Field Trial of Cue-Lure + Naled on Saturated Fiberboard Blocks for Control of the Melon Fly by the Male-Annihilation Technique13

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Abstract
A solution of 5% naled (wt/wt) in cue-lure, soaked on 2×2×½-inch fiberboard blocks at a rate of about 1 ounce per block reduced populations of male Dacus cucurbitae Coquillett more than 99%, based on trap catches in a 2-square-mile plot in Hawaii when the blocks were suspended 2 to 5 feet above ground in a grid pattern with 0.9 blocks per acre. In a small 5-acre area of the plot with a more favorable habitat, supplementary distribution of blocks at the rate of 5.4 per acre was necessary. The blocks maintained their effectiveness undiminished for over 7 months in the field despite heavy rainfall.

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