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Influence of Row Spacing and Tillage Upon Western Flower Thrips and Tobacco Thrips in Cotton

Henry M. Harris, W.K. Vencill and J. N. All


 
ABSTRACT

Thrips are very detrimental to the growth of a cotton crop. The feeding damage caused by the two prevalent thrips species found in Georgia, Western Flower Thrips and Tobacco Thrips, causes severe economic loss to farmers because of damage incurred by cotton seedlings, and yield is negatively affected. During the 1998 growing season field experiments were performed in order to ascertain the differences in thrips populations under varying tillage systems and row spacing widths. Thrip adults and larvae were found in lower population densities in tillage systems utilizing a no-till system consisting of wheat residue and stubble. Ultra-narrow-row cotton production systems are theoretically more susceptible to thrips injury, as is make evident by the higher population levels found in UNRC as compared to cotton grown in rows thirty inches wide. This experiment helped to further solidify the fact that Temik does have an important role in suppression of thrips populations. Differences in thrips populations were not observed between Roundup Ready weed management scenarios utilizing a residual chemical weed control component and a stand alone Roundup Ready weed control system.



Reprinted from Proceedings of the 1999 Beltwide Cotton Conferences pp. 974 - 976
©National Cotton Council, Memphis TN

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Document last modified Monday, Jun 21 1999