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Effects of Temperature and Exposure Period to Heat on Cogongrass (Imperata Cylindrica) Viability

Published online by Cambridge University Press:  20 January 2017

Charles T. Bryson ,
Clifford H. Koger  and
John D. Byrd Jr
Charles T. Bryson*
Affiliation:
USDA-ARS, Southern Weed Science Research Unit, Stoneville, MS
Clifford H. Koger
Affiliation:
USDA-ARS, Crop Genetics and Production Research Unit, Stoneville, MS 38776
John D. Byrd Jr
Affiliation:
Department of Plant and Soil Sciences, Mississippi State University, Mississippi State, MS 38751
*
Corresponding author's E-mail: cbryson@ars.usda.gov
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Abstract

Cogongrass, a rhizomatous perennial, is among the world's most troublesome weeds. Research was conducted at the Southern Weed Science Research Unit, Stoneville, MS, to determine cogongrass rhizome mortality with increasing temperature and duration of exposure to heat and to determine if 2,3,5 triphenyl tetrazolium chloride (TTC) could be used to evaluate cogongrass rhizome mortality following heat treatment. Cogongrass rhizome mortality was 100% at 65, 79, 93, 107, 121, 149, 177, and 187 C at time periods greater than or equal to 25, 5, 2.5, 2.5, 2.5, 2, 2 and 1 min, respectively. The duration of heat required for cogongrass mortality decreases as temperature increased. The standard greenhouse bioassay was more effective than tetrazolium chloride in predicting viability of cogongrass rhizomes following heat treatments.

Keywords

Cogongrass, Imperata cylindrica (L.) Beauv. IMPCYAsphalt plantheat mortalitytetrazolium chloride
Type
Research
Information
Weed Technology , Volume 21 , Issue 1 , March 2007 , pp. 141 - 144
Copyright
Copyright © Weed Science Society of America 

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