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United States Department of Agriculture

Agricultural Research Service

Title: Cotton Variety - Reniform Nematode Interaction Test - 1997

Authors
item Cook, Charles
item Robinson, Arin

Submitted to: Texas Agricultural Extension Service Regional Report
Publication Type: Other
Publication Acceptance Date: February 2, 1998
Publication Date: N/A

Interpretive Summary: Reniform nematodes often cause lint yield losses in excess of 40%. In 1997, 19 experimental strains and five commercial cotton varieties were evaluated in nematode-infested and Telone II-treated experimental plots. Planting date was March 27, 1997 and harvest dates were July 29, August 5, and August 19. Across the two treatments, eight experimental strains, X2113-27, ,X2118-32, X2140-8 (United Ag Products), LGQWILBCGS-1-95, PD22CUBQWS-1-95 (TAES-MAR), and C429-93, C95483, C953109 (USDA-ARS), were observed to produce significantly greater yields than the commercial varieties, Deltapine 5409, Tamcot Sphinx, Stoneville 474, and Stoneville LA887. Fiber quality of the experimental strains and varieties ranged from good to excellent. Several of the newly developed experimental strains produced lint yields that were greater than the commercial standards when grown in reniform-nematode infested and noninfested soils.

Technical Abstract: Reniform nematodes, which are often present in the soils of the Lower Rio Grande Valley (LRGV), can cause severe yield losses. Reniform nematodes have been observed to cause lint yield losses in excess of 40% in the LRGV. Because of the wide host range of reniform nematodes and the ability to survive deep within the soil profile, control measures using crop rotations sand nematicides are often inadequate or not economical. In 1997, nineteen experimental strains and five commercial cotton varieties were evaluated in nematode-infested and Telone II-treated soils. The commercial varieties included in the study were 'Deltapine 5409', 'Stoneville LA887', 'Stoneville 474', 'Stoneville 132', and 'Tamcot Sphinx'. Planting date was March 27, 1997. Sequential harvest dates were July 29, August 5, and August 19. Across the two treatments, eight experimental strains, X2113-27, X2118-32, X2140-8 (United Ag Products), LGQWILBCGS-1-95, PD22CUBQWS-1-95 (TAES-MAR), and C429-93, C95483, C953109 (USDA-ARS), produced significantl greater yields than the commercial varieties, Deltapine 5409, Tamcot Sphinx, Stoneville 474, and Stoneville LA887. In general, fiber quality of the experimental strains and varieties ranged from good to excellent. Results indicate that several of the newly developed experimental strains can produce lint yields that are greater than the commercial standards when grown in reniform-nematode infested and noninfested soils.

Last Modified: 12/19/2014
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