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The Influence of Environmental Factors on Oryzalin Activity

Published online by Cambridge University Press:  12 June 2017

James E. Nelson ,
William F. Meggitt ,
Donald Penner  and
James S. Ladlie
James E. Nelson
Affiliation:
Agri-Growth Res. Inc., South Bend, IN 46628
William F. Meggitt
Affiliation:
Pestic. Res. Ctr., Dep. Crop and Soil Sci., Michigan State Univ., East Lansing, MI 48824
Donald Penner
Affiliation:
Pestic. Res. Ctr., Dep. Crop and Soil Sci., Michigan State Univ., East Lansing, MI 48824
James S. Ladlie
Affiliation:
Agri-Growth Res. Inc., Hollandale, MN 56045
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Abstract

Effects of temperature, sunlight, soil incorporation and surface irrigation on the phytotoxicity of oryzalin (3,5-dinitro-N4,N4 -dipropylsulfanilamide) were studied. The activity of oryzalin applied 4 to 6 weeks prior to planting was enhanced by covering the soil with plastic as measured by the inhibition of grain sorghum [Sorghum bicolor (L.) Moench. 'Sexauer G-701′] root growth. Growth chamber studies demonstrated that oryzalin phytotoxicity to grain sorghum was greater at 20 and 25 C than at 30C. The control of foxtail millet [Setaria italica (L.) Beauv. #5 SETIT] bristly foxtail [Setaria verticillata (L.) Beauv. # SETVE], redroot pigweed (Amaranthus retroflexus L. # AMARE), and smooth pigweed (Amarantbus hybridus L.), and injury to grain sorghum increased as the thoroughness of mechanical incorporation of oryzalin into soil increased. The phytotoxicity of surface-applied oryzalin increased with increasing amounts of irrigation water until it equaled the level of a preplant-incorporated treatment.

Keywords

Irrigationincorporationtemperaturephoto-decompositionSorghum bicolorGlycine maxAmaranthus hybridusSETITSETVEAMARE
Type
Research Article
Information
Weed Science , Volume 31 , Issue 5 , September 1983 , pp. 752 - 758
Copyright
Copyright © 1983 Weed Science Society of America 

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References

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