The Dirty Dozen Bad Garden Bugs

The Dirty Dozen Bad Garden Bugs

These dirty dozen bad garden bugs are worth getting to know and identify. Exterminating these pests is easier if you get the kids involved. 

1.  Dirty Dozen Bad Garden Bugs: Aphids

Plant aphids are little pear-shaped bugs that live to suck the life out of the tender greens on your plants. They come in various sizes, shapes, and colors: green, red, black, yellow, or brown.

They don't have a discriminating palate, though - they'll attack various vegetables, legumes, stone fruit crops, roses, apples, and ornamentals. 

Spray these bad guys off your plants with water from the garden hose or a spray bottle. (And encourage good garden bugs that eat them for you!)

2.  Corn Earworms

The small, white moth eggs that produce the corn earworm are often deposited directly on the silks of corn ears or the foliage of tomatoes, allowing the newly hatched caterpillars to burrow immediately through the silks and into the tops of the ears (often leaving a telltale hole). Handpick these nasty garden bugs off your plants.

Handpick these nasty garden bugs off your plants.

3.  Tomato Hornworms

Tomato hornworms can ruin your tomato crop in record time. They feed non-stop, creating spotty and chewed leaves and fruit. They do the most damage in the caterpillar, or larvae, stage.

Handpick these bad garden bugs off your plants on sight.

4.  Vine Borers

The vine borer commonly attacks summer squash, winter squash, and pumpkins. Cucumbers and melons are less frequently affected. The adult borer bug resembles a wasp. It is about 1/2 inch long with an orange abdomen with black dots.

Get rid of these bad garden bugs using the basic stem borer control method: Insert the wire into its hole in the stem and skewer.

5.  Cucumber Beetles

Cucumber beetles are nasty little pests that attack cucumbers and related plants (squash, melons, pumpkins). The beetles are 1/4-inch-long yellow-green insects with black stripes or spots.

They create holes in the leaves and hide out on the bottom side of the foliage. Their green color makes them difficult to detect.

If that's not bad enough, the pests also carry and spread a disease called bacterial wilt. Plants infected with the disease begin to wilt and die.

Handpick these killers off your plants upon sight.

6.  Cutworms

Cutworm is the name used for the larvae of several species of adult moths. They do the most damage early in the gardening season when they emerge from hibernation.

Different species range in color from grey to pink, green, and black and can be as long as two inches. They can be solid, spotted, or striped.

Cutworms chew through plant stems at the base or even underneath the soil. Some species will climb plants as well and destroy foliage.

In most cases, entire plants will be destroyed; they do a lot of damage in no time. Use cutworm collars to remove these bad garden bugs.

You can create your own from sections of toilet paper, or paper towel rolls pushed into the ground around the stems of transplants.

7.  Cabbage Loopers

Cabbage loopers are tiny caterpillars with big appetites. They are one of the most destructive pests in vegetable gardens.

The bugs love plants in the cabbage family, including cabbage, broccoli, cauliflower, kohlrabi, and collard greens. It also likes potatoes, tomatoes, spinach, and cucumbers.

These 2-inch-long green worms have silvery or white stripes running down their backs. They typically eat holes in the leaves and hide out on the bottom side of the foliage.

Handpick cabbage loopers off your plants.

8.  Mealybugs

Mealybugs are fuzzy white bugs about an eighth of an inch long. They feed on plant sap and generally position themselves under leaves and at stem joints, attacking the plant with piercing mouths known as stylets.

This penetrative feeding style damages the plant by draining its sap and transmits bacterial and fungal infections. Heavy infestations can kill a plant.

Spray with water or swab off with alcohol on a paper towel or tissue.

9.  Spider Mites

Spider mites give gardeners severe headaches. When they attack your garden as a colony, the spider mite damage to the plant they choose to infest will be catastrophic.

People sometimes call them red spider mites because some other species are of different colors. The most common ones will be red—nasty creatures.

Spray spider mites off with water in a squirt bottle.

10.  Snails and Slugs

Adult snails have coiled shells on their backs and are 1 to 1.5 inches long. Slugs are without shells and are 1/8 to 1 inch long. Most slugs and snails are dark or light gray, tan, green, or black; some have darker spots or patterns.

Both slugs and snails eat soft, succulent plant tissue and rasp large holes in foliage, stems, fruit, and bulbs. A slug infestation can completely demolish seedlings and severely damage young shoots and plants.

Handpick, crush, or set out beer traps.

11.  Earwigs

These mini cockroach-like interlopers - commonly known as the pincher bug - invariably end up inside the lovely garden roses you bring inside your home.

Trap earwigs on sight and crush.

12.  Whiteflies

Spray off these insidious insects with water or set out yellow sticky traps to catch and remove them.

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