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Pheromone Traps 2017

The above pheromones traps varied widely in size. The effect of trap size on trap catch has been studied with mixed results. Larger traps often, but not always, capture more male pheromones than smaller traps.

Pheromones in humans play a different role.15Alpha1.jpg

Clearly, factors other than trap size are important in influencing trap catch, although when other factors were equal, larger traps have usually caught more moths (various species) than smaller ones. With sticky traps, this effect is at least partially the result of the increased adhesive surface area, that is, there is more space for trapping moths before the trap becomes saturated with them. Learn about do pheromones in humans exist?

With the gypsy moth, the benefit of larger pheromone trap size has been noted with three sizes of Sec- tar traps (3-M Company)" and two sizes of cylinder traps." Also, Bednyi and Ko- valev reported that an 8x increase in the surface area of their "paper strip" trap resulted in a 2X increase in gypsy moth male catch.

The aforementioned traps all used adhesive to capture the moths; thus, the question whether this effect will hold for dichlorvos-charged traps remains unanswered. In work with other species of moths involving pheromone trapping, sometimes larger traps are favored, sometimes smaller traps are favored,'"-'" and sometimes size appears to have no effect.

Embody found that a 1.9 1 "ice cream carton" sticky trap caught far fewer moths than the 9.6 I Gerberg trap'" when the two traps were placed in similar populations of gypsy moths. However, because of trap design differences, a conclusion that the results were due to size alone could not be made.

Optimum color for a gypsy moth trap is related to the vision of the male gypsy moth, a subject much discussed but little studied. Several authors 5'5"'5 have discussed the color vision of the male gypsy moth (males in one test seemed to prefer red, blue, or black over lighter colors, and it has been suggested that males may orient to dark silhouettes outlined against an UV background the sky). There have been two studies on the effect of trap color on male pheromone trap.

Granett evaluated yellow, brown, green, and white and found no significant effect on trap catch. Holbrook and Beroza" evaluated grey, red, yellow, yellow-orange, orange, white, and green traps, and concluded that trap color was of little importance. Currently, gypsy moth traps tend to be bright orange (to facilitate location) or green (to blend into the background, reducing vandalism). However, as pointed out by Carde, the above tests were strictly empirical, and the pheromone subject has not been approached systematically.

Resources: http://get-a-wingman.com/how-women-feel-guys-out-the-secret-to-attraction/
https://blogs.botw.org

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