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Cutworms are moth larvae that hide under litter or soil during the day, coming out in the dark to feed on plants. A larva typically attacks the first part of the plant it encounters, namely the stem, often of a seedling, and consequently cuts it down; hence the name cutworm. Cutworms are not worms, biologically speaking, but caterpillars.
Caterpillars of most species eat plant material (often leaves), but not all; some (about 1%) eat insects, and some are even cannibalistic. Some feed on other animal products. For example, clothes moths feed on wool, and horn moths feed on the hooves and horns of dead ungulates.
[1] [12] Fenced-in browsing animals may rely on the mopane, and on other trees favoured by the caterpillars, as an important part of their diet. Some farmers therefore view the mopane worm as competition for their livestock, and attempt to eradicate the "pest" with insecticides and the like.
Herbivory: Caterpillars of most Noctuidae feed on plants; some feed on poisonous plants and are unaffected by their chemical defences; for example, the splendid brocade moth (Lacanobia splendens) feeds on cowbane (Cicuta virosa), a plant that is notoriously toxic to vertebrates. [19]
The larvae are defoliators, skeletonizing the leaves they feed on, but only the late summer batch of caterpillars is plentiful enough to do much damage to crops. This species tends to have two to three life cycles per year, with one hibernating for the winter in temperate climates.
The tree in which a female deposits the eggs is where the larvae will choose to feed. The most common host plants that caterpillars feed on are leaves from stonefruit trees. However, larvae will feed on many other types of tree foliage. Adult moths do not eat and live for 1–4 days. [7]
Butterflies need specific plants, called host plants, where they can lay their eggs and caterpillars hatch. Not all caterpillars will become butterflies, of course, because some are eaten by birds ...
The egg masses, larvae (caterpillars), and adults of O. lunifer all have urticating scales or hairs that are harmful to humans and other animals. Records of Bag-shelter nests and caterpillars causing adverse effects on the health of humans and livestock date back to the early 1900s [8] (as Teara contraria)].