Agromyzidae (Diptera) of Economic Importance by K.A. Spencer

By K.A. Spencer

The unique stimulus which all started KENNETH SPENCER on a learn of the Agro­ myzid flies used to be a call for participation, which he accredited, to translate from the German the monograph on Leaf Miners via Professor E. M. HERING. From this built approximately twenty years of collaboration until eventually Professor HERING's dying in 1967. Dr. SPENCER has himself defined over six hundred new species within the kin, a lot of which he amassed and reared from recognized host vegetation in the course of his wide travels to all of the 5 major continents. principally because of his paintings, the variety of species identified in Britain has elevated from ninety in 1945 to 313 this day. he's therefore uniquely certified to put in writing this publication in regards to the hundred and fifty or so species that are usually linked to cultivated vegetation. a lot of the taxonomic aspect supplied right here may be of worth basically to experts; yet with assistance from a microscope and the botanical host record (Chapter 2) and the varied illustrations (mostly ready by way of ANN SPENCER) these in agri­ cultural institutes and somewhere else should still now manage to determine the vast majority of species came upon attacking plants in any a part of the world.

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HEAD (Fig. 7). Frons equal in width to eye, not projecting above eye in profile; 2 reclinate ors, 2 or 3 somewhat incurved ori; orbital setulae sparse, short, reclinate; ocellar triangle well defined, apex extendingtolowerors; lunule semicircular; jowls narrow, about 1/10 height of eye; third antenna! segment small, round, arista long, distinctly pubescent. MESONOTUM. 2 strong de, acrostichals numerous, in some 10 rows. WING. 3 mm, costa extending strongly to apex of vein M 1 + 2 , last section of Ms + 4 two-thirds length of penultimate.

38-41. : 38, head; 39, aedeagus, side view; 40, same, ventral view; 41, surstylus. n. 2 mm Although there is no information available on the detailed biology and damage caused to the host-plant by this species, in view of its substantial size, the larva is clearly in a position to destroy young plants, and the species must be considered of potential economic importance. 51 Melanagromyza sojae (Zehntner, 1900) -Australia, Tropical Asia to Egypt and Africa Aou LT. Small black and green species. HEAD.

Phaseoli. All these species are strictly limited to the Leguminosae for their hosts but 29 within this family many species show a considerable degree of oligophagy, the genera Dolichos, Phaseolus and Vigna, for example, each being attacked by a number of species. It has therefore seemed more practical to arrange the discussion systematically by pests rather than alphabetically by crops. n. - Iraq HEAD. Frons narrow, equal to width of eye, not projecting above eye in profile; 2 ors, 2 ori, the lower incurved; orbital setulae in single row, reclinate; ocellar triangle extended, apex reaching level of upper ori; orbits well differentiated but narrow; jowls deepest in centre below eye, about 1/7 vertical height of eye, cheeks visible as narrow ring (antennae missing in both available specimens).

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