Effects of nitrogen; sulpher and phosphorus containing fertilizers and organophosphorous insecticide on reproduction of biomphalaria alexandrina snails

ABSTRACT

The effect of the commonly used fertilizers [urea, ammonium nitrate, ammonium sulfate, sodium dihydrogen phosphate and the organophosphorous insecticide [DDVP]] on egg-laying of snails, hatchability of snail's eggs and growth rate of the newly hatched snails, was investigated. The present study revealed that all the selected compounds affected the egg-laying of the snails and their effects are different from one compound to the other. Nitrogen containing fertilizers have more effects than phosphorous or sulfur containing fertilizers. Also, DDVP has the greater effect on both egg-laying and growth rate of the newly hatched snails