Damage assessment of a false chinch bug, Nysius raphanus (Howard), in grain sorghum

Teetes, G.L. and Johnson, J.W. and Rosenow, D.T. (1974) Damage assessment of a false chinch bug, Nysius raphanus (Howard), in grain sorghum. Other. Texas Agricultural Experiment Station, Texas.

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Abstract

Damage to gain sorghum by a false chinch bug, Nysiusaphanus (Howard), was assessed by confining different populations in cages on sorghum heads. Reductions in grain ~ i e l dw ere evident only when 200 bugs per head damaged 23 percent of the seed Increase in weight of undamaged seed apparently compensated For yield loss to a point because in most of the treatments percentage of damaged seed was less than the percentage increase in seed weight. Only when percentage of damaged seed was greater than the percentage increase in seed weight was there evidence of reduced yields. The point of equal compensatov effect occurred at 14 percent damaged seed or approximately 140 bugs per head

Item Type:	Monograph (Other)
Author Affiliation:	Agricultural Experiment Station
Subjects:	Crop Improvement
Divisions:	Sorghum
Depositing User:	Ms K Syamalamba
Date Deposited:	21 Sep 2012 06:16
Last Modified:	21 Sep 2012 06:17
URI:	http://eprints.icrisat.ac.in/id/eprint/8024

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