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Introduction Tomato (Lycopersicon esculentum L.) is one of themost cultivated vegetable crops in Uganda.Productionper annum is about 130,586 MT with yields rangingbetween 600 kg/ha and 7,125 kg/ha. Root-knotnematodes are the major nematode species causingdamage to tomato, resulting in yield losses as highas 80%.Abstract This book presents results from glasshouseexperiments conducted at the Institute ofAgricultural and Fisheries Research (ILVO) MerelbekeBelgium using nematode-laden tomato roots fromgrowers' fields in Uganda to establish the diversityof Meloidogyne spp. infecting tomato in Uganda,ascertain occurrence of agroecological species-specificity, as well as investigate the existence ofsingle or species? mixtures in these areas. Acombination of methods namely: molecular,biochemicalas well as morphological were employed to ensureaccurate identification of the species, as no singlemethod seemed conclusive. The methods used wereSpecies- specific PCR, Sequencing of the D2D3expansion region of the 28S rDNA gene, Isozymephenotypes and perineal pattern morphology.Target users Extension staff and Researchers. ... Read more

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This digital document is an article from Science News for Kids, published by Science Service, Inc. on December 2, 2009. The length of the article is 646 words. The page length shown above is based on a typical 300-word page. The article is delivered in HTML format and is available immediately after purchase. You can view it with any web browser.

Citation Details
Title: Flower family knows its roots.(jewelweeds)
Author: Stephen Ornes
Publication: Science News for Kids (Magazine/Journal)
Date: December 2, 2009
Publisher: Science Service, Inc.
Page: NA

Distributed by Gale, a part of Cengage Learning ... Read more

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In a cloak-and-dagger story of spies, saboteurs, and secret agents, Stephen Kinzer reveals the involvement of Eisenhower, Churchill, Kermit Roosevelt, and the CIA in Operation Ajax, which restored Mohammad Reza Shah to power in Iran. ... Read more

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For most of history, humans have made every possible effort to accurately foretell the weather, evolving from the use of guesswork, rule of thumb, and signs in the sky to the development of contemporary forecasting techniques drawn from two scientific disciplines, climatology and meteorology.

The Encyclopedia of Climate and Weather 2nd Edition provides a comprehensive history of the development of this practice, as well as provides a thoroughly up-to-date resource with many additions, revisions, and updates to this field of ever-increasing importance since the publication of the First Edition in 1996.In over 330 entries, the Encyclopedia covers essential topics that include the processes that produce weather, the circulation of the atmosphere that produces the world's climates, classification of climates, important scientific concepts used by climatologists and meteorologists, as well as the history atmospheric sciences, biographies of noteworthy contributors to the field, and significant weather events, from extreme tropical cyclones to tornadoes to hurricanes.New to this edition are articles on headline-grabbing topics that include the Kyoto Protocol, global warming, tradable permits, and extreme weather.

Each entry is fully cross-referenced, to both definitions of weather- and climate-related terms as well as additional sources for further study. Over 300 photographs, maps, and charts offer highly evocative depictions of various weather and climate conditions around the world and across time.The Encyclopedia is also equipped with historical examples of disasters caused by bad weather, milestones in the development of the atmospheric sciences, and the geological time scale round out this survey, making it a comprehensive and authoritative resource for anyone doing research in this area or working in the field. ... Read more

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Limited Edition of 300 ... Read more