Grape Beneficials

Search Results

  • Assassin bugs

    Adult assassin bugs are medium to large insects, and their color ranges from brown to green. They have long heads with a groove between the eyes and curved beaks. The nymphs are also important predators.

  • Braconids

    Braconids are small black, orange or yellow wasps that prey on larvae of grape berry moth and other insects. Adults are less than 10 mm long, and many species are found in vineyards and surrounding woods.

  • Damsel bugs

    Damsel bugs have long bodies that narrow slightly toward the head. They have stout beaks and large front legs for grasping prey.

  • Green lacewing

    Green lace-wing adults (10 to 12 mm) have net-veined wings and gold-colored eyes. They feed on nectar, pollen and aphid honeydew. Some lacewing species are brown and smaller. Lacewing larvae are alligator-shaped with long, piercing mandibles. They are active predators of soft-bodied insects. Brown lacewing adults are reddish brown. They have large, membranous, brown wings and long antennae with a long, thin body. They are smaller than the green lacewing. The brown lacewing lays several hundred oval eggs per female on the undersides of leaves; the eggs are not on stalks like green lacewing eggs. The larvae appear similar to green lacewing larvae. They are gray to brown and alligator-like. They have large, sickle-shaped mandibles.

  • Ichneumonids

    Ichneumonids are small black, orange or yellow wasps that prey on larvae of grape berry moth and other insects. Adults are less than 10 mm long, and many species are found in vineyards and surrounding woods.

  • Lady beetles

    Several species of lady beetles are active in vineyards. They are generally oval and red to orange with varying numbers of dark spots. Both adults and larvae are predators, eating soft-bodied small insects.

  • Minute pirate bugs

    Adult minute pirate bugs are black with white markings.

  • Multicolored Asian lady beetle

    The multicolored Asian ladybeetle, an introduced species, feeds on pests during summer. They may be many colors with several or no spots and can be distinguished from other ladybugs by the black M or W (depending on the viewing direction) between the head and abdomen (see photo).

  • Parasitic wasps

    Most parasitic wasps are tiny, and they often develop inside their hosts, so detecting them can be difficult. Some recognizable signs of parasitism include unusual host (pest) behavior, host body darkening, and the presence of emergence holes or cocoons on the pest.

  • Predatory mites

    Predatory mites can be distinguished from pest mites by observing their movement. When disturbed, predators generally move more quickly than pest mites. A ratio of one predator to 10 pest mites is often sufficient for effective biological control.

  • Shield bugs

    Many shield bugs, pentatomids, are predatory and can attack beetles and caterpillars.

  • Spiders

    live in the grape canopy and eat small insects.

  • Syrphid fly

    Syrphid fly adults resemble bees but have only one pair of wings and much shorter antennae. They can be seen hovering in the air near plants. Their larvae are predators. Syrphid fly larvae are usually light green, legless maggots, rounded at the rear and tapering to a point at the head. When the maggot is crawling, the head moves from side to side.

  • Tachinid fly

    Tachinid fly adults are hairy and bristly. Their larvae feed on the larvae of some pests.

  • Trichogramma wasps

    Trichogramma wasps are egg parasites of many insects, including grape berry moth and leafrollers. Parasitized eggs are dark black rather than the yellow-cream of healthy eggs.

The MSU IPM Program maintains this site as an access point to pest management information at MSU. The IPM Program is administered within the Department of Entomology, fueled by research from the AgBioResearch, delivered to citizens through MSU Extension, and proud to be a part of Project GREEEN.