Effect of date of sowing on the incidence and damage by sorghum midge

Jotwani, M.G. and Sukhani, T.R. and Kishore, P. and Srivastava, K.P. (1976) Effect of date of sowing on the incidence and damage by sorghum midge. Cecidologia Indica, 11 (1-3). pp. 69-76.

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The results of tests in experimental plots at the Indian Agricultural Research Institute in New Delhi in 1968-72 confirmed general observations that the early sown crop of sorghum escapes serious damage by Contarinia sorghicola (Coq.) whereas the late sown crop usually suffers heavy loss. Sudden fluctuations in the midge populations were found to result either from continuous drought (with consequent low humidity before and during the sorghum flowering period) or from heavy rainfall during the peak of midge incidence; since both of these weather conditions were unfavourable to C. sorghicola, their occurrence sometimes protected late-sown crops from heavy midge damage. The results of the experiments indicated that the most favourable conditions for infestation were a mean temperature of 25-30 deg C and a relative humidity above 60%

Item Type: Article
Author Affiliation: Division of Entomology, Indian Agricultural Research Institute, New Delhi - 110012, India
Subjects: Plant Protection
Environmental Science
Divisions: Sorghum
Depositing User: Ms K Syamalamba
Date Deposited: 02 Aug 2012 07:21
Last Modified: 02 Aug 2012 07:23
URI: http://eprints.icrisat.ac.in/id/eprint/7133

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