A review of the spider-mite problem on grain sorghum and corn in West Texas

Ehler, L.E. (1974) A review of the spider-mite problem on grain sorghum and corn in West Texas. Other. Texas A&M University System, Texas, USA.

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Surveys in western Texas during 1972-73 showed that maize was infested by Oligonychus pratensis (Banks), O. stickneyi (McG.) and Tetranychus urticae Koch and grain sorghum by O. pratensis, T. urticae and T. cinnabarinus (Boisd.). The development or introduction of a new biotype (presumably of O. pratensis, the most common species on both crops) was apparently the cause of recent spider-mite outbreaks on the two crops. The occurrence of outbreaks was closely related to the reproductive maturity of plants and appeared to be temporally and spatially separated from populations of natural enemies. In general, economic infestation levels were not always the result of pesticide treatments. It is thought that the use of artificial control measures (including those directed against other pests) that impose harsh selective pressures on spider-mite populations (especially pesticides and resistant food-plants) may provide a short-term remedy but should not be expected to provide a long-term solution

Item Type: Monograph (Other)
Author Affiliation: Department of Entomology, Texas Agricultural Experiment Station, Texas A&M University System, College Station, USA
Subjects: Plant Protection
Divisions: Maize
Depositing User: Ms K Syamalamba
Date Deposited: 26 Jul 2012 08:13
Last Modified: 26 Jul 2012 08:14
URI: http://eprints.icrisat.ac.in/id/eprint/7005

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