Small Fruit Insects
Brown Marmorated Stink Bug
Brown marmorated stink bug (BMSB) is an invasive insect pest from eastern Asia. In
Utah, it was first detected in 2012 in Salt Lake City. Its broad host range includes
fruit, vegetable, ornamental, and field crop plants; in Utah, it has primarily infested
ornamental deciduous trees and shrubs in urban and residential landscapes.
Bumble Flower Beetle
Bumble flower beetles are common throughout the growing season on flowers, oozing
sap, and other sweet, overripe, or fermenting matter. Bumble flower beetles seldom
warrant the use of chemicals for control.
The European earwig is an omnivore; it feeds on detritus, fungi, plants, and insects.
Earwigs can injure the buds, leaves, flowers, and fruits of a broad range of plants,
including fruits, vegetables, and ornamentals; they can be a nuisance pest by entering
Invasive Insect Look-alikes: Mistaken Identity
Pest identification is the cornerstone of integrated pest management, but is a skill
that can be difficult to master. Mistakes in identification are common, as many insects
look and act alike, and/or can cause similar injury.
Raspberry Crown Borer
The raspberry crown borer attacks raspberry plants in northern Utah, causing cane-wilt
and death. Crown borer has a 2-year life cycle; it spends much of it as a grub (larva)
tunneling in the lower cane, crown and roots of raspberry plants.
The raspberry horntail is a caneboring wasp that can cause crop loss to raspberries
in northern Utah. Apply insecticides in the spring targeting adults, to prevent egg-laying
in the new canes. Infested canes often become evident during summer when tips wilt
and die back.
Rose Stem Girdler
Rose stem girdler is a common cane-boring beetle of raspberry and blackberry in central
and northern Utah. Larval feeding in the cambium under the cane bark causes spiral
grooves and gall-like swellings; injured canes may wilt and break off.
Spider Mites in Raspberry
Spider mite feeding can cause 'mite burn' in raspberry plantings and is typically
first observed on the lower leaves. The twospotted spider mite is the most common
mite to attack raspberry in Utah. Populations can build quickly to high numbers during
hot, dry conditions.
Spotted Wing Drosophila
Spotted Wing Drosophila (SWD) is a new Utah pest (first found August, 2010) that can
infest un-ripened (pre-harvest), ripe, over-ripe, and spoiled fruits. SWD attacks
a broad range of fruits, including tree fruits, berry fruits, and vegetable fruits.
Western Flower Thrips
Western flower thrips (WFT) are a frequent pest of nectarine, and an occasional pest
of apple and other fruits in Utah. WFT can be abundant on numerous weed and crop hosts.
They cause damage by feeding on and laying eggs into fruit buds, flowers, and fruits;
a halo or “pansy spot” can form.