Abstract:
Injection of 10 ul of (1 % aqueous solution) isopropoxy oxide per 5th instar male nymph of Locusta migratoria proved an effective dose for the histopathological studies. Toxicity induced by the sterilant, during two weeks, varied according to the size and age of the nymph of Locusta and Schistocerca. The LD 50, after two weeks, was estimated to be about 15 ul for the Locusta nymphs while for the Schistocerca nymphs the results are insufficient for a firm conclusion. The toxic symptoms and behaviour of the chemosterilant treated locusts were similar to those which are known to follow irradiation. The treated nymphs consumed food for a number of days, assumed yellow colouration at sexual maturation and showed readiness to copulate as long as they had some vigour. A few metamorphic defects occurred mostly during the moulting, and wing pads appeared to be the most sensitive area. Some of the marked histopathological changes in the spermatids of Locusta were the pycnotic degenerative nuclei, clumping of the chromosomes and the vacuolation in the cytoplasm, nucleoplasm and the mitochondrial nebenkem.
Page(s):
362-365
DOI:
DOI not available
Published:
Journal: Pakistan Journal of Scientific and Industrial Research, Volume: 20, Issue: 6, Year: 1977