Author:
Keeley P. E.,Thullen R. J.,Miller J. H.
Abstract
Studies were conducted on and in the vicinity of the U. S. Cotton Research Station at Shafter, California, to evaluate the prevalence of the insect Bactra verutana Zeller (Olethreutidae) and its potential for injury to yellow nutsedge (Cyperus esculentus L.). Field surveys during August 1966, and August and October 1967 revealed many infested yellow nutsedge plants. Other field studies indicated that the insect may significantly suppress the growth of yellow nutsedge, providing that the insect infestation is early, sufficiently severe, and present on both parent and subsequently emerging vegetative plants. Greenhouse studies further revealed that severely infested plants may survive to produce numerous vegetative plants and tubers. While Bactra verutana Zeller damaged yellow nutsedge plants late in the season, the absence of early infestation limited its usefulness as a biological control agent.
Publisher
Cambridge University Press (CUP)
Subject
Plant Science,Agronomy and Crop Science
Reference4 articles.
1. Personal communication (Dr. Lloyd A. Andres, Leader, Biological Control of Weeds Investigations, Entomol. Res., Div. Agr. Res. Serv., U. S. Dep. of Agr., Albany, California).
2. Control of the Stem Borer Bactra verutana on Cyperus papyrus
3. Studies on Nutgrass Insects in Southern California and Their Effectiveness as Biological Control Agents1
4. Observations on the biology of Bactra (Nannobactra) minima minima, Meyrick and the damage caused by it to nutgrass, Cyperus rotundus L;Sankaran;Tech. Bull. Commonw. Inst. Biol. Control, Bangalore, India.,1966
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