![]() | Click Beetles - Dalopius sp. and Ampedus sp. Order Coleoptera / Suborder Polyphaga / Superfamily Elateroidea / Family Elateridae -- click beetles Live adult click beetles photographed at Winfield, Illinois. Size: 15mm [Cirrus Home] [Beetles Main Page Graphics] [Beetles Alphabetic Table of Contents] |
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Beetles in the family Elateridae are commonly called click beetles, elaters, skipjack, snapping, or spring beetles. They posess a mechanism by which they can violently launch temselves several inches into the air, a method they use to avoid predators and right themselves if they happen to fall on their backs. A spine on the prosternum can be snapped into a corresponding notch on the mesosternum, producing a violent "click" which can bounce the beetle into the air. There are about 7000 known species. Click beetles undergo complete metamorphosis: Egg - larvae (beetle larvae are called "grubs") - pupa - adult. Some species of click beetle have larvae that have a hard shell, commonly called "wireworms." These grubs can be serious agricultural pests, feeding as the do on the roots of plants (corn and other cereal grains are often attacked) during their 1-3 year portion of the life cycle. Wireworm larvae are hard, smooth, slender, wire-like worms varying from 2 to 1 inches in length when mature. They are a yellowish-white to a coppery color with three pairs of small, thin legs behind the head. The last body segment is forked or notched |

Larvae move up and down in the soil profile in response to temperature and moisture. After soil temperatures warm to 50 F, larvae feed within 6 inches of the soil surface. When soil temperatures become too hot (>80 F) or dry, larvae will move deeper into the soil to seek more favorable conditions. Wireworms inflict most of their damage in the early spring when they are near the soil surface. During the summer months the larvae move deeper into the soil. Later as soils cool, larvae may resume feeding nearer the surface, but the amount of injury varies with the crop. | |
| References 1. Philip Glogoza, extension entomologist, North Dakota State University Wireworm Management for North Dakota Field Crops (Used with permission) |