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Enhanced Activity of Nicosulfuron in Combination with Soil-Applied Insecticides in Corn (Zea mays)

Published online by Cambridge University Press:  12 June 2017

Anis Rahman  and
Trevor K. James
Anis Rahman
Affiliation:
Weed Research Group, Ruakura Agricultural Centre, Private Bag, Hamilton, New Zealand
Trevor K. James
Affiliation:
Weed Research Group, Ruakura Agricultural Centre, Private Bag, Hamilton, New Zealand
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Abstract

Field experiments were conducted to determine the occurrence and the extent of interaction among four soil-applied organophosphate insecticides and the sulfonylurea herbicide nicosulfuron applied POST to corn. Nicosulfuron was damaging to corn when the crop was planted with terbufos, phorate, or fonofos applied into the open furrow. Terbufos was the most damaging and also caused damage when applied as a 17-cm band prior to or after closing the furrow, with or without incorporation. Phytotoxic symptoms appeared within 3 d of application of nicosulfuron and damage increased as the rate was increased from 53 g ai/ha to 140 g ai/ha. However, despite severe damage of up to 50% recorded in some terbufos combinations, all plants had completely recovered within 4 wk and none of the treatments had any effect on grain yield or crop maturity. No damage resulted from nicosulfuron when corn was planted with the insecticide chlorpyrifos. Efficacy data of nicosulfuron on the main weeds present are also reported.

Keywords

Chlorpyrifos, O,O-diethyl O-3,5,6-trichloro-2-pyridinyl phosphorothioatefonofos, O-ethyl 5-phenyl (RS)-ethylphosphonodithioatenicosulfuron, 2-[[[[(4,6-dimethoxy-2-pyrimidinyl)-fonyl]-N,N-dimethyl-3-pyridinecarboxamidephorate, O,O-diethyl S-ethylthiomethyl phosphorodithioateterbufos, S–tert–butylthiomethyl O,O-diethyl phosphorodithioatecorn, Zea mays L.Interactioncrop injuryherbicide damageDPX-V9360sulfonylureaorganophosphatepostemergence
Type
Research
Information
Weed Technology , Volume 7 , Issue 4 , December 1993 , pp. 824 - 829
Copyright
Copyright © 1994 by the Weed Science Society of America 

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