The bees that cause precise circles or ovals in foliage are small and hairy, either black, green, purple or blue. They seem to prefer foliage of roses, although any tree or shrub that has a shiny, firm leaf may be cut. Bees are docile and rarely sting humans and can be beneficial due to pollination. Eliminate potential nesting sites around rose bushes by clearing away weeds and leaf debris or cover plants with floating row covers. There is no cure.
These bugs are diamond shaped, dark brown or black, 1/2″ in size. They hide on the underside of leaves. When they are caught and crushed they emit a foul odor. Squash bugs feed on cucumber, melon, pumpkin and squash. They suck plant juices from the leaves which will show spots … Read More
Snails have shells, they travel by extending the length of their bodies along a patch of slippery, silvery slime. They eat any and all garden plants leaving large ragged holes in leaves. They feed at night or on overcast or rainy days, hiding under cover when the sun shines. Eliminate … Read More
Slugs thrive in moist, shady sites. They often hide under foliage rosettes for protection from drying sunlight. Silvery trails along the ground and on leaves are signs of their presence. They can decimate plants in a short time. Hand pick them to protect plants from looking ragged. Snail bait can … Read More
Psyllids are small winged insects called jumping plant lice. They are greenish or brownish and no more than 1/10″ long. They have antennae and clear wings that fold into a triangular shape and jump up when disturbed. They target acacia, boxwood, eucalyptus, laurel, magnolia, and pear trees. They will suck … Read More
Oak moths cause visible damage to oak trees through the west. They are tan or gray with a 1″ wingspan and noticeable veining on their wings. They are attracted only to oak trees, chewing leaves, making holes, and eventually defoliating branches. Infestations cannot be prevented. Kill larger caterpillars by spraying … Read More
Leaf rollers are caterpillars that feed on leaves, shoots, and fruit. Larvae roll themselves up inside leaves, sometimes spinning a web to join fruit and leaves together. Other pests and fungal rots later enter the holes that leaf rollers chew in fruit. Treatment: Thuricide
Leaf roller larvae will roll themselves up inside leaves, spinning a web to join leaves together. Other pests and fungal rots later enter the holes that leaf rollers chew. Treat with Thuricide.
Lacewings are 1/2 inch in length, a delicate green color, and have transparent wings. They feed on plant nectar and pollen. Lacewings consume many garden pests such as aphids, mealybugs, scale, leafhopper nymphs, whiteflies, small caterpillars and spider mites, making them a beneficial garden insect. The larva looks somethng like … Read More
Sporadic sightings have occured in western states. The body is 1/2″ long, has a distinctive metallic green sheen, and wing covers are copper colored. Larvae that live in the soil are white, C-shaped grubs. Adults feed on flowers and foliage during the day. They can fly as far as 5 … Read More
These 1/2″ long winged insects with enlarged hind legs can be brown, green or yellow. Although they chew grass, they are usually not a problem, but in large numbers can strip plants right to the ground. They can be controlled with insecticide.
Companion planting is a concept that calls for planting two kinds of plants in a bed to discourage insects from attacking one of the two. The most common example is planting marigolds in the vegetable garden. Certain soil loving nematodes attack the roots of vegetables; marigold roots secrete a substance … Read More