Background and update on results of previous studies.
Lygus bugs play a pivotal role in cotton pest management. They cause direct damage to bolls, and their control with broad spectrum pesticides disrupts natural enemies and induces outbreaks of secondary pests. Cotton pests and their natural enemies move within cotton fields and migrate between the field and adjacent areas. Quantitative knowledge of the movement of Lygus bugs is lacking in the field. Understanding of the dispersal and host finding behavior of these pests and their natural enemies is needed for IPM. This will also…
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The cotton stalk management study o f one-pass stalk embedding as a key component to a reduced tillage system and controlled traffic systems for cotton is in its fourth year of evaluation. The study was extended one extra year to verify yield results obtained in the 1998 crop year. The original hypothesis included reduced energy, improved soil condition, no disease differences, no nutrient differences and no yield differences. Of these hypothesis all are true except for yield differences. In years 1 and 2, no yield difference could be measured between stalk embedding and normal stalk disposal systems. However…
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Vern J. Elliott USDA-ARS
Shafter Research and Extension Center
17053 N. Shafter Ave. Shafter, CA 93263
(661) 746-8003
Fax (661) 746-1619
vjelliott@ucdavis.edu
Sticky cotton, the contamination o f cotton lint by insect honeydew, is a serious problem that makes it difficult for the textile industry to process the cotton fiber. This stickiness reduces the price paid to the grower and damages the quality reputation of entire production areas. Although insect management is playing the major role in reducing or preventing sticky cotton, remedial measures to reduce the stickiness of contaminated lint are still needed. Bioremediation, the use of microorganisms to degrade the contaminating sugars, may offer an economical and effective way to reduce the stickiness of lint.
Objectives of the current USDA ARS project are to examine the ability o f different strains o f yeast to utilize the sugars in insect honeydew, to select strains…
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U. S. Cotton Research Station
Agriculture Research Service
U. S. Department of Agriculture
17053 Shafter Avenue
Shafter, California 93263
Telephone: (805) 746-6391
Facsimile: (805) 746-1619
This report contains published and unpublished information concerning work in progress. The unpublished contents of this report may not be published or reproduced in any form without the prior consent of the scientific research staff involved.
Trade names and company names are included for the benefit of the reader and do not constitute an endorsement by the U. S. Department of Agriculture.
INTRODUCTION
The U. S. Cotton Research Station Annual Research Report is intended to
inform upper level management within the Agricultural Research Service, other ARS research locations involved in natural resources research, and our many collaborators and cooperators about progress made on our research projects in 1990 and plans for 1991.
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