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Common Pests in Agriculture

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Corn Earworm

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The Corn Earworm, or tomato fruitworm, is a pest that feeds on corn kernels and a variety of other plants. Management techniques include crop rotation, timed insecticide application, and planting BT corn, which has been genetically modified to express a toxin that targets the pest.

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Root-knot Nematodes

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Root-knot Nematodes are microscopic worms that create galls on the roots of plants, disrupting water and nutrient uptake. Management includes crop rotation, growing resistant varieties, and applying organic amendments like compost to foster nematode-suppressing microorganisms.

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Aphids

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Aphids are small sap-sucking insects that can cause a variety of plant problems, including stunted growth, yellowing leaves, and a sticky residue known as honeydew, which can lead to sooty mold. Control strategies include introducing natural predators like ladybugs, applying neem oil or insecticidal soap, and encouraging healthy plant growth practices.

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Armyworms

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Armyworms are caterpillars that consume a large amount of foliage across different crops, often moving in large groups. Control involves monitoring for early signs, using pheromone traps for mature moths, and applying insecticides or natural predators like birds.

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Squash Vine Borer

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Squash Vine Borers are moth larvae that bore into squash family stems, causing wilting and plant death. To prevent damage, wrap stems with foil or pantyhose, practice crop rotation, and apply BT or appropriate insecticides if necessary.

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Cutworms

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Cutworms are the larvae of nocturnal moths and are known for cutting down young plants at the soil line during the night. Control measures include using cutoff collars around seedlings, regular tilling of the soil, and applying Bacillus thuringiensis (BT), a natural soil-borne bacterium.

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Japanese Beetles

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Japanese Beetles are invasive, metallic-green beetles that skeletonize the foliage of many garden plants. Combat them by handpicking, using traps, applying neem oil, or introducing beneficial nematodes that target their larvae.

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Tomato Hornworm

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The Tomato Hornworm is a large caterpillar that can defoliate tomato plants and other solanaceous crops. Handpick the caterpillars, introduce beneficial insects like braconid wasps, and till the soil at the beginning and end of the season to destroy larvae.

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Thrips

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Thrips are tiny pests that feed on plants by puncturing and sucking up the contents, leaving silvery streaks or stippling on leaves. They can also transmit plant viruses. Controlling thrips includes pruning affected areas, applying insecticidal soaps or neem oil, and releasing predatory insects like lacewings.

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Colorado Potato Beetle

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The Colorado Potato Beetle is a major pest of potato plants and can devour the foliage, leading to reduced yields. Control strategies consist of crop rotation, using floating row covers, and applying insecticides or BT.

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Spider Mites

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Spider Mites are tiny arachnids that cause yellow, stippled leaves and can spin fine webs on plants. Control options include increasing humidity, introducing predator mites, and applying horticultural oils or miticides.

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Whiteflies

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Whiteflies are tiny, white-winged insects that feed on the undersides of leaves, leading to plant weakness and the spreading of viral diseases. To manage whiteflies, use yellow sticky traps, insecticidal soaps, or predators such as lacewing larvae, and ensure good greenhouse hygiene.

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