Electroantennogram responses of synthetic periplanone-A and periplanone-B in the american cockroach
The electroantennogram responses of synthetic (−)-periplanone-B (PB) and (−)-periplanone-A (PA) were evaluated by using the antennae of the unmated male American cockroachPeriplaneta americana L. The threshold concentrations of the pheromone activities for the two chemicals were similar. Neither a synergistic nor an inhibitory response was noted, and only an additive effect was detected when PA and PB were applied as a mixture.
Attraction responses of the American cockroach to synthetic periplanone-B
Synthetic periplanone-B has been shown not only to be a sex excitant to malePeriplaneta americana by bioassay in the laboratory but also an attractant pheromone by field tests in a rice storage house in Taipei. During both summer and winter months, it attracted signincantly more adult males into the traps used in the experiments than adult females. There is a statistically significant increase in the sex ratio (male-female) of the trapped adults with increase in periplanone-B used. An attempt has been made to explain the trapping of females and nymphs in addition to males by the chemicals used in our tests.
BEHAVIOUR OF MALE SUMMERFRUIT TORTRIX MOTHS, ADOXOPHYES ORANA (LEPIDOPTERA: TORTRICIDAE), TO SYNTHETIC AND NATURAL FEMALE SEX PHEROMONE
Male Adoxophyes orana (Fischer von Röslerstamm) not only respond behaviourally to the synthetic female sex pheromone (9: 1 cis‐9‐: cis‐11‐tetradecen‐1‐ol acetate), but also to its separate components when applied in an air stream. Males are not maximally responsive until at least 4 days after emergence. Responsiveness increases during the dark period being maximum during the last third of the night. Larger pheromone quantities are required to elicit the successively higher steps in the response chain: activation, wing fluttering, upwind walking.