A Field Test of Selected Insects and Pathogens for Control of Waterhyacinths PDF Download
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Author: Eugene E. Addor Publisher: ISBN: Category : Aquatic plants Languages : en Pages : 68
Book Description
During the 1975 growing season a field experiment was begun on Lake Concordia, La., to test the potential effectiveness of selected organisms as control agents against waterhyacinths, Eichhornia crassipes (Mart.) Solms. Floating frames, each approximately 2 m square, were anchored on the lake in open water and planted with locally growing waterhyacinths. Sixty of these frames (plots) were selected for treatment with various combinations of two insects (Arzama densa Walker and Neochetina eichhorniae Warner) and two fungi (Acremonium zonatum (Sawada) Gams and Cercospora rodmanii Conway) in a random block factorial arrangement with four replications per treatment, and four frames were designated as control (no-treatment) plots. All plots were weighed at 2-week intervals throughout the growing season, flowering stalks were counted, and plant heights were measured at each weighing date. Observations were also made on insect and pathogen populations on the plots during the season. Preliminary indications are that significant reductions in the growth rate or total accumulation of waterhyacinth mass in the test plots were not achieved by any of the treatment combinations during the first season's tests, but the potential for some of the treatments to effect the desired control began to emerge during the second year.
Author: Eugene E. Addor Publisher: ISBN: Category : Aquatic plants Languages : en Pages : 68
Book Description
During the 1975 growing season a field experiment was begun on Lake Concordia, La., to test the potential effectiveness of selected organisms as control agents against waterhyacinths, Eichhornia crassipes (Mart.) Solms. Floating frames, each approximately 2 m square, were anchored on the lake in open water and planted with locally growing waterhyacinths. Sixty of these frames (plots) were selected for treatment with various combinations of two insects (Arzama densa Walker and Neochetina eichhorniae Warner) and two fungi (Acremonium zonatum (Sawada) Gams and Cercospora rodmanii Conway) in a random block factorial arrangement with four replications per treatment, and four frames were designated as control (no-treatment) plots. All plots were weighed at 2-week intervals throughout the growing season, flowering stalks were counted, and plant heights were measured at each weighing date. Observations were also made on insect and pathogen populations on the plots during the season. Preliminary indications are that significant reductions in the growth rate or total accumulation of waterhyacinth mass in the test plots were not achieved by any of the treatment combinations during the first season's tests, but the potential for some of the treatments to effect the desired control began to emerge during the second year.
Author: Brij Gopal Publisher: Elsevier Publishing Company ISBN: Category : Nature Languages : en Pages : 492
Book Description
It is almost impossible for an individual to keep pace with the huge bulk of, not always readily accessible, literature on waterhyacinth which has amassed in recent years. This book provides for the first time a comprehensive bibliography of over 2700 references and a critical review of the current knowledge on all aspects of the plant. Important data on all these aspects have been compiled and presented in numerous tables and figures making the book the most important reference work to date on waterhyacinth. Areas requiring the extra attention of researchers are also indicated. In recent years aquatic weeds such as waterhyacinth have received great attention, not only for the magnitude of problems caused by them in the management of water resources, but also for the promise they hold as a new resource for such diverse uses as animal feed, compost, paper, energy (biogas) and above all the control of water pollution (wastewater treatment). Waterhyacinth outclasses all other aquatic weeds in its rate of growth, multiplication and dry matter production, and its potential ability in respect to energy and pollution control.
Author: Eugene E. Addor
Author: Eugene E. Addor
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Author: Indian Botanical Society
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Author: Brij Gopal