THE IMPACT OF SYNTHETIC CHEMICAL PYRETHROID DELTAMETHRIN AND CYPERMETHRIN AND NATURAL BIOCHEMICAL NEEM OIL ON PHYSICO CHEMICAL PARAMETER OF FRESH WATER AND GROWTH OF FISH SEED IN NURSERY PONDSumana Shrimali and Abhimanyu Singh RathoreAbstract Indian Major Carps can be breed in the rainy season this time duration insects are also developed and increase in number in fish ponds. Insects are competing with fish food and predators on fish spawn and fry in fish nurseries. Mostly chemical based insecticide used for the eradication of insects in fish nurseries but they give deleterious effects on the environment. This study was done to checkout that effects of plant based insecticide on non-target organisms of fish nursery ponds and effects of Synthetic Chemical Pyrethroid Deltamethrin and Cypermethrin and Natural Biochemical Neem Oil on Physico Chemical Parameter of Fresh Water and Growth of Fish Seed in Nursery Pond. Bioassay of a natural insecticide Neem oil and synthetic Pyrethroid Deltamethrin and Cypermethrin were separately done on fresh water ponds of fish nurseries. To assess the comparative efficiency effects of Deltamethrin, Cypermethrin and Neem Oil of insect control an experiment was conducted in 4 cemented nurseries for 20 days. The insect effective dose of 0.00003 ppm deltamethrin, 0.00002 ppm cypermethrin and 0.004 ppm neem oil were used for the present study. Growth and survival of fish seeds were estimated after a culture period of 20 days and monitoring effects on phyto and zooplankton those found in water of nursery pond and Physico â chemical parameters of each set of experimental water was monitored at intervals of 5 days. This study brings the reader up to deal with comparison of Neem oil and Deltamethrin and Cypermethrin as insecticide on the Physico Chemical properties of Fresh Water and Growth of Fish Seed in Nursery Pond and provide a detailed overview of present thinking into the mode of action and effects of Neem oil as a eco- friendly insecticide in fish nurseries. |