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Germination and Establishment of Prostrate Spurge (Euphorbia supina)

Published online by Cambridge University Press:  12 June 2017

Robert R. Krueger  and
Dale L. Shaner
Robert R. Krueger
Affiliation:
Dep. Bot. and Plant Sci., Univ. of California, Riverside, CA 92521
Dale L. Shaner
Affiliation:
Dep. Bot. and Plant Sci., Univ. of California, Riverside, CA 92521
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Abstract

Germination of prostrate spurge (Euphorbia supina Raf.) seeds collected in August, September, October, and November 1977 at Riverside, California was 53, 30, 18, and 16%, respectively. Stratification of seeds collected in August, September, and October at 5 C for 3 weeks or more increased germination to 70 to 80%. Prostrate spurge seeds germinated at constant temperatures of 20 to 40 C, with optimum temperatures of 25 to 30 C. Maximum germination occurred under alternating temperatures with a high temperature of 30 to 35 C and a low temperature of 15 to 25 C. Germination in the dark was much lower than in the light. Seedling establishment of seeds collected in August sown at 0.0- to 0.5-cm depths was 30 to 35%, but establishment from 2 cm declined to near 0%. Light intensity did not affect the number of seedlings established, but the seedlings established were larger under higher light intensities.

Keywords

Seedsenvironmental responses
Type
Research Article
Information
Weed Science , Volume 30 , Issue 3 , May 1982 , pp. 286 - 290
Copyright
Copyright © 1982 by the Weed Science Society of America 

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References

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