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Calculating the Threshold Temperature of Development for Weeds

Published online by Cambridge University Press:  12 June 2017

Ann M. Wiese
Affiliation:
Dep. Hortic., Univ. Wisconsin, Madison, WI 53706
Larry K. Binning
Affiliation:
Dep. Hortic., Univ. Wisconsin, Madison, WI 53706

Abstract

Weed seeds were germinated in incubators at constant temperatures ranging from 4 to 32 C increments. Percent germination per day was regressed against temperature with the x-intercept representing the low threshold temperature for development. Low threshold temperatures for development (low TTD's) calculated for wild proso millet (Panicum miliaceum L. # PANMI), barnyardgrass [Echinochloa crus-galli (L.) Beauv. # ECHCG], common lambsquarters (Chenopodium album L. # CHEAL), and redroot pigweed (Amaranthus retroflexus L. # AMARE) were 6.9, 9.7, 6.0, and 10.0 C, respectively.

Type
Weed Biology and Ecology
Copyright
Copyright © 1987 by the Weed Science Society of America 

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References

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