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Screening Procedures to Identify Soil-Borne Actinomycetes That Can Produce Herbicidal Compounds

Published online by Cambridge University Press:  12 June 2017

Joseph DeFrank
Affiliation:
Michigan State Univ. Dep. Hortic., Univ. of Hawaii, Honolulu, HI 96822
Alan R. Putnam
Affiliation:
Dep. Hortic. and Pestic. Res. Ctr., Michigan State Univ., E. Lansing, MI 44824

Abstract

An isolation and screening procedure was developed to identify soil actinomycetes that can produce germination and growth inhibitors on agar plates. Eight of 120 isolates tested demonstrated severe toxicity on cress (Lepidium sativum L. ‘Curly’) and barnyardgrass [Echinochloa crus-galli (L.) Beauv. ♯ ECHCG]. Several isolates were observed to stimulate growth. In replicated tests using the agar screening procedure, compounds produced by microorganisms significantly inhibited germination and growth of indicator plants. Organisms shown to produce toxins in agar media did not always produce toxins when grown in submerged culture.

Type
Special Topics
Copyright
Copyright © 1985 by the Weed Science Society of America 

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References

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