Vegetable Pests
Cabbage Moth -
As larva these guys do severe damage. They attack all members of the cabbage family as well as lettuce. The brownish cabbage looper moths lay pale green eggs on the topsides of leaves in the evening. Mature imported cabbageworms are white butterflies that are frequently seen around cabbage in the daytime. The female attach yellow bullet-shaped eggs to undersides of leaves. Cabbageworms may be present from early spring until late fall in the northern U.S. worms spend the winter as pupae attached to a plant or nearby object.
Control the worms with a powder like Sevin, by Ortho. Insecticidal soap, BT, and any insecticide with diazinon or pyrethrins are also effective. Adult mothes do little damage except lay eggs for next generation.
Leaf Hopper - 
Leafhoppers feed on many vegetables and small fruits. They generally feed on the undersides of leaves, sucking the sap, which causes stippling. Severely infested vegetables will become weak and will not produce fruit. Leafhoppers at all stages of maturity are active during the growing season. They hatch in the spring from eggs laid on perennial weeds and ornamental plants. Even areas where the winters are so cold that the eggs cannot survive are not freee from infestation because leafhoppers can migrate long distances in the spring.
Destroy nearby weeds, especially thistle and dandelions that may harbor leafhopper eggs. Use an insecticide with diazinon or pyrethrins.
Hornworm - 
Hornworms feed on many vegetable plants such as eggplant, pepper and tomatos. Each worm can eat an enormous quantities of foliage. The adult hornworm moth is a large grey or brown creature with yellow or white markings that emerges from hibernation in late spring and feeds on nectar from annual flowers. The worms hatch from eggs laid on the undersides of leaves, and these young feed for three to four weeks. Then they crawl into the soil to repeat the cycle. There is usually only one generation in the northern U.S. and up to four generations inthe southern U.S..
Some hornworms have white sacs on their backs. This is a parasite wasp egg sac. The wasp enters the worms body and feed off the internal organs. Do not remove or treat hornworms with this white sac. The beneficial wasp will multiply and kill off other hornworms safely and naturally.
Like all soft bodied pest a powder usually does the trick. Use an insecticide like Sevin or anything that contains carbaryl or pyrethrins. BT is also an effective control. BT, Bacillus thuringiensis is a biological, living organism that feeds off of pests.
Snails and
Slugs 
These pests are mollusks and are related to clams, oysters, and other shellfish. They feed on a wide variety of plants, including ornamentals and vegetables. Like other mollusks, snails and slugs need to be moist all the time. for this reason they avoid the sun and dry places and hide during the day in damp places such as under flowerpots or thick ground cover and mulch. They emerge at night or rainy days to feed. The one big difference between these pests is the snail has a shell to withdraw to for protection. Females slugs lay their eggs on the undrsides of leaves, while the snail buries them in soil or mulch. Both produce a slimy mass for the eggs to develop in. The young are smaller versions of the parents. I would recommend beer traps, or egg shells. Sink bowls of beer into the soil over night and the slugs will be attracted to them. Or use clean eggshell fragments around the bottom of plants. The shells act as shards of glass that errate the soft bodies of the slug.
Cutworm -
Several species of cutworm attack plants in the vegetable garde. Surface feeding cutworms are common pests of young vegetables planted early in the season. A single surface-feeding cutworm can sever the stems of many young plants in one night; eating the stem just above the ground. Tomato, peppers, pea, and bean plants and members of the cabbage family are susceptible. Some cutworms can climb up the stems or trunks of grapevines and blueberry, bramble, tomato, and other garden plants to feed on young leaves, buds and fruits. Cutworms hide in the soil during the day and come out to feed after sunset. Adult cutworms are dark, night-flying moths with bands or stripes on their forewings.
Control with Sevin, diazinon, chlorpyrifos or methoxychlorMake collars around the base of plants made from aluminum cans, milk cartons, aluminum foil or the like to prevent pests from getting on plant. Like all large soft-bodied worms they can be physically picked off the plant and discarded
Leaf Miner Damage - 
Tomato Leaf
These insect pests belong to the family of leaf mining flies. The tiny black and yellow adult females lay eggs on the underside of leaves or inside leaves. the maggots that hatch from these eggs tunnel between the leaf surfaces feeding on internal tissues. The white tunnels in the leaves are called mines. Damaged leaves are no longer edible. Fruit is usually not effected but multiple generations can reduce yield.
When the egg clusters are first seen under the leaves, control with an insecticide with malathion or diazinon. Repeat applications are usually necessary. A good fall clean-up will reduce overwintering of eggs.
Grasshopper - 
On berries
Grasshoppers attack a wide variety of plants. They eat leaves and occasionally fruits, migrating as they deplete their food sources. In vegetable gardens, they are most numerous in the sections that are close to weedy areas. In late summer, adult female grasshoppers lay their eggs in pods in the soil. The adults continue to feeding until cold weather kills them. The eggs hatch the following spring. Grasshopper infestations are most severe during hot dry weather. The insects migrate into green gardens and yards as surrounding areas dry up in summer heat. Periods of cool, wet weather help keep these insect populations under control.
Use diazinon or Sevin at first sign of insects.
Flea Beetle - 
These beetles jump like fleas but are not related to them. Both adult and immature flea beetles feed on a wide variety of garden vegetable and berry plants. Immature beetles, legless gray grubs, injure plants by feeding on the roots and undersides of leaves. Adults chew holes in leaves. flea beetles are most damaging to seedlings and young plants. Seedlings that are chewed are susceptible to desiccation. Adults survive the winter in the soil or in garden debris. They emerge in early spring to feed on weeds until vegetables sprout or plants are set in the garden. Grubs hatch from eggs laid in the soil, and these pests feed for two to three weeks. After pupating in the soil, they emerge as adults to repeat the cycle. There are one to four generations each year. Adults may feed for up to two months.
Control with an insecticide containing carbaryl, diazinon, or pyrethrins. A good fall clean-up will prevent over-wintering of adults. Keep a close eye on new growth for damage.
Corn Earworm - 
For the corn farmers out there, you already know about these guys, but for the home gardener watch out for these guys. These worms are the most serious pests of corn. The insects attack many other garden vegetables and flowers as well and are also known as tomato fruitworms or cotton bollworms. Corn earworms are the larvae of light gray-brown moths with dark lines on their wings. In the spring, female moths lay yellow eggs sigly on corn silks and undersides of leaves. The worms that hatch from these eggs feed on the new leaves in the whorls. This feeding doesn't reduce the corn yield, but the leaves that develop are ragged and the plant may be stunted. More serious damage is caused when the worms feed on the silks, causing poor pollination, and when they feed on the developing kernels. Worms enter the ear at the silk end, or they may bore through the husk. there are several generations a year. In the southern United States, wheere these pests survive the winter, early and late plantings suffer the most damage. Adult moths migrate into northern areas, where late plantings are severely damaged. Undamaged parts of infested ears are edible.
Once the worms are in the ears, insecticides are ineffective. Treat plants with SEVIN or any inseticide with carbaryl if any worms are visible on the plant.
Cucumber Beetle - 
Cucumber beetles, both dtriped and spotted are common pests of cucumbers, melons, squash, nd pumpkins. Controlling these beetles is important because they carry two serious diseases that damage and may kill cucurbits: mosaic virus and bacterial wilt. Adult beetles survive the winter in plant debris and weeds. They emerge in the early spring and feed on a variety of plants. As soon as cucurbits are planted in the garden, the beetles attack the leaves and stems and may totally destroy the plants. Mature females lay their yellow-orange eggs in the soil at the base of plants. The grubs that hatch from these eggs eat the roots and stems below the soil line, causing stunting, wilting, or premature death. The slender white grubs feed for several weeks, pupate in the soil, emerge as adults to repeat the cycle.
Control with Sevin, diazinon, or pyrethrins.
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