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Phytotoxicity of Endothall on Peanut (Arachis hypogaea): Formulation, Rate, and Time of Application

Published online by Cambridge University Press:  12 June 2017

W. Carroll Johnson III ,
Daniel L. Colvin  and
Benjamin G. Mullinix Jr.
W. Carroll Johnson III
Affiliation:
U.S. Dep. Agric.-ARS
Daniel L. Colvin
Affiliation:
Univ. Florida
Benjamin G. Mullinix Jr.
Affiliation:
Univ. of Georgia, Coastal Plain Exp. Stn., Tifton, GA 31793-0748
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Abstract

Field studies were conducted at Tifton, GA and Gainesville, FL to quantify the phytotoxicity of endothall formulation, rate, and time of application on peanut in a weed-free experiment. Peanut treated with mono (N,N-dimethylalkylamine) salt of endothall (DMAA endothall) were more necrotic than those treated with dipotassium salt of endothall (DP endothall), though necrosis was temporary. Injury from DMAA endothall at rates of 0.6 to 1.1 kg ai/ha was similar to the standard treatment of bentazon plus paraquat for most parameters. Peanut treated with the highest rate of DMAA endothall (4.5 kg/ha) were more necrotic and took longer to recover than lower rates. The highest rate of DP endothall (4.5 kg ai/ha) stunted peanut more than any DMAA endothall treatment. However, lower rates of DP endothall (0.6 to 2.2 kg/ha) were generally less injurious than DMAA endothall at equivalent rates. Peanut yields were not affected by either formulation of endothall at 0.6 to 1.1 kg/ha, applied from vegetative emergence through 4 wk after emergence.

Keywords

Bentazon, 3-(1-methylethyl)-(1H)-2,1,3-benzothiadiazin-4(3H)-one 2,2-dioxideendothall, 7-oxabicyclo[2.2.1]heptane-2,3-dicarboxylic acidparaquat, 1,1′-dimethyl-4-4′-bipyridinium ionpeanut, Arachis hypogaea L. ‘Florunner’ and 'Sunrunner.’Peanut injuryphytotoxicitydipotassium salt of endothallmono (N,N-dimethylalkylamine) salt of endothall
Type
Research
Information
Weed Technology , Volume 8 , Issue 4 , December 1994 , pp. 738 - 743
Copyright
Copyright © 1994 Weed Science Society of America 

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