Abstract
A ground sprayer that uses the principle of the air blast to deliver ultra low volume (ULV) applications of pesticides minimized drift and increased the amount of material deposited on the target area. The 8-row sprayer consists of 8 boom-mounted external atomizers (1 per row) that spray finely atomized material into air blasts of about 85 mph that are directed into the plants. The rapidly moving air replaces the carrier water used in a conventional water-oil emulsion sprayer. ULV applications of Azodrin® (3-hydroxr- N -methyl- cis -crotonamide dimethyl phosphate), technical grade Bay 41831 ( O, O -dimethyl 0-4.nitro- m -tolyl phosphorothioate), and toxaphene + DDT were compared with conventional spray applications of toxaphene + DDT and Azodrin against various cotton pests. Results against the boll weevil, Anthonomus grandis Boheman; the bollworm, Heliothis zea (Boddie) ; and the carmine spider mite, Tetranychus cinnabarinus (Boisduval), obtained with materials applied with the new ULV sprayer were at least as good as those obtained when the insecticides were applied with the conventional sprayer.
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