Journal of Nematology (2005) 37, p. 368 (Ellis et al.)

G.R. Ellis, G.W. Lawrence, S. Samson, W.A. Givens and K.S. Lawrence (2005)
Variable-rate applications of Telone II on cotton for reniform nematode management
Journal of Nematology 37 (3), 368-368
44th Annual Meeting, Society of Nematologists, Fort Lauderdale, Florida, 9-13 July, 2005
Abstract: An experiment was conducted in a cotton field naturally infested with reniform nematodes. The field was located near Natchez, MS, and was approximately 20 acres in size. Soil samples were collected on a one-quarter acre grid to determine initial nematode populations. The populations ranged from 774 to 11,352 nematodes/500 cm³ soil. A distribution map was generated from the population levels, which served as the prescription map for the variable rate applications. Three threshold classes were developed from the interpolated map, which included low (700 to 3,000 nematodes), medium (3,000 to 6,000 nematodes), and high (6,000 to 12,000 nematodes). These thresholds were used to indicate which level of nematicide would be applied to the different zones. Telone II was applied at uniform rates of 1.5, 3, and 5 gallons/acre and a variable rate application of 1.5 to 5.0 gallons/acre depending on the degree of nematode infestation. Temik 15G was also applied at a rate of 4 pounds/acre for the control treatment. The conventional rate of Telone II at 5 gallons/acre produced the greatest seed cotton yield at 2,235 pounds per acre. The conventional rate of 3 gallons/ acre and the variable rate applications were very similar, yielding 2,105 and 2,091 pounds/acre, respectively. The variable rate application rate averaged 3 gallons/acre. This could explain the similarity in the yields between the two treatments. The variable rate applications were successful because rates as high as 5 gallons/acre were applied and net returns were comparable to the 3 gallons/acre conventional rate application. Further research is being performed in order to maximize the efficiency of variable rate nematicide applications.
Database assignments for author(s): Kathy S. Lawrence

Research topic(s) for pests/diseases/weeds:
control - general

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Rotylenchulus reniformis	Cotton (Gossypium)	U.S.A. (mid S)