Pheromone traps are incredibly powerful. The extensive areas involved, and their inaccessibility, necessitates the use of aircraft, and traps large enough to capture sufficient insects are relatively bulky and would involve the inefficient use of aircraft space. Thus far no tests have been made of the feasibility of using traps in population regulation of the spruce budworm, interest has moved more in the direction of mating disruption which lends itself more readily to aerial application over large areas than do pheromone traps. Learn about chikara pheromone cologne | http://pheromones-planet.com
Preliminary tests indicate that the sex attractant pheromones and the acetate inhibitor do reduce mating success when disseminated in the atmosphere. In laboratory experiments, newly emerged, unmated male and female budworm were placed in a wind tunnel, measuring 0.6 x 0.6 x 1.8 m long, with a wind speed of about 15-18 m/min. Six- teen pieces of filter paper were suspended on threads in a 4 x 4 grid in the upwind opening of the tunnel. Check out human pheromones at http://sundowndivers.org/?p=82
The Power of Pheromones
The treatment consisted of one mg quantities of chemicals placed on the filter paper. The insects were left overnight and collected the following morning when each female was dissected to determine if a spermatophore was present, which was taken as an indication of mating. Controls, in which no chemical was used, were alternated with the treatment. Four controls gave the percent of females mating as 62, 53, 51 and 68% an average of 58%. Four interspersed treatments with the aldehyde gave 19, 33, 42 and 59% for an average of 38% or a reduction of 34% in number of pheromone matings.
A single test of the pheromone inhibitor gave 50% mating with a subsequent control of 75%, a 33% reduction. There is therefore an indication that the presence of these chemicals does disrupt mating. Preliminary ﬁeld trials were conducted in two 2.5 m cube screen cages located about 200 m apart in woodland near Sault Ste. Marie, Ontario in July and August 1972.
Around each cage, equally spaced in a circle of radius five in, eight stakes were driven into the ground from which were hung open-ended containers housing a small polyethylene dish containing chemical. The containers were hung at heights of one and two In, making a total of 16 sources of chemical so placed that the cage would be permeated by the chemical, no matter the direction of the wind. Weight loss studies in the laboratory at 70 °F and a prevailing wind speed of about 15-18 m/min. indicated a very constant release-rate of the aldehyde at 1.2 mg per day per container. On each night of experimentation one cage was surrounded by chemical, the other cage was left untreated as a control. The following night the treatment was reversed. In this way it was hoped that variations in insect behavior due to the pheromones.
The location of the cages would be compensated for more pheromones. Numbers of insects placed in the cages depended upon their availability, and varied between 35 pairs and 100 pairs. The insects were placed in the cages near mid-day, left overnight and collected the following day around mid-day. The females were subsequently examined for spermatophores.