Insect Management Handbook

Lecanium spp.

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Common Pests of Nursery Crops

Diabrotica undecimpunctata

Merodon equestis

Pest description and crop damage The adult narcissus bulb fly is about 0.5 inch long and closely resembles a small bumblebee. The larva is yellowish-white and 0.75 inch long. The maggots burrow into the bulbs near the basal plate and feed inside the bulbs, destroying bulb scale and flower parts. Infested bulbs may develop a few, grassy-looking leaves if the bulb is not too badly damaged. Severely damaged bulbs are soft, brown, and decayed.

Rhizoglyphus echinopus

Quadraspidiotus perniciosus

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Common Pests of Nursery Crops

Fruittree leafroller (Archips argyrospila)
Obliquebanded leafroller (Choristoneura rosaceana)

Leucoma salicis

Pest description and crop damage The adult moth is satiny white. Larvae are approximately 2 inches long when grown and reddish brown with white patches on top and tufts of hairs along the sides. They can defoliate cottonwood, poplar, and willow seriously. They occasionally attack oak and aspen.

See:

Common Pests of Nursery Crops

Several species, including Tetranychus spp.

See:

Common Pests of Nursery Crops

Cremona cotoneastri

Pest description and crop damage The cotoneaster webworm is a dark brown caterpillar, 0.25 to 0.5 inch long. It typically ties clumps of leaves together with webbing and feeds within the nests, skeletonizing leaves. The webworm is primarily a problem on Cotoneaster horizontalis (rock cotoneaster).