Lures Attractive to the Apple Maggot1

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Abstract
A number of ammonia-producing substances were tested for their attractiveness to the apple maggot, Rhago-letis pomonella. Among the results it was found that 1% glyeme in soln. of NaOH became more attractive to the flies as it became older. Addition of soap to all chemicals used increased the efficiency of traps to a marked degree. Household ammonia, (NH4)2SO4 and ammonium acetate in 1% solns. were all superior to fresh glycine.

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