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  • 1995-1999  (2)
  • 1985-1989
  • 1980-1984  (2)
  • 1996  (2)
  • 1983  (2)
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  • 1995-1999  (2)
  • 1985-1989
  • 1980-1984  (2)
Year
  • 1
    Electronic Resource
    Electronic Resource
    Oxford, U.K. and Cambridge, USA : Blackwell Science Ltd
    Plant pathology 45 (1996), S. 0 
    ISSN: 1365-3059
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Infection estimates determined by a predictive model developed by Dodd et al. (1991b) were used to time fungicide sprays to control anthracnose disease of mango in the Philippines. For an amount of disease on fruits after harvest which was acceptable to growers, this approach resulted in the application of five fewer sprays compared with a standard spray programme used by the growers in a field trial conducted in 1991–1992. The model predicted only two high anthracnose-risk periods (〉40% of conidia forming appressoria) throughout the duration of the growing period. Rainfall intensity and its time of occurrence during fruit development was found to greatly influence the amount of anthracnose and stem-end rot disease on fruits after harvest. Three relatively strong precipitations (〉20 mm) within a month before harvest resulted in relatively high anthracnose infection of fruits after harvest. At a second field trial, rainfall periods during fruit development did not exceed 4 mm and resulted in virtually disease-free fruits after harvest, including those not treated with fungicide. Again the use of the predictive model resulted in the elimination of five fungicide treatments compared with the standard programme. The amount of rainfall and the time of its occurrence should be considered when planning a disease management scheme for the control of anthracnose on mango fruit.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Mycorrhiza 6 (1996), S. 275-278 
    ISSN: 1432-1890
    Keywords: Key words Arbuscular mycorrhiza ; Glomales ; BEG ; Expert System ; CD-ROM
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  Knowledge of the biodiversity of arbuscular mycorrhizal fungi is limited and keys for their identification are not in a user-friendly format for the non-expert. An Expert System, linked to the BEG (La Banque Européenne des Glomales), has been developed on a CD-ROM to produce a multimedia identification system for these fungi.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1573-5036
    Keywords: Atmosphere ; Selenium ; Sulfur ; Sulfur dioxide
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary A native northern mixed prairie, Montana, U.S.A., was exposed to three controlled levels of sulfur dioxide and subplots fertilized with sulfur and/or selenium. Plant species that accumulated relatively greater quantities of soil sulfur did not necessarily accumulate relatively greater quantities of atmospheric sulfur, andvisa versa. Plant-sulfur concentrations increased with increasing time and level of exposure, but the rate of increase in plant-sulfur concentrations decreased with increasing SO2 concentration. Plants exposed to the high-SO2 concentration tended to have lower sulfur concentrations when growing in the sulfur-or the selenium-fertilized plots. High soil selenium caused a reduction in plant-sulfur content, but a decrease in plant selenium concentration with high soil sulfur could be detected only when comparing plants on the selenium and sulfur plus selenium plots, where high plant selenium concentrations were encountered.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1573-2932
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract A study of the effects of low-level SO2 exposure on decomposition ofAgropyron smithii was conducted. Finely groundA. smithii litter was exposed to 220 μg m−3 SO2 continuously for five weeks. Respiration and total decomposition were measured. Sulfur dioxide exposure resulted in a 90 % reduction in decomposition rate during the initial phase of exposure and a 17% reduction during the latter phase. Differences in respiration rate were not observed. The reductions in decomposition corresponded to a previous report of reduction in the decomposition ofA. smithii and lowered soil pH with SO2 exposure in a field experiment (Dodd and Lauenroth, 1981).
    Type of Medium: Electronic Resource
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