Abstract
Laboratory studies on the seed powder and water extract of seeds of Cassia tora and Cassia uniflora on the germination of Parthenium seeds was studied. Seed powders of both weeds were much inhibitory on seed germination of Parthenium than the water extract. Seed powder of Cassia tora showed maximum germination inhibition of 98% and water extract of 67%, whereas seed powder of C. uniflora showed germination inhibition of 95% and water extract of 61%. The results showed that the C. tora seed powder and water extract of its seeds showed much inhibitory effect than C. uniflora on Parthenium. Key words: Cassia tora, Cassia uniflora, seed extract; Parthenium hysterophorus.
Highlights
In plant protection, allelochemicals play a vital role
Of these various ways, weed-weed interaction is an important phenomenon which was observed in case of Cassia uniflora and Cassia tora dominates on Parthenium and Achyranthus aspera dominates on C. uniflora
Water extract of seeds of C. tora and C. uniflora was prepared by distilling the seed powder with water in a Soxhlet distillation apparatus
Summary
Allelopathic effects of Cassia tora and Cassia uniflora on Parthenium hysterophorous L. Laboratory studies on the seed powder and water extract of seeds of Cassia tora and Cassia uniflora on the germination of Parthenium seeds was studied. Seed powders of both weeds were much inhibitory on seed germination of Parthenium than the water extract. P. hysterophorous L. commonly called congress grass is a vigorous colonist in poor and overgrazed pastures and readily occupies bare areas where stock movement is frequent. It does not invade most well managed crops and pastures, but may be a problem even when present at low levels.
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