When an insect is feeding on a plant, which types of tissue are at work to protect the plant and help it heal from injury?
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Borers rarely infest healthy plants growing in their natural environments. ... sun scald, or injuries can weaken them and make them more susceptible to attack. ... Feeding holes left by woodpeckers or other birds may indicate that a tree is infested. ... if spraying bark to protect trees from becoming infested by clearwing borers.
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Trichomes (“leaf hairs”) are specialized epidermal cells found on aerial plant parts that may provide both physical and chemical protection against insect pests. The velvety appearance of dusty miller (Senecio cineraria) is caused by thousands of tiny trichomes covering the plant's surface.
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