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Herbicides for Control of Leptochloa panicoides in Water-Seeded Rice

Published online by Cambridge University Press:  12 June 2017

R. J. Smith Jr.
R. J. Smith Jr.*
Affiliation:
Agr. Res. Serv., U.S. Dep. of Agr., Stuttgart, AR 72160
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Abstract

Postemergence herbicide treatments that controlled tighthead sprangletop [Leptochloa panicoides (Presl) Hitchc.] and redstem (Ammannia auriculata Willd.), did not injure water-seeded rice (Oryza sativa L.), and substantially improved grain yields included: (a) a single application of propanil (3′,4′-dichloropropionanilide) at 4.5 kg/ha applied to weeds 8- to 10-cm tall; (b) two sequential treatments of propanil each at 3.4 kg/ha, with the first treatment applied to weeds 2- to 5-cm tall, and a second treatment applied 4 to 8 days later; (c) a tank mixture of propanil at 3.4 kg/ha and 2,4,5-T [(2,4,5-trichlorophenoxy)acetic acid] at 0.6 kg/ha, applied to weeds 8- to 10-cm tall; and (d) a tank mixture of propanil and molinate (S-ethyl hexahydro-1H-azepine-1-carbothioate), each at 2.2 kg/ha, applied to weeds 8- to 10-cm tall. Treatments that controlled tighthead sprangletop or redstem unsatisfactorily or inconsistently and did not improve grain yields as much as more effective treatments included: preplant or postemergence treatments of molinate, or preplant treatments of nitrofen (2,4-dichlorophenyl-p-nitrophenyl ether), fluorodifen (p-nitrophenyl α,α,α-trifluoro-2-nitro-p-tolyl ether), CNP (2,4,6-trichlorophenyl-p-nitrophenyl ether), or He-314 (p-nitrophenyl-m-tolyl ether).

Type
Research Article
Information
Weed Science , Volume 23 , Issue 1 , January 1975 , pp. 36 - 39
Copyright
Copyright © 1975 by the Weed Science Society of America 

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References

Literature Cited

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