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Gardening: Boxelder and red-shouldered bugs abound this year

Ray Ridlen writes about horticultural and gardening topics.
BY Ray Ridlen Published: October 29, 2012

It is looking like this is shaping up to be a boxelder and red-shouldered bug year. We have been receiving numerous calls at the office concerning these insects. This might be the biggest population of these insects since 1995. Here is information concerning these pests that will try to invade homes as they look for places to overwinter as the temperatures drop:

Host: The boxelder bug is found mostly on female (seed-bearing) boxelder trees. The red-shouldered bug prefers chinaberry and golden rain tree. Both are occasionally found on ash, maple, and some fruit trees.

Symptoms: These bugs do very little damage to their host plants even when they are present in large numbers. They are primarily nuisance pests when they begin to seek overwintering quarters in the late summer and fall. At this time they may be found in large numbers around homes, on shrubs and trees, and in lawns. They commonly attempt to enter homes and other buildings for protection. Problems may also occur on warm days during the winter and when they leave their overwintering quarters in the spring. They do not cause damage in the home by feeding but may stain fabrics or walls if they are crushed.

Life cycle: Adults of both species overwinter in protected places. They emerge in the spring when buds of their host trees open and fly back to their host plants, where they lay their eggs, usually in late April to early May. Both bugs prefer to feed on fruiting structures, including seeds that have matured and fallen to the ground, but will also feed on leaves. The first generation bugs mature and repeat the cycle. There are two generations per year.

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