Damage to grain sorghum by fall armyworm and corn earworm

Starks, K.J. and Burton, R.L. (1979) Damage to grain sorghum by fall armyworm and corn earworm. Journal of Economic Entomology, 72 (4). pp. 576-578.

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In field tests, no significant loss in yield occurred when whorls of grain sorghum, Sorghum bicolor (L.) Moench, were infested with 2, 4, 8, or 16 first instars of the fall armyworm, Spodoptera frugiperda (J. E. Smith), at 10 or 20 days after planting. However, infestations applied at 30-49 days after planting caused a high yield loss that increased progressively as the number of larvae increased. When similar infestation levels of corn earworms, Heliothis zea (Boddie), were applied, loss was greatest when sorghum heads were infested at 50% bloom. Injury was less when heads were infested 2 wk after bloom. Increasing the number of corn earworm larvae above 2/head did not increase loss of yield significantly

Item Type: Article
Author Affiliation: Agricultural Research, SEA, USDA, Stillwater, OK 74074
Subjects: Crop Improvement
Divisions: Sorghum
Depositing User: Ms K Syamalamba
Date Deposited: 30 Mar 2012 08:24
Last Modified: 30 Mar 2012 08:25
URI: http://eprints.icrisat.ac.in/id/eprint/4399

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