OBJCTIVE The objective of this project its to evaluate the effects of various herbicides on water hyacinth control and to determine the impact on water quality and fish mortality. OUTPUT Results indicated that all the herbicides significantly controlled the growth parameters. Among the herbicides applied, glyphosate @ 2.50 Kg ha-1 shows highest reductions of weed growth parameters at both water bodies. Weed reduction by the herbicide 2, 4-D Na salt @ 1.50 kg ha-1 and Paraquat @1.50 kg ha-1 are on par in both water body. Among the herbicides used, application of glyphosate @ 2.50 Kg ha1 has shown least fish mortality percentage recorded at 32 DAS. Application of 2, 4-D Na salt@ 1.5 Kg ha-1 and paraquat @ 1.50 Kg ha-1 are on par in recording higher fish mortality percentages. Among the herbicide treated water, glyphosate applied water showed better germination percentage, when used for irrigation after 1 hour of herbicide application. Usage of herbicide treated water after 24 hours of application is observed to be safe for crops irrespective of all herbicides tested. Application of paraquat and 2, 4-D Na salt caused drastical reduction in water quality. Glyphosate application is better in terms of preserving water quality. The current project screened different herbicide to control water hyacinth. The project also investigated the residual activity of applied herbicide to control water hyacinth. The project also investigated the residual activity of applied herbicide on fishes, water quality and germination of commercial crops. Among the herbicides tried, glyphosate a broad spectrum, non-selective and systemic herbicide showed good control over water hyacinth and proved safe in terms of impact on water quality and non-target organisms and crop.
OBJCTIVE The objective of this project its to evaluate the effects of various herbicides on water hyacinth control and to determine the impact on water quality and fish mortality. OUTPUT Results indicated that all the herbicides significantly controlled the growth parameters. Among the herbicides applied, glyphosate @ 2.50 Kg ha-1 shows highest reductions of weed growth parameters at both water bodies. Weed reduction by the herbicide 2, 4-D Na salt @ 1.50 kg ha-1 and Paraquat @1.50 kg ha-1 are on par in both water body. Among the herbicides used, application of glyphosate @ 2.50 Kg ha1 has shown least fish mortality percentage recorded at 32 DAS. Application of 2, 4-D Na salt@ 1.5 Kg ha-1 and paraquat @ 1.50 Kg ha-1 are on par in recording higher fish mortality percentages. Among the herbicide treated water, glyphosate applied water showed better germination percentage, when used for irrigation after 1 hour of herbicide application. Usage of herbicide treated water after 24 hours of application is observed to be safe for crops irrespective of all herbicides tested. Application of paraquat and 2, 4-D Na salt caused drastical reduction in water quality. Glyphosate application is better in terms of preserving water quality. The current project screened different herbicide to control water hyacinth. The project also investigated the residual activity of applied herbicide to control water hyacinth. The project also investigated the residual activity of applied herbicide on fishes, water quality and germination of commercial crops. Among the herbicides tried, glyphosate a broad spectrum, non-selective and systemic herbicide showed good control over water hyacinth and proved safe in terms of impact on water quality and non-target organisms and crop.
INCID-MWR-%20Project%20Summary.docx