pheromones


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pheromones,

any of a variety of substances, secreted by many animal species, that alter the behavior of individuals of the same species. Sex attractant pheromones, secreted by a male or female to attract the opposite sex, are widespread among insects. The pheromones produced by males include a substance produced by cockroaches that attracts females and orients them in the correct mating positions and a substance elaborated by the desert locust that accelerates sexual maturation in adults of both sexes. Male-attracting pheromones have been discovered in the females of many species of beetles, bees, and moths. The polyphemus moth will not mate unless red oak leaves are present; it has been found that the leaves give off a volatile aldehyde that stimulates the female to release a male-attracting pheromone. Attempts are being made to use pheromones in insect control, e.g., as bait to attract males to field traps or, in very high concentrations, to disorient insects and prevent mating.
References in periodicals archive ?
In addition, more studies will be needed to assess their utility in monitoring tortricids in orchards treated with their respective sex pheromones.
Therefore, as opposed to employing insecticides in the soil to control larvae, we suggest an alternate method targeting adults based on an understanding of the fly's courtship and mating behaviors and related sex pheromones.
In 2008, University of California-Riverside researchers figured out the chemical structure of the bug's aggregation pheromone and named it "murgantiol.
That these flight pheromones may even contaminate line, lures or indeed one's hands while catching fish, is thought by some to be possible, warning those un-caught fish of impending danger.
For many animals, pheromones are mixtures of molecules, or bouquets, acting in synergy when combined in particular proportions (Wyatt, 2003, 2014).
Total quantity or scope: Typographus Ips beetles specific pheromones - Item 8924
Farmers first began using pheromones with coddling moths in apple and peach orchards in Washington and pomegranate trees in California.
To date, information about the use of nanofibers as vehicles for dispersing insect pheromones are scarce and largely based on the results obtained by Hellmann et al.
In lab tests exposing cabbage moths to the equivalent of LED street lighting, females produced on average only about one- to two-thirds the amounts of their usual seductive pheromone, says ecologist Roy van Grunsven of Wageningen University in the Netherlands.
In terms of revenue, global IPM pheromones market was valued at USD 1,685.
However, the team was again frustrated when the new pheromone failed to attract the insects when it was tested in bug-infested apartments.
Stereochemical studies of pheromones are therefore beyond the scope of conventional methods of stereochemical assignment, such as degradation to a simple compound of known absolute configuration or X-ray crystallographic analysis.