University of Illinois Extension

University of Illinois Extension

Hort Answers

Insect Damage

Picnic Beetles

2 (1 = rare 5 = annual)
4 (1 = very little damage 5 = plants killed)
Apples, strawberries, raspberries, watermelons, muskmelons, corn, tomatoes

Plants Affected

The sap beetles fly to ripening or damaged apples, strawberries, raspberries, watermelons, muskmelons, corn, tomatoes, etc. The beetles bore into the fruit and makes it unfit for human consumption. The picnic beetle tends to attack damaged and overripe or decomposing plant tissues. It attacks undamaged ear corn silks and ripe fruits. They tend to congregate in areas where fruit and vegetable materials are present.

Life Cycle
At this time, very little is known about the picnic beetle life cycle.

Harvest the fruits as soon as they ripen, and remove any damaged or overripe fruits & vegetables from field or garden. Use of traps/baits with scents of overripe fruits, and discard the traps as soon as they are filled with the picnic beetles. Spray with insecticides (recommended in your state) but observe the pre-harvest interval.

Related Resources
Home, Yard & Garden Pest Guide
Illinois Commercial Landscape and Turfgrass Pest Management Handbook
U of IL - Distance Diagnosis through Digital Imaging
U of IL - Plant Clinic