Attractants

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Attractants

 

natural or synthetic substances that attract animals. Insects are especially sensitive to attractants. Three basic types of attractants are known: sexual attractants, which attract the way that members of the opposite sex do; food attractants, which attract the way food does; and attractants which attract like a substratum for egg-laying. The sexual attractants are the best known. It has been established that substances extracted from the females of some insect species in a concentration of 1 x 10-14 mg per liter of air attract males of the same species, and sometimes those of other genetically close species. Cases have been observed in which butterflies are attracted from a distance of 3 to 9 km. The presence of attractants has been established in more than 300 insect species. For some of them the attractants have been extracted and their structures have been studied—for example, the attractant of the gypsy moth gyp-tol (formula 1).

In order to attract the gypsy moth, the synthetic product gyplur (formula 2) can also be used. It is a homologue of gyptol and trimedlur (tributyl ester 4- [or 5-] chlor-2- methyl-cyclohexane carbonic acid [formula 3]) from the eastern fruitfly.

Attractants are of practical use in fighting plant pests and animal parasites. Using the attractants as bait, one can exterminate the insects with a minimal waste of insecticides; it is also possible to disorient the males and thus reduce the numerical size of the following generations. Attractants are also used for determining which harmful insects have infected a crop.

REFERENCES

Korotkova, O. A. “Privlekaiushchie veshchestva (atraktanty).” Zhurnal Vsesoiuznogo khimicheskogo obshchestva im. D. I. Mendeleeva, 1964, vol. 9, no.5.
Lebedeva, K. V. “Privlekaiushchie veshchestva (atraktanty).” Zhurnal Vsesoiuznogo khimicheskogo obshchestva im. D. I. Mendeleeva, 1968, vol. 13, no.3.
Jacobson, M. Insect Sex Attractants. New York and others, 1965.
Advances in Pest Control Research, vol. 3. Edited by R. L. Metcalf. New York-London, 1960.

N. N. MEL ’NIKOV

References in periodicals archive ?
Had an attractant been present, worms would have slowed in movement and increased reversal behavior in the stimulus off phase of the cycle increasing the reversal/movement ratio during this phase as they sample their immediate vicinity for detectable volatiles.
INSECT-O-CUTOR, the leading British Manufacturer of Flykillers, have developed a new green "Synergetic" Attraction Lamp and Independent tests on electricity killers carried out by a Cambridge University entomologist have also proven that Synergetic ultra-violet Ultra Violet green light insect attractant lamps are a more powerful lure than conventional Ultra Violet University of Cambridge Department of Medical Entomology, and David Hutcheson of Insect-o-cutor (Peter Cox Group), summarizes the tests which were carried out during March and April 1994 in controlled conditions at the Insect-o-cutor Entomological Laboratory, Stockport, using Cambridge-bred house-flies (Musca domestica).
Alternative methods of combating the med fly are available including the use of chemical and biological attractants, sterilisation of male flies and mass trapping.
He wants hot does, the best attractant there is, to pass unknowingly by his stand.
99) line of spray lure attractants you will be able to draw game in from longer distances than ever before.
But what we now have is only a late-season attractant, and because that doesn't help growers as much as we would like, we still have work to do," Khrimian says.
where y is the normalized antennal response, x is the dose of the attractant in mL, and a and b are empirical coefficients representing maximal EAG response and receptor binding affinity, respectively (Table 1).
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Ruck'N Buck[R] is a powerful new attractant designed for use during the pre-rut and rut.
Only half the size of a pencil eraser, the tiny Mediterranean fruit fly--or medfly--impels hundreds of state and federal agents annually to deploy some 150,000 traps baited with the male medfly attractant trimedlure.
In 1968, ARS scientists discovered that lactic acid, which emanates from human skin, acts as an attractant.
Down Wind Scents' Inferno attractant uses natural deer essence combined with modern technology to create an alluring 100-percent natural blend of urine from does in estrus.