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A Gardener's Guide To Good And Bad Pests

  You want your garden to thrive, and anything that attacks it is your opponent. You might think that if it's in your garden and it crawls or flies, it needs to die. Some of the inhabitants of your garden, however, are helpful. Which of them are on your side? Which ones are not? Let's look at some examples. Tomato Hornworm This large green caterpillar will someday become a moth, but in the meantime, it feeds on your plants. It can be up to four inches long and has a horn on its posterior. This is no magical unicorn, for it destroys your tomatoes. As the caterpillar grows in size, its appetite grows, and it eats at a faster rate. Its pupal form exists in the soil during the winter, dreaming of tomatoes as you slog through the gardening off-season. One way to prevent them is to till your soil (before winter) once the growing season is over. Since they're large and easy to find, you can also pluck them off your tomatoes and dispose of them. Aphids These little green guys are e