By K.A. Spencer
The unique stimulus which all started KENNETH SPENCER on a research of the Agro myzid flies was once a call for participation, which he accredited, to translate from the German the monograph on Leaf Miners by way of Professor E. M. HERING. From this built approximately two decades of collaboration until eventually Professor HERING's dying in 1967. Dr. SPENCER has himself defined over six hundred new species within the family members, lots of which he amassed and reared from identified host vegetation in the course of his large travels to all of the 5 major continents. mostly due to his paintings, the variety of species identified in Britain has elevated from ninety in 1945 to 313 this day. he's hence uniquely certified to write down this publication concerning the hundred and fifty or so species that are on a regular basis linked to cultivated vegetation. a lot of the taxonomic element supplied right here could be of worth basically to experts; yet with the aid of a microscope and the botanical host checklist (Chapter 2) and the various illustrations (mostly ready via ANN SPENCER) these in agri cultural institutes and in different places may still now be ready to establish the vast majority of species came upon attacking vegetation in any a part of the world.
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Additional resources for Agromyzidae (Diptera) of Economic Importance
Walp. (cow-pea). BIOLOGY. Not known in detail, but one specimen has been reared from stems at lbadan, Nigeria, together with specimens of Ophiomyia spencerella (Greathead) and 0. phaseoli (Tryon). DISTRIBUTION. Seychelles; Tanganyika;- Kenya; South Africa: Barberton; Nigeria: Ibadan. EcoNOMIC IMPORTANCE. Probably slight, as this appears to be an uncommon species. However, it is certainly of interest as an additional species in the complex attacking cowpeas. It is readily distinguishable by the milky-white wings with colourless veins, by the approximated cross-veins and the brilliantly shining greenish-black ocellar triangle.
LEGUMINOUS CROPS 1: INTERNAL FEEDERS Beans, pulses and legumes are of extreme importance as a source of food, particularly in the tropics, and substantial damage is caused to a number of crops by several different species considered here. Others occur regularly on cultivated leguminous crops without normally having any significant effect on yields, but even these species deserve attention, as with periodical build-ups in population levels local infestations may from time to time prove to be severe.
8%. 3%, respectively. The percentage of damage to pods in No. 2. 8% of individual grains. 48 SINGH and BERI (1971) report that in the Agra area 'damage to the crop exceeds more than 40% of the yield'. THEVASAGAYAM and CANAGASINGHAM (1960) investigated pests of dhal in Ceylon. They found that M. obtusa was apparently not present as a pest in the Maha season which last from January to March. (However, I found larvae and puparia in pods of Phaseolus radiatus L. ) In the Yala season, on the other hand, with warm, dry weather, M.
Agromyzidae (Diptera) of Economic Importance by K.A. Spencer