Insect Reproduction Growth and Development

Insect Reproduction

Most insects develop from an egg and, upon hatching, have a form different from that of the adult. The series of form changes as an insect develops from egg to adult is called metamorphosis. The young insect is covered with a more or less firm skin called the exoskeleton. As the insect feeds, it grows inside this skin, but it cannot increase in volume because it is restricted by its exoskeleton. A new elastic exoskeleton then forms under the old rigid exoskeleton. The old exoskeleton splits...

Hornworms Tobacco and Tomato

Yellow Spots Squash Leaves

Description Large, green caterpillars with white bars up to 3 or 4 inches long with a slender horn projecting from near the rear end. Damage Hornworms feeds on leaves, consuming large amount of foliage. Leaf loss may result in stunting and fruit scald. What to do Handpicking and destruction are often easily accomplished because of size. If large numbers of hornworms or plants are involved, use a recommended insecticide. Description Winding white trails or broad white spots appear on leaves,...

Cutworm

Description Plump, smooth-skinned, greasy-looking caterpillars up to 1 inch long often found curled up at base of plants. Damage Young transplants may be cut down at ground level, or branches may be removed from larger plants. Some damage to small tomato fruit may occur on older plants. What to do Physical barriers, such as aluminum foil wrapped around a 4-inch length of stem between leaves and roots may be used to protect newly set transplants. Baits, sprays or recommended insecticides may be...