APPLICATION OF OXADIARGYL SOLUTIONS FOR CONTROL OF DUCKWEED (LEMNA MINOR) IN FRESHWATER AQUACULTURE PONDS

Abstract

This work emphasize on to find out the effective dose ratio of Oxadiargyl solution for control of duckweed (Lemna minor) in intensive Indian Major Carp (IMC) culture pond and their impact on non target animals. Experimental results revealed that application of Oxadiargyl is very much effective for controlling Lemna minor. The optimum dose selected for the field trial is 450 mg /liter of water and it is not only effective in controlling 90% weed growth but also does not show any sign of harm to non target organisms. Moreover, it increases the dissolved oxygen content in water body. Pathological test of experimental fishes does not show any deviation of hematological parameter i.e. hemoglobin percentage of Labeo rohita is 2.9 gm and simultaneously it indicates the effectiveness of chemical potentialities of the weedicide. So Oxadiargyl is very much effective for duck weed control and it helps the fish farmers in cost effective way to solve weed growth problem. Hence, the farmers can achieve maximum production beyond their expectation. The production cost is minimizing due to minimum expenses for weed control and also income will be high due to much more production of fish. Therefore, weedicide application for controlling duck weed is less expensive than manual labour.