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Showing items 1 through 9 of 11.
  1. Library Resource
    Journal Articles & Books
    December, 1980
    Peru, Colombia, Argentina, Mexico, Brazil, Central America, Northern America, South America

    White mold, caused by the fungus Sclerotinia (Whetzelinia) sclerotiorum, is distributed worldwide and has more than 300 hosts. It infects flowers, cotyledons, seeds, leaves or injured plant tissue. The disease can be controlled by crop rotation, flooding, reduced seeding rates, application of chemical products in the middle of the flowering period, modifying plant architecture and the use of resistant var. Many soil microorganisms are associated with sclerotia and may cause them to degrade or fan to germinate. The symptoms and damage caused by the disease are illustrated in color.

  2. Library Resource
    Journal Articles & Books
    December, 1980
    Colombia, Central America, South America

    Efforts to develop cassava technology for the vast areas of acid infertile soils were continued Large-scale germplasm screening in the field was begun in Carimagua for tolerance to low levels of P and acidity and in Quilichao, for tolerance to low levels of P. Various fertilizer trials were used to determine: (a) nutrient absorption and distribution within the plant during a 12-mo.

  3. Library Resource
    Journal Articles & Books
    December, 1980
    Colombia, Central America, South America

    Research of the physiology section was centered on identifying the characters associated with high root yields and quality in cassava under stress conditions. Plant reaction to water stress was studied, specifically regarding growth and yields of var. M Mex 59 and M Col 22 with a period of artificial rain exclusion. Observations were made throughout the stress period and subsequent recovery. Water stress reduced LAI notably although M Mex 59 maintained a LAI approx. twice that of M Col 22 during the stress period. LAI for both var.

  4. Library Resource
    Journal Articles & Books
    December, 1980
    Colombia, Central America, South America

    The progress achieved by CIAT's cassava program through training activities related to the crop in Latin America, Asia, and Oceania are given. In collaboration with the training office at the Centro Internacional de Agricultura Tropical, the cassava program in 1980 trained 38 professionals from 15 countries (Brazil, Colombia, Mexico, Bolivia, USA, Thailand, Dominican Republic, S. Africa, Ecuador, Haiti, Honduras, W. Germany, the Netherlands, Great Britain, and Italy).

  5. Library Resource
    Journal Articles & Books
    December, 1980
    Venezuela, Brazil, Central America, South America

    Different nutritional deficiencies or toxicities may limit bean development and yield. N and P deficiencies are the most frequent, although deficiency of minor elements and Al/Mn toxicity can reduce yields considerably. Nutritional problems are usually diagnosed by soil and plant tissue analyses and the observation of symptoms produced by nutritional disorders. Optimum pH for bean production varies between 6.5-7.5; within these limits, the majority of the plant nutrients have their max availability. Color illustrations are given of the symptoms of plant deficiencies and toxicities.

  6. Library Resource
    Conference Papers & Reports
    December, 1980
    Peru, Colombia, Bolivia, Venezuela, Ecuador, Central America, South America

    Data are given of area planted to beans, production, and yields in the Andean countries during 1964-66, 1974-76, and 1978; production, trade, and consumption during 1963-65 and 1973-75; and production, area, and yield growth rates during 1966-76. Constraints for bean productivity, cropping systems, and the main bean types consumed in the Andean countries are indicated. Finally, the potential of this crop is analyzed and data of land use and population patterns in the Andean countries are included. (CIAT)

  7. Library Resource
    Journal Articles & Books
    December, 1980
    Uganda, Philippines, Asia

    Revista internacional de silvicultura e industrias forestales

  8. Library Resource
    Journal Articles & Books
    December, 1980

    Revista internacional de silvicultura e industrias forestales

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