(E, Z)-2, 6-nonadien-1-al and (E)-2-nonen-1-al Present in Crushed Cucumbers are Natural Repellents for the American Cockroach (Periplaneta Americana)

The compounds (E, Z)-2,6-nonadien-l-al and (E)-2-nonen-l-al that are present in crushed cucumbers were found to repel 98% of American cockroaches, Periplaneta americana L., when present at concentrations of 50 ppm in a test chamber.