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Influence of Rate, Method of Application, and Tillage on Imazaquin Persistence in Soil

Published online by Cambridge University Press:  12 June 2017

K. A. Renner ,
W. F. Meggitt  and
R. A. Leavitt
K. A. Renner
Affiliation:
Dep. Crop and Soil Sci., Michigan State Univ., East Lansing, MI 48824
W. F. Meggitt
Affiliation:
Dep. Crop and Soil Sci., Michigan State Univ., East Lansing, MI 48824
R. A. Leavitt
Affiliation:
Pestic. Res. Ctr., Michigan State Univ., East Lansing, MI 48824
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Abstract

Preplant-incorporated (PPI) applications of 280 g ai/ha of imazaquin {2-[4,5-dihydro-4-methyl-4-(1-methylethyl)-5-oxo-1H-imidazol-2-yl]-3-quinolinecarboxylic acid} had significantly greater persistence than preemergence surface (PES) applications throughout the growing season in 1985. In 1984 there was no statistical difference in imazaquin remaining between PPI and PES treatments. Very little imazaquin was detected below 10 cm in the soil profile for all sampling dates each year. Imazaquin dissipated rapidly both years during the first 30 days following PPI and PES applications. A subsequent decrease in the dissipation rate occurred in the next 120 days of the growing season. Spring tillage had no significant effect on injury to corn (Zea mays L.) planted into the field the year following imazaquin application. Corn planted in 1986 into imazaquin-treated plots of 1985 had no growth reduction when compared to corn grown in plots where zero imazaquin had been applied. However, corn planted in 1985 into imazaquin applications of 1984 had significant injury. Greatest injury occurred where imazaquin had been incorporated, and injury increased as imazaquin rate was increased.

Keywords

AC-252,214imidazolinonepesticide degradationherbicide movementherbicide mobilitypesticide residuesconcentration effect
Type
Soil, Air, and Water
Information
Weed Science , Volume 36 , Issue 1 , January 1988 , pp. 90 - 95
Copyright
Copyright © 1988 by the Weed Science Society of America 

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