LaboratOl)' experiments were carried out to evaluate the bioactivity of certain
traditional insecticides (i.e. profenofo$, chlorpyrifos-methyl. monocrotophos and
carbosuifan) against certain sucklng pests. The tested alternativE' were also
evaluated when combined in mixtures with conventional insecticides at1: 10 ratio
based on the LC~'s and LC~'s value Profenofos showed the highest toxicity against
adults of whiteny, B. labacl (Genn.) and two-sponed spider mite, T. urticae (Kochl)
(LC~'s 52 & 8 ppm and L~ 150 & 25 respectively). wherever carbosulfan showed
the highest toxicity against aphids (LC~ 75 ppm and LC~ 160 ppm).
Chloropyrifos-methyl showed moderate toxicity against aphids and mites
wherever monocrotofos showed the least. For the joint action pesticides/alternatives
at 1: 10 • the tested mineral oil Kz. and vegetative oil (black cumin) improved the
toxicity of all tested pesticides against aphids and mites. It was obvious that non of
the tested altematives (i.e. mineral oil Kz. natural oil black cumin or liquid detergents)
showed synergistic action to profenofos, monocrotophos. and carbosulfan against
adults of Bemisia labaci (Genn.). meanwhile. chlorpyrifos-methyl mixtures with Kz oil
and vegetative oil black cumin induced a high increase in toxicity 87.6% and 86.5%.
also the mixtures of chlorpyrtfos-methyl with nastabon increase the toxicity with 28%
and 7.96% for LC~ and L~ values, respectively.