RESIDUAL ACTIVITY STUDY OF CERTAIN GROUND SPRAYING EQUIPMENT FOR CONTROLLING BEAN APHIDS WITH PRIMICARB INSECTICIDE ON Vicia fabae (L.) PLANTS IN EGYPT

Field experiments were carried out in an area of about 2 feddan planted with bean plants variety (sakha 2 ) vicia faba (l).during season 2014 in 12th december at sakha ,kafr elsheikh governorate. the selected area was split into 7 plots including control plot. primicarb was sprayed with the rate of recommended and 3/4 recomended dose rate and one treatment left without spraying as control by using hydraulic knapsack sprayer (solo) (22 l./fed.), economy micron ulva sprayer (15 l/fed.) and conventional motor sprayer (wisconson) (400 l/fed.) data indicated that, all tested doses revealed significant negative influenced on aphis fabae survival. the most effective is total recommended dose followed by 3/4 recommended dose. it could be recommended to use these compound with lv spraying equipment with not less than (15l/fed.).the data showed that hydraulic knapsack sprayer (solo) was the pest equipment to control aphis fabae on bean plants. the rate of performance of solo sprayer was 10 fed./day. it was the best equipment, but the lowest rate of performance was wisconson motor sprayer since it could spray only 2.5 fed./day.