Scientific name: Liriomyza trifolii
Liriomyzid leafminer adults are small, shiny, black flies with a bright yellow, triangular spot on the upper thorax. Eggs are white and oval and laid within the leaf. Larvae feed between leaf surfaces, creating meandering tracks or mines. Mature ... [... more]
University of California IPM |
Asparagus Miner
Larvae feed beneath the epidermis of the stem and develop through three instars in 2 to 3 weeks. Before pupating they usually mine toward the base of the plant. Pupation lasts 17 to 21 days and new adults usually emerge in July. The life cycle is ... [... more]
ipm.ncsu.edu |
Figure 1: Ponderosa pine budworm larva in infested shoot.
Ponderosa pine budworm larvae feed on new growth of ponderosa pines, in extreme cases causing severe tree damage. Control with insecticides may be appropriate in some cases. Ponderosa pine budworm larvae feed on new growth of ponderosa pines, in ... [... more]
Colorado State University Extension |
RHODODENDRON INSECTS
Black vine weevil and strawberry weevil adults feed at night, notching the leaf margins and making holes in the leaves. The larvae feed on the roots and bark, girdling and killing the plant. Use acephate to control black vine weevil. Lace bugs ... [... more]
Old House Web |
HEUCHERA INSECTS
Strawberry root weevil larvae feed on the roots and crowns in the spring. The crowns turn black and die. No chemical control is listed. Home Improvement Topics Stoves Closet Doors Pellet Stoves Cabinetry Corbels Doors Fireplace Inserts Catalogs ... [... more]
Old House Web |
CATTLEYA INSECTS
The cattleya weevil adults are less than 1/2 inch long with white marks on the back. These feed on the surface of pseudobulbs and puncture the leaf surfaces. The larvae feed on the leaves and develop on stems and pseudobulbs. The injury allows ... [... more]
Old House Web |
TAXUS INSECTS
Black vine weevil larvae feed on roots, resulting in needles yellowing. Severe infestations kill the plant. The adults feed at night, notching the needles. Check needles near the center of the plant for notching. Use sprays of acephate. ... [... more]
Old House Web |
Gypsy Moth
The insect overwinters as an egg which hatches in the spring about the time amelanchier blossoms. The larvae move up the tree then suspend themselves from a thread that allows them to be carried by the wind to other trees. The larvae feed for ... [... more]
Old House Web |
DAHLIA INSECTS
Aphids suck plant juices and are controlled with Diazinon dust or sprays of Sevin, Orthene or rotenone. European corn borer larvae feed on young leaves and flowers causing them to be distorted and brown. They bore in the stem causing death of ... [... more]
Old House Web |
Western Corn Rootworm
Western corn rootworm larvae feed on root hairs and small roots; larger rootworms feed on primary roots. Crop rotation is the most consistent and economical means of controlling western corn rootworm populations. Cultural practices that promote ... [... more]
Colorado State University Extension |
DAHLIA INSECT PROBLEMS
Aphids suck plant juices and are controlled with dusts or European corn borer larvae feed on young leaves and Stalk borer also bores in the stems. Leafhoppers cause leaf discoloration along the leaf If not controlled, the plants are ... [... more]
Michigan State University Extension |
Corn Insects
Legless maggots attack and destroy the seed during or before sprouting. Use Diazinon at planting time. The larvae feed on the leaves then bore into the stem. The insects are a problem from late May to early June and they may go from the leaves to ... [... more]
Old House Web |
