The parsley worm is a very large, two-inch long, green caterpillar with yellow-dotted black bands across each body segment. It has a pair of orange horns that it can project to scare off enemies. The beautiful black-and-yellow swallowtail butterfly is the adult form of the parsley worm. The parsley worm eats the leaves and stems […] More
Nematodes are microscopic soil-dwelling worms, many less than 1/16-inch long. There are beneficial nematodes and pest nematodes. Beneficial nematodes help turn organic matter into plant nutrients. They also prey on soil-dwelling plant pests such as white grubs and root maggots. Pest nematodes feed on plant roots, stunting and sometimes killing plants including many vegetables. Nematodes […] More
Harlequin bugs are shield-shaped, have black-and-orange or black-and-red triangles on the back, and are about ¼-inch long. The harlequin bug is a type of stink bug; it releases a foul odor when disturbed. Harlequin bugs–also called shield bugs–suck plant sap from cabbage-family crops and other vegetables. Harlequin bugs overwinter in garden debris and weeds. The […] More
Beet armyworm caterpillars are green with yellow undersides and dark green and yellow stripes. Fall armyworms are shiny brown with black heads and yellow stripes down their backs with a V-shaped white mark on the head. Armyworms are active at night and on overcast days. They get their name from their habit of marching in […] More
Mealybugs are very small soft, oval insects that are usually covered with white or gray waxy fluff. A mealybug is about 1/10 of an inch long. Mealybugs suck the juices from citrus, apples, pears, apricots, avocadoes, and grapes as well as ornamental and tropical plants. Honeydew excreted by mealybugs supports the growth of sooty mold […] More
Spider mites are nearly microscopic creatures about 1/50 inch long. They are reddish-brown or pale in color with eight legs, much like a spider. The spider mite is not an insect; it is an arachnid, the class of invertebrate animals that includes spiders. Good Products for Pest and Disease Control at Amazon: Mites are the […] More
Ants are an important component of the garden ecosystem. Ants are cleaners: they eat and help decompose organic matter in the soil, enriching the soil. Ants also eat pests insects such as fleas, fly larvae, and termites. Ants tunneling in the soil improve soil aeration which is helpful to plant roots. Ants become a garden […] More
Adult leafminers are black-bristled gray or black flies usually with yellow stripes about 1/10-inch long. Larvae leafminers are stubby, green translucent maggots about 1/8- inch long. Leafminer maggots feed between the upper and lower surfaces of leaves creating tunnels or mines that appear irregular and white or brown on the surface. Good Products for Pest […] More
Whiteflies look like very tiny white moths. Like their close relatives aphids, they suck juices from tender plant leaves. Whiteflies congregate in large numbers on the undersides of leaves and fly up in a cloud when disturbed. Whiteflies are found year-round in warm climates; in colder climates, they are seen in the summer. They thrive […] More
The adult imported cabbageworm is a white day-flying butterfly with one to four black spots on its wings and a wingspan of 1½ to 2 inches. The cabbageworm larvae are 1¼ inch velvety, light-green caterpillars with a fine yellow stripe down the back. Imported cabbageworm larvae chew ragged holes in the foliage of cabbage-family plants […] More
Weevils are oval, brownish-gray or black, flightless, hard-shelled beetles about ⅓-inch long with a pronounced snout. Weevil larvae are plump, white grubs up to ½-inch long with yellowish-brown heads. Adult weevils chew on leaf edges leaving small scalloped bite marks. Larvae are soil-dwelling and feed on plant roots. Weevil-chewed leaves do little harm to plants, […] More
Adult tarnished plant bugs are oval and small, just ¼ inch big. They are brown mottled with yellow, bronze, or reddish marks and each forewing is black-tipped with a yellow triangle. Tarnished plant bug nymphs are yellow-green and wingless, somewhat similar to adults in appearance. Tarnished plant bug eggs are yellow and long and curved. […] More
Stephen Albert