Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Efficacy of chemical weedicide and bio weedicides against Parthenium hysterophorus.

Abstract

Parthenium hysterophorus is a noxious weed in many parts of the world including India. It may cause allergic respiratory problems, contact dermatitis, mutaganicity in human and live stock. Crop production is drastically reduced by its allelopathy. Also its aggressive dominance threatens biodiversity. Hence an integrated approach is necessary for its effective control. An experiment was carried out in laboratory of Kalaburagi University, Karnataka, India to study the effect of a chemical herbicide named Ammonium salt of Glyphosate 71% SG, aqueous plant extract of Cassia sericea as bio herbicide and commercially available Eucalyptus oil on the seeds of Parthenium hysterophorus which are collected from different parts of the Kalaburagi Karnataka. The 20 seeds of parthenium were placed in each sterile petri plates of 10 cm diameter with Whatman filter paper in it. The seeds are supplied with Ammonium salt of Glyphosate 71% SG. chemical solution of concentration 0.001%, 0'002%, 0.05%, 0.01%, 0.02%. and same concentration of Eucalyptus oi, and alsol aqueous extract of Cassia sericea of concentration of 1%, 5%, 10%, 25%, 50% are observed to study the germination%, and Inhibition% of Parthenium seeds. The study revealed that as concentration of chemical herbicide increases the rate of germination of Parthenium seeds decreases. The highest inhibition (100%) was seen in 0.01, and 0.02% concentration and lowest is seen in 0.001% (86%)of chemical herbicide. And The plant extract of Cassia sericea also found to be inhibitory. The inhibition was maximum in 25%, 50%(100%) of cassia seresia whole plant extract. Also Eucalyptus oil showed inceased inhibitory effect as concentration increases. Inhibitory effect is maximum in 0.05%, 0.01%, and 0.02% So we can conclude that, plant extract of Cassia sercia and Eucalyptus oil has inhibitory effect on Parthenium seeds. The use of these plant extract, plant oil are more effective and eco friendly to contol Partenium hysterophorus. The allelopathic potential of plant extract of Cassia serecia and Eucalyptus oil could be exploited for parthenium weed management. In order to conclude meaningful results further research is suggested to investigate feasibility of commercial use of the plant extract and plant oils as bio herbicide.