Abstract
Leaf populations ofTrichoderma were studied on tomato, pepper and geranium plants incubated under various conditions. Treatments involved high (>90%) or lower (75–85%) relative humidity (r.h.), temperatures of 15±3°C or 25±3°C, and soil fertilization with formulations of 2,2,5%, 3,3,8% or 5,3,8% NPK. The size of populations on leaves treated with the fungusTrichoderma harzianum differed according to plant species, leaf age, length of incubation, atmospheric conditions, and plant nutrition.T. harzianum populations were promoted in many cases by high r.h. and by 3,3,8% NPK. Interactions of introduced populations ofBotrytis cinerea with populations ofT. harzianum on tomato leaves under combinations of the above conditions showed that the population ofB. cinerea wasca tenfold lower in the presence ofT. harzianum than in the absence of this fungus.
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Elad, Y., Kirshner, B. Survival in the phylloplane of an introduced biocontrol agent (Trichoderma harzianum) and populations of the plant pathogenBotrytis cinerea as modified by abiotic conditions. Phytoparasitica 21, 303–313 (1993). https://doi.org/10.1007/BF02981048
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DOI: https://doi.org/10.1007/BF02981048