[6] The first Japanese beetle found in Canada was inadvertently brought by tourists to Yarmouth, Nova Scotia, by ferry from Maine in 1939.

As the larvae mature, they become c-shaped grubs, which consume progressively coarser roots and may do economic damage to pasture and turf at this time.

Model outputs can be used to support the timely implementation of monitoring and control actions against the pest, thus reducing its potential impact.

These comprise a pair of crossed walls with a bag or plastic container underneath and are baited with floral scent, pheromone, or both.

Standard applications (low density across a broad area) take from two to four years to establish maximal protection against larval survival, expanding through the soil through repeated rounds of infection.

[4] On field crops such as squash, floating row covers can be used to exclude the beetles, but this may necessitate hand pollination of the flowers.

[4][20] Traps are most effective when spread out over an entire community and downwind and at the borders (i.e., as far away as possible, particularly upwind) of managed property containing plants being protected.

Istocheta aldrichi instead seeks out adult female beetles and lays eggs on their thoraxes, allowing its larvae to burrow into the insect's body and kill it in this manner.

A female I. aldrichi can lay up to 100 eggs over two weeks, and the rapidity with which its larvae kill their hosts allows the use of these flies to suppress beetle populations before they can themselves reproduce.

[4][22][23] Soil-dwelling nematodes are known to seek out and prey on Japanese beetle grubs during the subterranean portion of their life cycle by entering larvae and reproducing within their bodies.

[4] Recent studies have begun to explore a microsporidian pathogen, Ovavesicula popilliae, as a form of biocontrol against Japanese beetles.

[24] While the larvae of Japanese beetles feed on the roots of many genera of grasses, the adults consume the leaves of a much wider range of hosts, including these common crops:[7] bean, cannabis, strawberry, tomato, pepper, grape, hop, rose, cherry, plum, pear, peach, raspberry, blackberry, corn, pea, okra, and blueberry.