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  • 2010-2014
  • 1990-1994  (2)
  • 1993  (2)
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  • 2010-2014
  • 1990-1994  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    Orientation of bark beetlesPityogenes chalcographus andIps typographus to pheromonebaited puddle traps placed in grids: A new trap for control of scolytids (1993)
    Springer
    Journal of chemical ecology 19 (1993), S. 2297-2316 
    Details
    ISSN: 1573-1561
    Keywords: Semiochemical ; pheromone ; pest control ; insect trap ; Scolytidae ; Coleoptera ; mass trapping ; computer simulation ; disruption ; effective catch radius
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract A puddle trap was designed that is simple to build and efficient in catching bark beetles (Coleoptera: Scolytidae). The trap is insensitive to wind and should be much easier to manufacture than the more complicated perforated pipe and barrier traps commercially available. A 7 × 7 grid of 49 puddle traps baited with aggregation pheromone components ofPityogenes chalcographus (chalcogran and methyl decadienoate) was placed at either 1.5-, 3-, 6-, or 12-m spacing between traps in the field for two or more replicates of one day length (June 1989, Torsby, Sweden). The resulting catches showed that beetles were trapped as they flew into the grid since the inner square-ring of 24 traps caught less beetles per trap than the outer square-ring trap average (36 traps) in most experiments.Ips typographus also landed in puddle traps primarily on the periphery of the grid (6-m spacing only) when traps were baited with its pheromone components, (S)-cis-verbenol and methyl butenol. Computer simulation of flying bark beetles in grids of traps of various spacings and catch radii estimated that the experimental pheromone traps had an effective catch radius of 1.3 m or less forP. chalcographus, depending on the spacing between traps. An effective catch radius of 2 m forI. typographus was found for the 6-m grid spacing.P. chalcographus beetles were increasingly disrupted in their orientation to pheromone at the closer trap spacings since the effective catch radius declined linearly with closer trap spacing. However, landing was still precise since unbaited puddle traps within the grid did not catch any bark beetles.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00979665
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  • 2
    Electronic Resource
    Electronic Resource
    Simulation and equation models of insect population control by pheromone-baited traps (1993)
    Springer
    Journal of chemical ecology 19 (1993), S. 1939-1956 
    Details
    ISSN: 1573-1561
    Keywords: Semiochemical ; pheromone ; pest ; biological control ; insect trap ; personal computer program ; Scolytidae ; Coleoptera ; mass trapping
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract A spatial-temporal model for personal computers is developed that simulates trapping of an insect population based on trap and population parameters that can be varied independently. The model allows individual “insects” to move forward at any step size with right or left turns within any specified angle taken at random. Thex andy axes of the area within which insects move can be varied as well as the number of insects, their flight speed, and the duration of the control period. In addition, the number of pheromonebaited traps, their placement in a grid or at random (with a variable degree of spacing), and their effective catch radius (proportional to pheromone release rate) can also be varied. Simulations showed that catch was similar regardless of whether traps were placed in a grid or practically at random (random placement but no traps were allowed to overlap in their effective catch radii). Iterative equations were developed for computer that can rapidly obtain values that correspond to the mean results from the slower simulation model. Based on a set of input parameters, the equations determine the percentage of the population that should be caught during a specified time, the time required to catch a specified proportion of the insects, and the number of traps necessary to catch the population proportion in the time period. The effects of varying the number of insects, flight speed, trap radius, and number of traps on the percent control or time to catch all insects are presented. Population control of the bark beetleIps typographus was simulated using realistic pheromone trap and population parameters. A discussion of insect and bark beetle (Coleoptera: Scolytidae) population control using pheromone traps is presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00983798
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