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  1. Article: New Hosts of the Parasitic Flowering Plant, Alectra vogelii, in Malawi.

    Subrahmanyam, P

    Plant disease

    2019  Volume 85, Issue 4, Page(s) 442

    Abstract: Alectra vogelii Benth. (Family: Scrophulariaceae) is a vascular hemiparasite of various leguminous crops in Africa, including peanut (Arachis hypogaea), bambara groundnut (Vigna subterranea), cowpea (Vigna unguiculata), common bean (Phaseolus vulgaris), ... ...

    Abstract Alectra vogelii Benth. (Family: Scrophulariaceae) is a vascular hemiparasite of various leguminous crops in Africa, including peanut (Arachis hypogaea), bambara groundnut (Vigna subterranea), cowpea (Vigna unguiculata), common bean (Phaseolus vulgaris), soybean (Glycine max), and mung bean (Vigna radiata) (1). It is a common parasite of peanut in Angola, Burkina Faso, Malawi, Mozambique, Nigeria, Swaziland, Zambia, and Zimbabwe (2). During April and May 2000, A. vogelii was observed parasitizing several wild Arachis species in a field at the Chitedze Agricultural Research Station near Lilongwe, Malawi. These species were part of a germ plasm enhancement program that included A. appressipila (ICRISAT Groundnut Accession number [ICG] 8127), A. batizocoi (ICG 8124), A. benensis (ICG 13215), A. cardenasii (ICG 13164 and 13166), A. correntina (ICG 8918), A. duranensis (ICG 13200), A. helodes (ICG 8955 and 14917), A. hoehnei (ICG 13228), A. magna (ICG 8960), A. pintoi (ICG 13222 and 14914), A. stenosperma (ICG 13172 and 13223), and A. valida (ICG 13230). In addition, A. vogelii was observed on four unidentified Arachis species (ICG 13231, 14875, 14888, and 14907). Parasitized plants were less vigorous and connections between A. vogelii and host plants could be observed by carefully removing the soil in the root zone. Mature A. vogelii plants were 0.3 to 0.5 m and had multiple stems branching at the base. Subsoil plant parts were a deep orange color. Flowers were prominent lemon yellow with horseshoe-shaped stigmata and leaves were light green. This is the first report of A. vogelii parasitizing wild Arachis species. References: (1) C. Parker. Crop Prot. 10:6-22, 1991. (2) P. Subrahmanyam. 1997. Parasitic flowering plants. Pages 70-71 in: Compendium of Peanut Diseases, 2
    Language English
    Publishing date 2019-03-04
    Publishing country United States
    Document type Journal Article
    ZDB-ID 754182-x
    ISSN 0191-2917
    ISSN 0191-2917
    DOI 10.1094/PDIS.2001.85.4.442C
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Bonn / Germany

    Z 2043: Show issues

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  2. Book: Screening methods and sources of resistance to rust and late leaf spot of groundnut

    Subrahmanyam, P.

    (Information bulletin / International Crops Research Institute for the Semi-Arid Tropics ; 47)

    1995  

    Author's details P. Subrahmanyam
    Series title Information bulletin / International Crops Research Institute for the Semi-Arid Tropics ; 47
    Collection
    Language English
    Size IV, 20 S. : Ill.
    Publisher ICRISAT
    Publishing place Patancheru
    Publishing country India
    Document type Book
    Note Zsfassung in franz., span. und portug. Sprache
    HBZ-ID HT013909990
    ISBN 92-9066-319-7 ; 978-92-9066-319-5
    Database Catalogue ZB MED Nutrition, Environment, Agriculture

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    In stock of ZB MED Bonn / Germany

    Shelf markLoan statusLocation
    048/25 available for loan (reading room) Freihandmagazin (U1)

    Order via subito

    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

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  3. Book: Web blotch disease of groundnut

    Subrahmanyam, P.

    (Information bulletin / International Crops Research Institute for the Semi-Arid Tropics ; 43)

    1994  

    Author's details P. Subrahmanyam
    Series title Information bulletin / International Crops Research Institute for the Semi-Arid Tropics ; 43
    Collection
    Keywords Erdnuss ; Pflanzenkrankheit ; Phoma arachidicola
    Subject Krankheitsbefall ; Pflanzen ; Nutzpflanzen ; Arachis hypogaea
    Size 15 S. : z. T. farb. Ill und Kt.
    Publisher ICRISAT u.a.
    Publishing place Patancheru
    Publishing country India
    Document type Book
    Note Zsfassung in franz. und portug. Sprache
    HBZ-ID HT006320507
    ISBN 92-9066-298-0 ; 978-92-9066-298-3
    Database Catalogue ZB MED Nutrition, Environment, Agriculture

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    In stock of ZB MED Bonn / Germany

    Shelf markLoan statusLocation
    948/2061 available for loan (reading room) Freihandmagazin (U1)

    Order via subito

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  4. Book: Field diagnosis of groundnut diseases

    Subrahmanyam, P.

    (Information bulletin / International Crops Research Institute for the Semi-Arid Tropics ; 36)

    1992  

    Author's details P. Subrahmanyam
    Series title Information bulletin / International Crops Research Institute for the Semi-Arid Tropics ; 36
    Collection
    Keywords Erdnuss ; Pflanzenkrankheit ; Diagnose
    Subject Ärztliche Diagnose ; Krankheitsbefall ; Pflanzen ; Nutzpflanzen ; Arachis hypogaea
    Size 79 S. : farb. Ill.
    Publisher ICRISAT, Internat. Crops Research Inst. for the Semi-Arid Tropics
    Publishing place Patancheru
    Publishing country India
    Document type Book
    Note Zsfassung in franz. und span. Sprache
    HBZ-ID HT006146891
    ISBN 92-9066-255-7 ; 978-92-9066-255-6
    Database Catalogue ZB MED Nutrition, Environment, Agriculture

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    In stock of ZB MED Bonn / Germany

    Shelf markLoan statusLocation
    948/183 available for loan (reading room) Freihandmagazin (U1)

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  5. Book: Rust disease of groundnut

    Subrahmanyam, P. / Mcdonald, D.

    (Information bulletin / International Crops Research Institute for the Semi-Arid Tropics ; 13)

    1983  

    Author's details P. Subrahmanyam and D. McDonald
    Series title Information bulletin / International Crops Research Institute for the Semi-Arid Tropics ; 13
    Collection
    Language English
    Size III, 15 S. : Ill., Kt.
    Publisher ICRISAT
    Publishing place Patancheru
    Publishing country India
    Document type Book
    Note Zsfassung in franz. Sprache
    HBZ-ID HT014920913
    Database Catalogue ZB MED Nutrition, Environment, Agriculture

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    In stock of ZB MED Bonn / Germany

    Shelf markLoan statusLocation
    828/597 (13) order for loan Geschlossenes Magazin (U2)

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  6. Book ; Online: Role of neutral wind and storm time electric fields inferred from the storm time ionization distribution at low latitudes

    Subrahmanyam, P. / Jain, A. R. / Singh, L. / Garg, S. C.

    eISSN: 1432-0576

    in-situ measurements by Indian satellite SROSS-C2

    2018  

    Abstract: Recently, there has been a renewal of interest in the study of the effects of solar weather events on the ionization redistribution and irregularity generation. The observed changes at low and equatorial latitudes are rather complex and are noted to be a ...

    Abstract Recently, there has been a renewal of interest in the study of the effects of solar weather events on the ionization redistribution and irregularity generation. The observed changes at low and equatorial latitudes are rather complex and are noted to be a function of location, the time of the storm onset and its intensity, and various other characteristics of the geomagnetic storms triggered by solar weather events. At these latitudes, the effects of geomagnetic storms are basically due to (a) direct penetration of the magnetospheric electric fields to low latitudes, (b) development of disturbance dynamo, (c) changes in atmospheric neutral winds at ionospheric level and (d) changes in neutral composition triggered by the storm time atmospheric heating. In the present study an attempt is made to further understand some of the observed storm time effects in terms of storm time changes in zonal electric fields and meridional neutral winds. For this purpose, observations made by the Retarding Potential Analyzer (RPA) payload on board the Indian satellite SROSS-C2 are examined for four prominent geomagnetic storm events that occurred during the high solar activity period of 1997-2000. Available simultaneous observations, from the GPS satellite network, are also used. The daytime passes of SROSS-C2 have been selected to examine the redistribution of ionization in the equatorial ionization anomaly (EIA) region. In general, EIA is observed to be weakened 12-24 h after the main phase onset (MPO) of the storm. The storm time behaviour inferred by SROSS-C2 and the GPS satellite network during the geomagnetic storm of 13November1998, for which simultaneous observations are available, is found to be consistent. Storm time changes in the delay of received GPS signals are noted to be ~1-3 m, which is a significant component of the total delay observed on a quiet day. An attempt is made to identify and delineate the effects of a) meridional neutral winds, b) the development of the ring currents and c) the disturbance dynamo electric fields on the low latitude ionization distribution. The weakening of the EIA is noted to be primarily due to the decrease in the eastward electric fields driving the equatorial fountain during the daytime. The meridional neutral winds are also noted to play an important role in redistribution of ionization in the EIA region. The present results demonstrate that storm time latitudinal distribution of ionization in this region can be better understood by taking into account the meridional winds in addition to E×B drifts.
    Subject code 551
    Language English
    Publishing date 2018-09-27
    Publishing country de
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  7. Article: Groundnut Rossette: A Virus Disease Affecting Groundnut Production in Sub-Saharan Africa.

    Naidu, R A / Kimmins, F M / Deom, C M / Subrahmanyam, P / Chiyembekeza, A J / van der Merwe, P J A

    Plant disease

    2019  Volume 83, Issue 8, Page(s) 700–709

    Language English
    Publishing date 2019-03-08
    Publishing country United States
    Document type Journal Article
    ZDB-ID 754182-x
    ISSN 0191-2917
    ISSN 0191-2917
    DOI 10.1094/PDIS.1999.83.8.700
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    Kategorien

    In stock of ZB MED Bonn / Germany

    Z 2043: Show issues

    Order via subito

    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

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  8. Article ; Online: New Groundnut Released in Malawi

    Subrahmanyam, P

    2001  

    Abstract: About 18% of Malawi's groundnut area is covered with 1CRISAT/DARTS developed improved varieties. With the recent releases (two in 2000 and one in 2001), and available funds from the ICRISAT/USAID Project for seed multiplication, the area under improved ... ...

    Abstract About 18% of Malawi's groundnut area is covered with 1CRISAT/DARTS developed improved varieties. With the recent releases (two in 2000 and one in 2001), and available funds from the ICRISAT/USAID Project for seed multiplication, the area under improved varieties will further increase. About US$ 0.35 million may be generated for groundnut seed production during 2001 through the revolving fund.
    Keywords Groundnut
    Language English
    Publisher International Crops Research Institute for the Semi-Arid Tropics
    Publishing country in
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    Full text online

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    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

  9. Article ; Online: New Hosts of the Parasitic Flowering Plant, Alectra vogelii, in Malawi

    Subrahmanyam, P

    2001  

    Abstract: Alectra vogelii Benth. (Family: Scrophulariaceae) is a vascular hemiparasite of various leguminous crops in Africa, including peanut (Arachis hypogaea), bambara groundnut (Vigna subterranea), cowpea (Vigna unguiculata), common bean (Phaseolus vulgaris), ... ...

    Abstract Alectra vogelii Benth. (Family: Scrophulariaceae) is a vascular hemiparasite of various leguminous crops in Africa, including peanut (Arachis hypogaea), bambara groundnut (Vigna subterranea), cowpea (Vigna unguiculata), common bean (Phaseolus vulgaris), soybean (Glycine max), and mung bean (Vigna radiata) (1). It is a common parasite of peanut in Angola, Burkina Faso, Malawi, Mozambique, Nigeria, Swaziland, Zambia, and Zimbabwe (2). During April and May 2000, A. vogelii was observed parasitizing several wild Arachis species in a field at the Chitedze Agricultural Research Station near Lilongwe, Malawi. These species were part of a germ plasm enhancement program that included A. appressipila (ICRISAT Groundnut Accession number [ICG] 8127), A. batizocoi (ICG 8124), A. benensis (ICG 13215), A. cardenasii (ICG 13164 and 13166), A. correntina (ICG 8918), A. duranensis (ICG 13200), A. helodes (ICG 8955 and 14917), A. hoehnei (ICG 13228), A. magna (ICG 8960), A. pintoi (ICG 13222 and 14914), A. stenosperma (ICG 13172 and 13223), and A. valida (ICG 13230). In addition, A. vogelii was observed on four unidentified Arachis species (ICG 13231, 14875, 14888, and 14907). Parasitized plants were less vigorous and connections between A. vogelii and host plants could be observed by carefully removing the soil in the root zone. Mature A. vogelii plants were 0.3 to 0.5 m and had multiple stems branching at the base. Subsoil plant parts were a deep orange color. Flowers were prominent lemon yellow with horseshoe-shaped stigmata and leaves were light green. This is the first report of A. vogelii parasitizing wild Arachis species
    Keywords Agriculture-Farming ; Production ; Technology ; Economics
    Language English
    Publisher American Phytopathological Society
    Publishing country in
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    Full text online

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  10. Article ; Online: New Groundnut Released in Malawi

    Subrahmanyam, P

    2001  

    Abstract: About 18% of Malawi's groundnut area is covered with 1CRISAT/DARTS developed improved varieties. With the recent releases (two in 2000 and one in 2001), and available funds from the ICRISAT/USAID Project for seed multiplication, the area under improved ... ...

    Abstract About 18% of Malawi's groundnut area is covered with 1CRISAT/DARTS developed improved varieties. With the recent releases (two in 2000 and one in 2001), and available funds from the ICRISAT/USAID Project for seed multiplication, the area under improved varieties will further increase. About US$ 0.35 million may be generated for groundnut seed production during 2001 through the revolving fund.
    Keywords Groundnut
    Language English
    Publisher International Crops Research Institute for the Semi-Arid Tropics
    Publishing country in
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    Full text online

    More links

    Kategorien

    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

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