Alopathic Efect on Weeds

Allelopathic
Allelopathy is the detrimental effects of chemicals or exudates produced by one (living) plant species on the germination, growth or development of another plant species (or even microorganisms) sharing the same habitat.
Allelopathic Effect of crop plants on weeds
(i) Root exudation of maize inhibits the growth of Chenopodium album
(ii) The cold-water extracts of wheat straw when applied to weeds reduce germination and growth of Abutilon sp.
Allelopathic effect of weeds on weeds
• Extract of leaf leachate of decaying leaves of Polygonum contains flavonoides which are toxic to germination, root and hypocotyls growth of weeds like Amaranthus spinosus
• Inhibitor secreted by decaying rhizomes of Sorghum halepense affect the growth of Digitaria sanguinalis and Amaranthus sp.
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