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Response of Transplanted Watermelon (Citrullus lanatus) to Ethalfluralin Applied PPI, PRE, and POST

Published online by Cambridge University Press:  12 June 2017

Wayne E. Mitchem ,
David W. Monks  and
Robert J. Mills
Wayne E. Mitchem
Affiliation:
Department of Horticultural Science, North Carolina Stale University, Raleigh, NC 27695-7609
David W. Monks
Affiliation:
Department of Horticultural Science, North Carolina Stale University, Raleigh, NC 27695-7609
Robert J. Mills
Affiliation:
Department of Horticultural Science, North Carolina Stale University, Raleigh, NC 27695-7609
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Abstract

Field experiments conducted in 1992 and 1993 evaluated transplanted watermelon tolerance to ethalfluralin applied PPI, PRE (before transplanting), and POST (immediately after transplanting) at 1.2 or 2.4 kg ai/ha. Other treatments for comparison included the registered herbicides ethalfluralin POST-directed spray (PDS), ethalfluralin PDS followed by (fb) naptalam POST, bensulide plus naptalam PPI, and a nontreated check. All treatments controlled common lambsquarters and goosegrass 83 to 100% 2 and 6 weeks after treatment (WAT). Watermelon was injured 30 to 77% in 1992 and 14 to 83% in 1993 by ethalfluralin PPI or PRE at 1.2 or 2.4 kg/ha. Ethalfluralin POST was not injurious to watermelon. In 1992, watermelon treated with ethalfluralin POST at 1.2 and 2.4 kg/ha yielded 52 to 62% more fruit than watermelon from the nontreated check. In 1993, yield of transplanted watermelon treated with ethalfluralin POST was similar to that in the nontreated check.

Keywords

Bensulide, O, O-bis(1-methylethyl) S-[2-[(phenylsulfonyl)amino]ethyl] phosphorodithioateethalfluralin, N-ethyl-N-(2-methyl-2-propenyl)-2,6-dinitro-4-(trifluoromethyl)benzenaminenaptalam, 2-[(1-naphthalenylamino)carbonyl]benzoic acid (sodium salt)common lambsquarters, Chenopodium album L. # CHEALgoosegrass, Eleusine indica (L.) Gaertn. # ELEINwatermelon, Citrullus lanatus L.Weed controlherbicide injuryyieldChenopodium albumEleusine indicaCHEALELEINfb, followed byPDS, postemergence directed spray
Type
Research
Information
Weed Technology , Volume 11 , Issue 1 , March 1997 , pp. 88 - 91
Copyright
Copyright © 1997 by the Weed Science Society of America 

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References

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