Sorghum Midge and Midge Parasitism on Johnsongrass

Authors: GILSTRAP, FRANK E.; BROOKS, G. W.

Source: Journal of Economic Entomology, Volume 84, Number 2, April 1991 , pp. 431-435(5)

Publisher: Entomological Society of America

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Abstract:

Johnsongrass, Sorghum halepense L., in the soft dough stage was the optimal spikelet developmental stage for monitoring sorghum midge and its hymenopterous parasites in Johnson grass. The soft dough stage contained the greatest percentage of late instar sorghum midge, Contarinia sorghicola (Coquillett) and hymenopterous larvae and pupae. The parasite, Tetrastichus near blastophagi (Ashmead) emerged significantly earlier than midge parasites Eupelmus popa Girault, ApTostocetus diplosidis Crawford, or T. near venustus Gahan. Mean emergence times for E. popa, A. diplosidis, and T. near venustus were not Significantly different from each other. T. near blastophagi was obtained only from pedicellate spikelets, whereas midges and the other three collected parasites were obtained from both pedicellate and sessilespikelets.

Document Type: Research Article

Publication date: April 1, 1991

More about this publication?
  • Journal of Economic Entomology is published bimonthly in February, April, June, August, October, and December. The journal publishes articles on the economic significance of insects and is divided into the following sections: apiculture & social insects; arthropods in relation to plant disease; forum; insecticide resistance and resistance management; ecotoxicology; biological and microbial control; ecology and behavior; sampling and biostatistics; household and structural insects; medical entomology; molecular entomology; veterinary entomology; forest entomology; horticultural entomology; field and forage crops, and small grains; stored-product; commodity treatment and quarantine entomology; and plant resistance. In addition to research papers, Journal of Economic Entomology publishes Letters to the Editor, interpretive articles in a Forum section, Short Communications, Rapid Communications, and Book Reviews.
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