Bumble Flower Beetle
- Fruit trees (injured or over-ripe fruit)
Bumble flower beetle (BFB; Euphoria inda) is a common member of the scarab beetle family. Adults are 0.5-0.6 inches in length and 0.3-0.4 inches wide. They have yellowish-brown or cinnamon-colored outer wings with irregular rows of small black spots. The head, thorax, and underside of the body are densely hairy. When captured, adults may emit a defensive chemical with a pungent chlorine-like odor.
Larvae are white grubs and resemble June beetle grubs. Because they feed on soil or compost organic matter, they are beneficial in many situations.
Economic damage caused by adults feeding on plant parts is rare in Utah, and they seldom require control.
Adults lay eggs in the soil with high organic matter, or in compost during the first warm days of spring. As larvae develop, they feed on organic matter and rotting fruits and vegetables. They mature in June to July, and pupate at a depth of 2 to 5 inches. Adults emerge and become active between mid-August through the end of September, and then they seek a place to overwinter. There is only one generation per year.
BFB grubs feed exclusively on soil organic matter, and do not cause plant damage. On rare occasions, adults may feed on certain plant parts, including the following:
- Corn kernels during the silk stage
- Injured fruits or vegetables
- Ripe or overly ripe fruits
- Flower parts including stamens
If bumble flower beetles are damaging corn or fruit, use the following cultural/physical control methods:
- Remove decaying organic matter from the vicinity of the affected crop (compost piles, etc.).
- Harvest fruits and vegetables in a timely manner, and remove damaged produce throughout the season.
- Manually remove adult beetles from affected plants and place in a bucket with soapy water.