Chafer beetles as a pest of sorghum and pearl millet

Gahukar, R.T. and Pierrard, G. (1983) Chafer beetles as a pest of sorghum and pearl millet. FAO Plant Protection Bulletin, 31 (4). pp. 168-169.

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In 1980 and 1981, scarabaeid adults were found infesting sorghum and pearl millet in the Diourbel region of central Senegal. Feeding occurred on flowers, often resulting in empty glumes. The beetle, formerly thought to be Rhinyptia reflexa, was identified as R. infuscata. Observations made on the biology of the pest are described. Large numbers were captured at light from 26 September to 7 October 1980, and, during the night, the highest activity occurred from 1900 to 2300 h. It was thought that heavy and continuous rainfall during August might have provided favourable conditions for adult emergence. Highest population densities coincided with the flowering of local millets and short-cycle sorghums. Field tests showed that the yield losses caused by populations of 5-30 adults/head in 1980 were 11.3-15.9% and by those of 5-60 adults/head in 1981 21.0-38.2%

Item Type: Article
Subjects: Plant Protection > Pests
Divisions: Sorghum
Depositing User: Ms K Syamalamba
Date Deposited: 24 Feb 2012 05:40
Last Modified: 24 Feb 2012 05:40

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