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Denver Lawn Care and the Japanese Beetle


Japanese beetles can be very damaging to Denver grass and plants.  At the stage when they are larvae, they feed on the roots of grasses. When patches are damaged by the larvae, the grass becomes more susceptible to water stresses or drought damage that can lead to death.

Once the larvae develops into a full grown beetle, the damage they produce is a lot more obvious. They feed on softer tissue plants such as leaves, flowers, and buds. Rose flowers are particularly susceptible. They have a one year life cycle and the adults usually emerge in early June. The female will feed on a host plant and then search for moist patches of grass to dig down a couple inches to lay eggs. Within her 4-8 week life span, they can lay 40-60 eggs. The rapid development of hatched larvae takes a large toll on the roots of grass and with the dryness of late summer, the damage is the most apparent.

With no known natural enemies, Japanese beetles can damage plants and grass fairly quickly. When these beetles begin to appear, it only attracts more beetles, so it’s important that you call your Denver tree care specialists at American Arbor Care as soon as you notice them.