Reniform Nematode Control in Arkansas

T.L. Kirkpatrick, S.M. Culp, and S. Taylor


Results of a two year study to determine the efficacy of nematicides for reniform nematode (Rotylenchulus reniformis) control in cotton were reported. The study was conducted in a field in Monroe County, AR, with a history of cotton monoculture, and a relatively high population density of reniform nematodes. Nematicide treatments included aldicarb (Temik 15 G) and fenamiphos (Nemacur 15 G) at 7.0 lb/acre applied in furrow at planting and 10.0 lb/acre incorporated into a 7-inch band at planting in 1992. In 1993 only Temik 15 G was studied and application rates of 3.5, 5.0, and 7.0 in-furrow were used. In 1992 at planting population densities of R. reniformis ranged from 552-804 nematodes/500 cm3. At harvest population densities ranged from 32,963-47,113 nematodes/500 cm3, but no significant differences were found among treatments. In 1992 treatment with Temik 15 G at 10.0 lb/acre resulted in plants that were taller at harvest and Nemacur 15 G at 10.0 lb/acre resulted in plants that were significantly shorter at harvest than other treatments. No significant differences were found among treatments in seedcotton yield in 1992. In 1993 preplant nematode densities ranged from 12,616-16,328 R. reniformis/500 cm3 soil. All Temik treatments resulted in significantly lower population densities at harvest than in the untreated control plots. Nematicide treatments did not affect plant height at harvest in 1993, and no significant differences in seedcotton yield was found among treatments.

Reprinted from Proceedings of the 1994 Beltwide Cotton Conferences pg. 275
©National Cotton Council, Memphis TN

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Document last modified Sunday, Dec 6 1998