Pegomya euphorbiae (Kieffer, 1909)

on Euphorbia

gall

oviposition on the shoot tip, between the youngest leaves or in the inflorescence. During about a month the larve performs as a stem borer, tunnelling its way down to the underground base of the stem. Here the stem swells to an onion-like gall of about 1.5 cm high. The stem above the gall dies off. The larva lives for another 4-6 weeks in the gall, ultimately pupating there.

hostplants

Euphorbiaceaae, narrowly monophagous

Euphorbia cyparissias.

Rarely E. esula subsp. tommasiniana, lucida, seguieriana subsp. niciciana.

synonyms

Agromyza euphorbiae.

notes

deployed in North Americca in biological weed control.

references

Buhr (1964a), Gassmann (1980a), Kieffer (1909a), Michelsen (1988a), Gassmann (1989a), Gassmann & Shorthouse (1990a).

mod 30.iv.2018