Command 4EC Herbicide - Potential Uses in Cotton

D. R. EDWARDS and H. R. Mitchell


 
ABSTRACT

Command 4EC herbicide provides control of a wide spectrum of grass and broadleaf weeds in soybeans and has shown potential for use on cotton in recent years. Command applied at planting in conjunction with Thimet (phorate), a currently labeled cotton insecticide, significantly reduced phytotoxicity to emerging cotton. Thimet applied in-furrow at 1.0 lb ai/A reduced bleaching of cotton for Command (1.0 lb ai/A) applied PPI and PRE by 71 and 86%, respectively. Thimet applied as a seed treatment at 0.8 oz/cwt resulted in acceptable safening for Command applied PRE at 0.5 lb ai/A but higher Command rates or application as a PPI resulted in unacceptable phytotoxicity. DiSyston also shows promise as a safener but Orthene 75S as a seed treatment at 6.4 oz/cwt was ineffective in safening cotton against Command. Differences in Command sensitivity among cotton cultivars tested were minimal. Thimet (1.0 lb ai/A) applied in-furrow resulted in adequate safening of all cotton cultivars tested. Grass and broadleaf weed control was good with no reduction in control due to the presence of Thimet. Thus, Thimet can effectively safen cotton against Command thereby allowing cotton producers to take advantage of the broad spectrum weed control provided by Command.



Reprinted from Proceedings: 1989 Beltwide Cotton Research Conferences pp. 379 - 381
©National Cotton Council, Memphis TN

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Document last modified Sunday, Dec 6 1998