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  • 1
    Electronic Resource
    Electronic Resource
    Allelopathic effects of litter on the growth and colonization of mycorrhizal fungi (1983)
    Springer
    Journal of chemical ecology 9 (1983), S. 1153-1162 
    Details
    ISSN: 1573-1561
    Keywords: Allelopathy ; allelochemicals ; ectomycorrhizal fungi ; reforestation ; Thizopogon vinicolor ; Pisolithus tinctorius ; Laccaris laccata ; Cenococcum geophilum ; Pseudostuga menziesii
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract In laboratory studies, water-soluble extracts of the litter of four shrub and three conifer species had variable effects on the growth of four species of ectomycorrhizal fungi. In general, low concentrations (parts per thousand) stimulated fungal growth; while, high concentrations (parts per hundred and parts per ten) either stimulated growth, inhibited growth, or had no effect, depending on both fungal and litter species. In greenhouse studies, litter applied to the surface of a sand-soil mixture reduced the formation ofRhizopogon sp. on Douglas-fir seedlings. Allelochemicals in the litter may inhibit seedling growth and suppress fungai growth and root colonization in the field, thus explaining the failures of reforestation by conifer species in disturbed sites.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00982218
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Influences of trees on abundance of natural enemies of insect pests: a review (1995)
    Springer
    Agroforestry systems 29 (1995), S. 303-311 
    Details
    ISSN: 1572-9680
    Keywords: arthropods ; birds ; predators ; spiders ; windbreaks
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract In this article we review the use of natural enemies in crop pest management and describe research needed to better meet information needs for practical applications. Endemic natural enemies (predators and parasites) offer a potential but understudied approach to controlling insect pests in agricultural systems. With the current high interest in environmental stewardship, such an approach has special appeal as a method to reduce the need for pesticides while maintaining agricultural profitability. Habitat for sustaining populations of natural enemies occurs primarily at field edges where crops and edge vegetation meet. Conservation and enhancement of natural enemies might include manipulation of plant species and plant arrangement, particularly at these edges; and consideration of optimum field sizes, number of edges, and management practices in and near edges. Blending the benefits of agricultural and forestry (windbreak) systems is one promising approach to field edge management that has additional benefits of wind protection and conservation of desirable wildlife species.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00704876
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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