Role of Allelopathy for Suppression of Parthenium hysterophorus: A Review

Abstract

Gajjar grass, Parthenium hysterophorus L., from the family Asteraceae (tribe: Heliantheae), is a vertical and densely branched annual herb well-known for its environmental, medical, and agricultural hazard. It is thought to have been familiarized into India and Australia from North America and in the previous few years the weed has appeared as the utmost distressing weed in Africa, Asia, and Australia. Many scientists employed biological methods like insects, fungi, trees and crop plants which were creating harm to P. hysterphorus, but found the allelopathy as the most efficient method to control the parthenium as well as other weeds. Scientists are doing experiments to use allelopathic potential of plants for weed management. It has been shown in researches that the extracts and residues of many allelopathic plant species (herbs, grasses and trees) effectively reduce the germination and growth of parthenium. The purpose of this review is to summarize all the general information about biological management of this noxious weed. Parthenium control has been attempted using a variety of methods, but no sole administration choice would be suitable to cope Parthenium, and there is a need to assimilate numerous management choices. The only way to successfully manage this weed is through a comprehensive mechanism that includes bio-control as a major component.

Plant Allelopathy in Agriculture and Its Environmental and Functional Mechanisms: A Review

“…Allelopathic cultivars have great potential to minimize the efficiently control weeds in farmland ecosystems with application of allelopathy as described by Jamil et al [18]. However, a negative effect was that the grain yield was reduced by 9% in the high allelopathic lines [19,20].…”