Evaluation of Certain Ground Spraying Equipment by the Mean of Qualitative Distrubtion of Certain Insecticides Deposits and Artificial Targets on the Cotton Leaf Worm on Cotton Plants

Abstract

hree alternative products include BioAgent (Spinosad), OP (Profenofos) and IGR (Pyriproxyfen) were sprayed by using Knapsack motor sprayer Agromondo (20 L./Fed.) and Hand held compression sprayer Kwazar (94 L./Fed.) on cotton field highly infested with cotton leaf worm larvae. A satisfactory coverage was obtained on cotton plants and spray receptors. The spectrum of droplets ranging between 103-191 microns (VMD). With sufficient number ranging from 80-225 n/cm². The productivity of motor sprayer Agromondo was 12 Fed./day. It was the best equipment, but the lowest productivity was Kwazar sprayer since it could spray only 5 Fed./day. Results indicated that Profenofos and Pyriproxyfen is more effective in controlling larvae of cotton leaf worm on cotton plants followed by, Spinosad, with Knapsack motor sprayer (20 L./Fed.) followed by Kwazar sprayer (94 L./Fed.). Data showed that, low volume spraying may be recommended because of reducing the time lost in the process filling the machines of reducing the time lost of the spray solution on the plant leaves and saving the lost spray on the ground. Also there was no significant difference between recommended dose rate and ¾ recommended does with using low volume spraying.