The effect of the insecticide Methomyl and the ethanolic extract of comphor
leaves on egg production of poultry chickens Gal/us domesticus and its shell
characters was studied. Results showed that LD50 was 3.98 and 2.44 mg/kg b.w. for
Methomyl and comphor extract respectivly. When femals treated with '1~ LDso of both
compounds during (Two weeks) immature stage, results indicated that, the two tested
compounds delayed oviposition of the first egg. Weight of eggs laid by treated females
significantly decreased, while non significant changes were induced in the external
features of egg diameter and egg shell. The adverse effect of these treatments on
yolk and albumin parameters was obviously noticed in case of methomyl treatment in
comparison with camphor extract. In the same time levels of phosphorus, calcium and
magnesium in egg shell did not significantly affected with treatment of both
compounds, while albumin total protein and total lipid in yolk exhibited a rather
response to these treatments.