Liriomyza huidobrensis Blanchard larva South American leaf miner

Infestations of this polyphagous leaf miner have occurred recently in various European countries, including England and the Netherlands, the pest having been introduced into glasshouses from abroad, usually on chrysanthemum plants. In parts of southern Europe, this pest is also now established on outdoor plants. The characteristic leaf mines arise from close to the mid-rib or major veins; each then progresses as a tortuous gallery that often turns tightly back upon itself, and thus appears broad and blotch-like. Pupation occurs in the mine or in the soil, in a yellowish-brown or reddish-brown puparium. There are several generations annually. Feeding punctures formed in leaves by adult females are often very numerous. Larvae are up to 3.3 mm long; each posterior spiracle bears an arc of six to nine small pores (cf. Liriomyza trifolii, below).

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