Effects of Ricinus communis,Brassica nigra and mineral oil Kemesol on some biochemical aspects of larvae stage of Spodoptera littoralis (Boisd) (Lepidoptera: Noctuidae).

The third instars larvae of spodotera littoralis were topically treated with two plant oils,ricinus communis and brassica nigra and one mineral oil,kemesol 95% dissolved in petroleum ether and acetone at concentrations of 0.8,1.6,2.0,3.0 & 4 %. the results revealed that the mean values of the total haemolymph and fat body protein was reduced in larvae treated with b. nigra and kemesol 95%. a significant decrease was observed in haemolymph and fat body protein contents in larvae treated with all tested compound,the remarked decrease was noticed at the highest dose (4%) in both two solvents.