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Updated: Sep 13, 2026

Repeatable Stair-step Assay to Access the Allelopathic Potential of Weedy Rice (Oryza sativa ssp.)
Published on: January 28, 2020
Toxicity of a rice field herbicide in some nitrogen-fixing algae
A S Ahluwalia1, M Kaur, S Dahuja
1Department of Botany, Punjab University, Chandigarh.
Abstract:
The incorporation of diquat into cultures of Nostoc muscorum and Cylindrospermum sp. Proved to be highly toxic. The range of various concentrations employed varies from 1 microgram/ml 15 micrograms/ml. Relatively higher does (above 5 micrograms/ml) reduced the chlorophyll a content and a progressive decrease in algal growth and ultimately complete lysis of the cells was recorded with the increasing level of the herbicide. A concentration of 15 micrograms/ml has been found to be algicidal for both the test organism.
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