[Studies on extensive application of bromoacetamide in various types of schistosomiasis endemic area]

To provide scientific basis for the popularization and application of molluscide bromoacetamide.

Large scale application of bromoacetamide in twenty eight counties of four provinces was investigated and its molluscicidal effect in marshland and influence on marshland grass (Cyperus) and fishes were observed.

High molluscicidal effect of bromoacetamide was found against both snails and snail eggs in various environments. According to the results observed in different fields, the applicable dosage of bromoacetamide is 1.5-2 g/m2 for spraying method, 1.5-2 g/m3 for immersing method and 1.5-2 g/m for immersing in combination with shovelling the turf along the bank. When it was applied in fish-raising ponds or rivers at an applicable dosage, no toxic effect on fishes was found. The spraying dosage of bromoacetamide did not affect the rice seedling but it did some damage to the leaf-tips of marshland grass, however, the grass did turn green and grow.

Bromoacetamide has proved to be a safe and effective mulluscicde against Oncomelania under various field conditions.