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  • 1
    Electronic Resource
    Electronic Resource
    Prospects for control of Pythium damping-off of lettuce with Trichoderma, Gliocladium and Enterobacter spp. (1991)
    Springer
    Biology and fertility of soils 12 (1991), S. 95-99 
    Details
    ISSN: 1432-0789
    Keywords: Lettuce ; Damping-off ; Biocontrol ; Trichoderma ; Enterobacter ; Gliocladium
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Damping-off of lettuce (Lactuca sativa) caused by Pythium ultimum was studied in pots containing a non-sterile potting mix in the glasshouse. Fifty P. ultimum sporangia g-1 compost reduced the plant stand to 15% and shoot dry weight to 18%, but this reduction was totally prevented by applying Trichoderma harzianum at 2×105 viable propagules g-1 potting mix. Gliocladium virens and Enterobacter cloacae also alleviated the damping-off. E. cloacae did not adversely affect the action of the fungal antagonists. The co-existence of the bacterial and fungal antagonists was revealed on the root surface and inner surface of the testa by scanning electron microscopy, indicating the compatibility of the biocontrol agents.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00341482
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  • 2
    Electronic Resource
    Electronic Resource
    Effect of peat-bran inoculum ofTrichoderma species on biological control ofRhizoctonia solani in lettuce (1991)
    Springer
    Plant and soil 136 (1991), S. 257-263 
    Details
    ISSN: 1573-5036
    Keywords: Biological control ; Gliocladium ; growth stimulation ; lettuce ; nutrients ; peat-bran inoculum ; Rhizoctonia solani ; Trichoderma
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract A range of known biocontrol or plant growth-stimulating species ofTrichoderma orGliocladium were grown on peat-bran substrate to yield between 5×107−3×1010 colony forming units (cfu's)g−1 substrate after 14 days growth. Inocula were incorporated into peat:sand potting compost infested withRhizoctonia solani to give 7–8 × 104 cfu's of antagonist g−1 compost and assessed for biological control activity using lettuce seedlings. Six of the eight antagonists decreased daming-off and three of these consistently increased yield in comparison withR. solani treatment alone. Subsequently, peat-bran inoculum ofT. harzianum isolate TH1 was incorporated at 0.5% w/v intoR. solani infested potting compost. Both autoclaved and nonautoclaved inoculum ofT. harzianum TH1 decreased disease and increased yield. Incorporation of ethyl acetate-extracted autoclaved inoculum ofT. harzianum TH1 resulted in similar levels of biocontrol and improved plant growth as did incorporation of nonautoclaved and autoclavedT. harzianum TH1 inoculum. The need to standardize inocula and controls is emphasized.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02150057
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    Paper (German National Licenses)
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