Studies on the effectiveness of some bioinsecticides on aphids infesting potato and tomato plants (fam: solanaceae)‎

الملخص EN

Afield experiment was conducted of DirabNegm, district, sharkia governorate, Egypt, during 2019 growing season to evaluate the effect of four bioinsecticides namely propargite (skanmite, 73% EC), abamectin (spiner10% sc), thiamethoxam 15.24% + abamectin 3.23% (Agreflex 18.6% sc.

) and B.

T (protecto 9.4% wp) against the green peach aphid myzuspersicae (sulzer) attacking potato and tomato plants, using different doses.

Summarized results revealed that m Agroflex recorded annual or seasonal average effects expressed as highest reduction percentages on aphid in festation (74.67% ) followed by skanmite (73.65% ), protecto (73.51% ) and spiner (69.59% against aphid infesting potato plants, the same order of the effiviency of the tested bioinsecticides was noticed in tomato plants except aswitch in position between skanmite and protecto.