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Wild Poinsettia (Euphorbia heterophylla) Germination and Emergence

Published online by Cambridge University Press:  12 June 2017

Barry J. Brecke
Barry J. Brecke*
Affiliation:
Univ. Florida, Ag. Res. & Ed. Ctr., Jay, FL 32565
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Abstract

Wild poinsettia germination was at least 95% when exposed to solution pH of 2.5 to 10 or solution osmotic potential of up to −0.8 MPa. No germination was observed at pH 12 or osmotic potential of −1.5 MPa. Light was not required for germination. Seed germinated at temperatures ranging from 20 to 40 C with maximum germination of 97% at 35 C. Wild poinsettia had the highest emergence (80%) from seed placed 2 to 4 cm below the soil surface, while 20% of the seed planted at 14 cm emerged. Wild poinsettia germinated over a wide range of conditions, which explains why it is becoming an increasingly serious problem.

Keywords

Wild poinsettia, Euphorbia heterophylla L. #3 EPHHLWater stresspHtemperatureplanting depthEPHHL
Type
Weed Biology and Ecology
Information
Weed Science , Volume 43 , Issue 1 , March 1995 , pp. 103 - 106
Copyright
Copyright © 1995 by the Weed Science Society of America 

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References

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