New approaches: pheromones and related chemicals in some USDA insect control programs.
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Biomedical subjects
Publications and source records attributed to M Beroza.
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Methods currently in use in the extraction, isolation, and identification of insect sex attractants, which are needed for use in pest control, are described briefly. Because amounts of these materials in insects are generally minute, specialized microanalytical methods and techniques have been developed to aid in the determination of their chemical structures.
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The substitution of a 7-alkoxy group for the 6,7-epoxy moiety in aryl terpenoid ethers having high juvenile hormone activity has produced several compounds exceptionally active against Tenebrio molitor. The most potent compound [7-ethoxy-1-(p-ethylphenoxy)-3,7-dimethyl-2-octene, called JH-25] is active at the level of 10 picograms per insect, or about 100 times more active than other promising juvenile hormone mimics so far reported. Compound JH-25 was also active against Tribolium confusum.
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A sex pheromone isolated from the cuticle and feces of the female house fly attracts the male fly; it has been identified as (Z)-9-tricosene. Chemical and biological comparisons of the natural and synthesized compounds show that they are identical.
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