9788177540574 - Weedy Aquatic Plants: Their Utility, Menace and Management von Gupta, O. P. (2 Ergebnisse)

Zustand: New. pp. xii + 274 Figures, Illus.

Hardbound. Zustand: As New. Reprint. Contents I. Introduction 1. The need of aquatic plants. 2. Explosion of aquatic plants. 3. Menace of excessive aquatic plants. II. Propagation dispersal and kinds of aquatic plants 1. Propagation and dispersal. 2. Kinds of aquatic plants. III. Common aquatic plants 1. Algae. 2. Ferns. 3. Angiosperms. IV. Survey of problem aquatic plants in India 1. State wise aquatic weed problems. V. Aquatic plant management strategies 1. Identification and assessment of the problem. 2. Control selection. 3. Control implementation. 4. Long term management. 5. Ecological shifts. VI. Physical and utilisation control of excessive aquatic vegetation 1. Physical control. 2. Utilisation control. VII. Herbicidal control of excessive aquatic plants 1. Advantages and limitation of aquatic herbicides. 2. Precautions in the use of herbicides. 3. Common aquatic algicides and herbicides. 4. Localised control of aquatic weeds. 5. Drift control systems. 6. Methods of application of herbicides to waterbodies. 7. Calculating herbicide requirements. 8. Field experimentation with aquatic herbicides. VIII. Biological control of excessive aquatic plants 1. Arthropods. 2. Plant pathogens. 3. Herbivorous fish. 4. Manatee. 5. Other animals. 6. Competitive plants. IX. Aquatic plant management in pisciculture 1. Essentiality of aquatic plants in pisciculture. 2. Damage to pisciculture by overgrowth of plants. 3. Weed control options in fish ponds. 4. Renovation of degraded fish ponds. 5. Direct effects of herbicides on fish. 6. Vegetation management in swamps and marshes. X. Aquatic plant management in irrigation systems 1. Design control devices. 2. Physical control devices. 3. Biological control options. 4. Herbicidal control options. 5. Effect of herbicide residues in irrigation water on crops. 6. Management of ditchbank vegetation. 7. Management of weeds in drainage ditches. XI. Noxious aquatic plants and their control 1. Eichhornia crassipes. 2. Hydrilla verticillata. 3. Ipomoea carnea. 4. Nymphaea and Nelumbo spp. 5. Pistia stratiotes. 6. Potamogeton spp. 7. Salvinia molesta. 8. Typha spp. 9. Vallisneria spiralis. Appendices. Subject index. 273 pp.