Effect of malathion and dimethoate on some biological parameters of laying hens

Pesticdes are indispensable for modern farming but a number of them have harmful effects on other non target organisms. The results of the present study revealed that malathion feeding to laying hens at levels of 200 ppm had no effect on food consumption, body weight egg production and egg weight. However liver and kidney of slaughtered hens increased in weight as a result of 500 ppm feeding level. On the other hand, dimethoate at 25 and 60 ppm feeding levels resulted in a pronounced decrease in food consumption, body weight and egg production. At level of 60 ppm feeding, liver and kidney increased in weight