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trap patterns

Graphic depicting several trap-placement designs, with traps indicated by blue circles. Top left shows a grid pattern, with ten rows of circles spaced apart equally both horizontally and vertically. Top right shows a grid pattern with five rows of circles close together in rows but rows spaced further apart. Second row left shows traps in three spoke patterns. Second row right shows similar spoke patterns with an empty center in each. Remaining charts show variations on a pattern each with traps placed in horizontal parallel lines at left, vertical parallel lines in the middle, and horizontal parallel lines at right. Third row left shows this pattern with two lines in each zone, third row right five lines, bottom row left seven lines, and bottom row right four lines. Each chart shows distances on the axes, 0 to 8,850 meters on the X-axis and 0 to 4,023 meters on the Y-axis.

A study of pest-insect trap-layout designs using the TrapGrid computer simulation, compared traditional grid patterns (A and B) with several alternate designs: four crossed lines (C), eight spokes with an untrapped hub (D), two parallel lines (E), four parallel lines (not pictured), five parallel lines (F), six parallel lines (G), and four parallel lines in a modified alignment (H). All designs used 250 traps, indicated by blue diamonds. Establishment positions of pests are indicated with red circles. (Image originally published in Caton et al 2023, Journal of Economic Entomology)

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