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AssigneeBoard of Supervisors of Louisiana State University and Agricultural and Mechanical College
InventorsDonald E. Groth, Dearl E. Sanders
Estimating the term…
A previously unsuspected cause of herbicide-induced phytotoxicity in rice is disclosed, as is a successful treatment for the problem. Fungi are responsible for dehalogenating halogenated aromatic herbicides. The dehalogenated aromatic compounds then cause serious injury to growing rice plants. The problem has been overcome by treating the herbicide with a fungicide. When fungal metabolism of the herbicide is thus inhibited, the herbicide is not dehalogenated, and the herbicide does not injure rice plants. In a preferred embodiment, the fungicide iprodione was impregnated onto the herbicide thiobencarb, greatly reducing the induced phytotoxicity of the herbicide thiobencarb, without substantially affecting the desired herbicidal activity of thiobencarb.
A composition of matter useful for controlling weeds in a rice field without inducing substantial phytotoxicity in rice plants, said composition comprising a mixture of a halogenated aromatic herbicide suitable for use in a rice field, and a fungicide, wherein the concentration of said fungicide is sufficient to inhibit fungal dehalogenation of said halogenated aromatic herbicide.
A process for controlling weeds in a rice field without inducing substantial phytotoxicity in rice plants;
Dependencies are inferred from the claim text.