Our next book, “What’s Wrong With My Vegetable Garden?” is coming out this December, 2011, from Timber press. It’s our third book from this premier publisher.

This book is available by pre-order from timberpress.com and at amazon.

Have you ever served broccoli at the dinner table only to find green worms cooked in your food? Yuk! A client of ours says she’ll never grow broccoli again. Too many worms. And she refuses to dump poison on her food to kill the worms. We’re showing her how to grow organic food that does not have caterpillars.

 The cabbage worm eats holes in the leaves of your cabbage, broccoli, cauliflower, and other brassicas. It only devours the foliage of vegetable crops and weeds in the cabbage family (Brassicaceae). It does not move by looping like an inchworm. It crawls about like most other kinds of caterpillars.

A white butterfly, the adult cabbage worm feeds on nectar of a wide variety of flowers. Like all butterflies, she has straw-like mouthparts. She can’t eat leaves, only her babies can do that. She’ll lay her eggs, usually one at a time, on the underside of brassica leaves.

The cabbage looper, another caterpillar that trashes your brassicas, moves like an inchworm. It loops its head-end forward first, then brings the rear-end forward arching its body into an upside-down U. It has an appetite for many different kinds of vegetables, not just cabbage family members.

A grayish-brown moth with a white monogram on its forewings, the cabbage looper adult flies about and lays her eggs at night so you usually won’t see her. The moth, like the butterfly, has straw-like mouth parts.

Brassicas under row covers exclude the adult butterflies and moths. Keep the adults out and you’ll avoid the damage that their caterpillars do to your crops. Cover the plants with a lightweight, white fabric that lets in air, light, and water but keeps bugs out.

Cocoons of a tiny parasitic wasp hang like little white footballs off a tomato hornworm. The female wasp laid her eggs inside the caterpillar, the eggs hatched, and the baby wasps (maggot-like) ate the caterpillar alive from the inside out. When the wasp larvae matured they ate their way through the caterpillar’s skin and spun all these little cocoons. Pretty soon the baby wasps will all fly away and hunt down more caterpillars. A gruesome tale, we know, but the point is that nature has lots of little helpers to aid you in your endeavors to grow clean, healthy vegetables without spraying poison on your food.

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It’s August and everybody’s vegetable gardens crank out delicious organic food. Yum-oh! But sometimes gardeners find holes in the middle of the leaves of their vegetable crops. Large holes. Many of them. Who’s the culprit? Caterpillars? Grasshoppers? Beetles?  Or maybe snails!

Snails and slugs both glide through your garden on a ribbon of slime, the shiny, sparkly stuff the snail in the photo above is leaving behind. At bottom left you can see the slime glistening on the ground. These animals are mollusks, related to oysters, clams, and octopus.

A trail of dried slime across the large hole in this green pepper is the definitive clue. A snail or slug definitely made this hole. Anytime you find holes in the leaves or fruit of your vegetable plants look for slime. Slime, this incontrovertible evidence tells you who to blame. And then you know how to fix it.

If you catch the buggers red-handed in the act of destroying your produce you don’t even have to search for evidence. This slug has just devoured the side of a friend’s tomato. Yuk!

But often, you can’t catch them in the act because they hide in the heat of the day. They come out at night, on overcast days, during rain storms, or when the sprinklers come on. They like it cool and wet and they hide under boards and pots – in any cool, shady, damp place where they can survive the mid-day sun and heat.

You can go out into the garden at night with a flashlight and hand pick snails easily. Just pick them up by the shell put them in a brown paper bag. Then you can step on it to crush the critters and bury it in your compost. Slugs, however, have no shells and are too slimy to pick up. Because slugs and snails hide during the day you can also make traps for them and that way you don’t have to go out at night with a flashlight. Put upside-down flower pots around your garden. They’ll hide inside them where you can easily harvest and destroy them in daytime comfort.

Iron phosphate controls these mollusks in the garden. You’ll find it under the brand name Sluggo. Iron phosphate is not toxic to pets, children, or birds. It also has no effect on insects. It kills mollusks and only mollusks. Slugs and snails eat it and they die.

 Older style, toxic, non-organic slug bait uses a poison called metaldehyde. Metaldehyde is poisonous to your pets, your kids, and wildlife. Avoid it.

 Some people swear by beer to kill slugs and snails. You’re supposed to put a shallow bowl of beer out in the garden, the slugs and snails are attracted by the odor, crawl into the beer and drown. Maybe I just don’t do it right but it’s never worked for me.