Crepidodera ferruginea Scopoli Wheat flea beetle

Larvae of this flea beetle are associated with grasses and various weeds, and are often common in established leys. If infested pasture is ploughed-up and subsequently drilled with wheat or other cereal crop, the larvae may transfer to the new hosts. The larvae bore into the central shoots, each leaving a minute entry hole in the base; infested shoots eventually turn yellow (Plate 3e). Symptoms are usually most evident in spring and are superficially similar to those caused by shoot-mining dipterous larvae, such as wheat bulb fly, Delia coarctata, p. 197 (q.v.).


Adults occur from June to mid-September, and eggs are deposited in the soil at the base of various plants from August onwards. The eggs hatch within 3-4 weeks. The larvae then invade


Adult 3-4mm long, mainly reddish-brown to yellowish-red; elytra with relatively large and regularly spaced punctures; antennae 11-segmented; legs yellow, the first tarsal segment noticeably swollen (Fig. 215). Egg 0.75 x 0.45 mm, oval, yellow, darkening soon after being laid. Larva up to 5 mm long; body creamish-white and with a distinct anal pseudopod; pinacula and dorsal plates pale brown; head brown marked with black; thoracic legs small and partly black; anal plate brownish-black.

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