Root-knot nematode

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  • Essay On Nematicidal Effects Of Plant Extracts

    1333 Words  | 6 Pages

    The nematicidal effect of aqueous extracts of plant viz., P. hysterophorus, C. citrates, E. crassipes, M. deliciosa and T. cardifolia showed in Table (3) against the juvenile penetration in the roots of brinjal seedlings. The minimum penetration of second stage juvenile of M. incognita observed by P. hysterophorus 38, 33, 29 followed by C. citrates 43, 40, 36, E. crassipes 46, 43, 38 and M. deliciosa 49, 47, 42 after 3 days at the doses of 5g, 10g and 15g. While maximum penetration of second stage

  • Plant Parasitic Nematodes Are Important Factors Affecting Crop Yield

    1135 Words  | 5 Pages

    parasitic nematodes are important factors affecting crop yield in all agricultural production zone, they cause global losses to crop plants with an estimated loss of ≥100 billion US$ per year Chitwood, 2003. They have been identified as one of the major pests affecting vegetables production throughout the world, particularly, in the tropical and sub-tropical regions. More than 60 different species representing 19 genera of plant parasitic nematodes attack vegetables but the most destructive nematode is

  • Irish Famine Essay

    1498 Words  | 6 Pages

    Irish Famine (1845–1849), and still remains the most destructive pathogen of solanaceous crops, including tomato and potato. The soya bean root and stem rot agent, Phytophthora sojae (Anon., 2016e). e) Macrophomina: It has a very wide host distribution covering most of the tropics and subtropics, extending well into temperate zones (Songa 1995). f) Fusarium: The fungal pathogen Fusarium oxysporum cause disease to a wide variety of hosts of any age. Tomato, tobacco, legumes, cucurbits, sweet potatoes

  • The, The Marvel Of Evolution

    1419 Words  | 6 Pages

    Nematodes, the marvel of evolution possess incredible ability to survive extreme weather events and hostile environments with a simple body organization. Genome sequences of model nematodes have revealed that many genes and physiological processes in these worms are common to humans, higher animals and plants. Understanding the molecular mechanisms underlying their survival under adverse environments may provide new opportunities in developing novel strategies to minimize/mitigate the impact of global

  • Climate Change Of The New Nematode Diseases And Changing The Distribution Of Existing Ones

    1595 Words  | 7 Pages

    concern over the role of climate change in promoting the emergence of new nematode diseases and in changing the distribution of existing ones. As the global warming increases, pests and diseases from low latitude regions, where they are much more prevalent may be introduced at higher latitudes. Recent developments in experimental and modeling techniques facilitate climate change impact assessment on nematode diseases. Pine wood nematode, bBursaphelenchus xylophilus, severity increases due to increase in

  • Devastation Phylloxea

    1081 Words  | 5 Pages

    outbreaks have occurred in previously “free zones” (Yarra Valley 2013). An American aphid, Phylloxera vastatrix, was inadvertently introduced to Europe around 1860 with devastating results to vineyards. Breeding rapidly, a multitude of offspring feed on roots weakening and eventually killing grapevines. Leo Lalimand is credited with the successful solution of grafting

  • Pest Control

    3866 Words  | 16 Pages

    Substantial Content I. Importance of natural method of pest control The problem with broad range conventional pesticides is that they not only kill the bad bugs, but they rub out the good bugs, too. A garden without natural predators means a world of insects gone wild. There's nothing left to keep pest levels in check. In fact, chemicals can mean double trouble because although you wipe out the first wave of pests, the second wave which is not the usual pest, but another insect moving into the

  • Agricultural Science and Resource Management in the Tropics and Subtropics

    17383 Words  | 70 Pages

    Tropical Crops Agricultural Science and Resource Management in the Tropics and Subtropics ARTS FIELD AND VEGETABLE CROPS PTS 130 Participants Prof. Dr Marc Janssens Prof. Dr. Jürgen Pohlan Abrefa Danquah Jones Alfonso Cabrera Keshav Prasad Dahal Dilys Sekafor Kpongor Alex Pacheco Bastas Eduardo Molina Gayosso Alexander R. Mendonza Marina Piatto Said Wali Dadshani Nazli Burcu Ökten Wintersemester 2002/03 Bonn . Germany 2 Summary Author/Subject Page Table

  • West African Senior School Certificate Examination Agricultural Science

    4166 Words  | 17 Pages

    WEST AFRICAN SENIOR SCHOOL CERTIFICATE EXAMINATION AGRICULTURAL SCIENCE (For candidates in The Gambia, Nigeria and Sierra-Leone only) PREAMBLE This syllabus has been designed to portray Agricultural Science as an applied science with emphasis on the acquisition of knowledge and skills associated with the content. A general review of the Junior Secondary School Agricultural Science Syllabus is presumed. Candidates will be expected to answer questions on all the topics set out in the column headed

  • Hemp Cultivation in China

    42289 Words  | 170 Pages

    International Hemp Association Hemp (Cannabis sativa L.) Cultivation in the Tai 'an District of Shandong Province, Peoples Republic of China Robert C. Clarke Naturetex International B.V. Van Diemenstraat 192 1013 CP Amsterdam The Netherlands Clarke, R.C. 1995. Hemp (Cannabis sativa L.) Cultivation in the Tai 'an District of Shandong Province, Peoples Republic of China. Journal of the International Hemp Association 2(2): 57, 60-65. This paper summarizes the history of hemp (Cannabis sativa L.) cultivation