Divisions: | Sorghum |
| Depositing User: | Mr B Krishnamurthy |
| Date Deposited: | 01 May 2012 14:42 |
| Last Modified: | 01 May 2012 14:42 |
| URI: | http://eprints.icrisat.ac.in/id/eprint/5017 |
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