Abstract
Applications of ultra-low-volume (undiluted) technical Inalathion at 8, 12, and 16 fluid oz per acre (about 10, 15, and 20 actual oz per acre) from a J-3 Piper Cub flying 15 feet above the cotton in 75-foot swaths were as effective against the boll weevil, Anthonomus grandis Boheman, as the standard application of mcthyl parathion (0.4 lb per acre in 2 gallons of water applied in 37.5-fool, swaths from a plane flying in the conventional manner directly above the cotton). Populations of bollworms, Heliothis zea (Boddie), were not sufficiently large to allow evaluation of the control achieved by the 4 treatments, numbers of boll wcevils found in surface woods trash in the fall and spring ncar treated ftelds were reduced considerably by fall applications of technical malathion, compared with areas that received no late treatment. The populations of overwintered weevils found in cotton planted in 1965 in the area treated in the fall of 1964 were also considerably reduced over that found in an area that had received no treatlnent.
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