Sodium Borate Inhibits Decomposition of Two Protein Hydrolysates Attractive to the Mexican Fruit Fly123

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Abstract
Used at 1% in invaginated glass traps, an acid hydrolysate of corn protein with com-steep water, Staley’s Protein Insecticide Bait No. 7 (PIB 7), attractive to the Mexican fruit fly, Anastrepha ludens (Loew), putrefied And changed color. Fruit flies disintegrated in the solution and undesirable flies were attracted. Sodium borate (borax) at 2% eliminated putrefaction and resultant effects. Although catches of Mexican fruit flies were lowered by 10%, the advantages gained outweighed this reduction. Addition of borax to an enzymatic hydrolysate of cottonseed protein, a more effective lure than PIB 7, resulted in the same advantage but did not affect the catch.

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