Distribution of Released Japanese Beetles in a Grid of Traps13

Publisher Website
Google Scholar
Abstract
Traps for Japanese beetles, Popillia japonica Newman, were set out in a pattern of 7 concentric annuli with the traps 30 feet apart. The area (139,000 square feet) had a diameter of 420 feet. When beetles were released at the center and at varying distances from the outer annulus the captures ranged between 0.1 and 13.9%; the average capture of beetles released at the center was 5.9%. The longest distance traveled by a single beetle was 1390 of a measurable distance of 1420 feet. In the turf area the beetles had a negative binomial distribution. In an abandoned peach orchard, adjoining the turf area, they tended to congregate (7-10 times more beetles) in traps near rose, peach, and wild cherry plants when these plants were within 10 feet of the traps. Since the distribution of beetles in the natural population and beetles released at the center of the annuli were not similar, the size of the natural population could not be estimated.

This publication has 4 references indexed in Scilit: