Studies on Nutgrass Insects in Southern California and Their Effectiveness as Biological Control Agents1

1 June 1964

journal article
research article
Published by Oxford University Press (OUP) in Journal of Economic Entomology

Vol. 57 (3) , 379-383
https://doi.org/10.1093/jee/57.3.379

Abstract

Two species of nutgrass, Cyperus rotundus L. and C. esculentus L (Cypernaceae), are considered weeds in southern California and were investigated for possibilities of control with biological agents. Surveys conducted in 8 counties in southern California revealed the following insects attacking nutgrass, most of which were previously unknown from these plants: Bartra verutana Zeller var. chrysca lIeinrich (Olethreutidae); Dorcadothrips Caecpilis Priesner (Thripidae); Alellroeybotus sp. (Aleyrodidlle); Phellacoccus solani Ferris (Coccidlle); chorizococcus tostellum (Hoke) (Coccidae); Rhizoecus cacticans Hambleton (Coccidae); Sphenophorus phoeniciensis (Chittenden) (Curculionidae). Observations on their biology, parasites, and distribution are made and their effect as biological control agents is discussed.

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