New PDF release: Agromyzidae (Diptera) of Economic Importance

By K.A. Spencer

ISBN-10: 9048185130

ISBN-13: 9789048185139

ISBN-10: 9401706832

ISBN-13: 9789401706834

The unique stimulus which begun KENNETH SPENCER on a research of the Agro­ myzid flies was once a call for participation, which he approved, to translate from the German the monograph on Leaf Miners through Professor E. M. HERING. From this built approximately twenty years of collaboration until eventually Professor HERING's demise in 1967. Dr. SPENCER has himself defined over six hundred new species within the family members, a lot of which he amassed and reared from identified host vegetation in the course of his large travels to the entire 5 major continents. principally because of his paintings, the variety of species identified in Britain has elevated from ninety in 1945 to 313 this present day. he's hence uniquely certified to write down this booklet in regards to the hundred and fifty or so species that are usually linked to cultivated vegetation. a lot of the taxonomic aspect supplied the following may be of worth essentially to experts; yet with assistance from a microscope and the botanical host checklist (Chapter 2) and the various illustrations (mostly ready by way of ANN SPENCER) these in agri­ cultural institutes and somewhere else may still now have the ability to determine nearly all of species stumbled on attacking vegetation in any a part of the world.

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Extra resources for Agromyzidae (Diptera) of Economic Importance

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10); posterior spiracles in form of irregular elliptical chitinized plates, each on a conspicuous protuberance and with 12 spiracular bulbs and no trace of a central horn. Puparium: yellowish- to reddishbrown, posterior spiracles as in Fig. 11. HosT-PLANT. Lablab niger L. (Bonavista bean). BIOLOGY. 'Most eggs are laid in soft young pods in which the seeds are small and the pod walls are still in contact. In these young pods the larva mines in the wall, frequently escaping into the lumen where it feeds on the inner surface of the pod and on the seeds.

On many plants the cotyledons remained confined within the seed coat. Such plants usually died. Plants from damaged seeds weighed only two-thirds as much as those from undamaged seeds thirteen days after planting. However, this difference diminished as the growing season progressed and on the final date of sampling, 27 days after planting, plants from damaged seeds weighed four-fifths as much as those from undamaged seeds. Most of the performance difference between damaged and undamaged seed in · the field was attributable to the reduced emergence of plants from damaged seed; production of abnormal cotyledons unquestionably was ascribable to the planting of fly-damaged seed.

Agromyza hordei Spencer Agromyza intermittens Beck. Agromyza megalopsis Her. ) Pseudonapomyza spinosa Spencer Phytomyza fuscula Zett. Phytomyza nigra Mg. ) Host list of Agromyzid pests Host Oryza sativa L. Panicum miliaceum L. Panicum sp. Pennisetum purpureum Schum. Pennisetum typhoideum Rich. Phleum pratense L. Saccharum officinarum L. Secale cereale L. ) Pers. Triticum aestivum L. Zea mays L. Species Agromyza albipennis Mg. ) oryziuora Sp. Agromyza parvicornis Lw. ) Agromyza penniseti Spencer Agromyza pennisetiuora Spencer Phytomyza fuscula Zett.

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

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