Synergistic effects of Trichoshield on enhancement of growth and resistance to downy mildew in pearl millet

Trichoshield, a talc formulation consisting of spores of Trichodermaharzianum, Trichodermalignorum, Gliocladiumvirens and Bacillussubtilis was tested, following different application methods, for its ability to promote growth of pearl millet plants and to induce resistance to downy mildew of pearl m...

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Bibliographic Details
Published in:BioControl (Dordrecht, Netherlands) Netherlands), 2005-06, Vol.50 (3), p.493-509
Main Authors: Raj, S. Niranjan, Shetty, N. P., Shetty, H. S.
Format: Article
Language:English
Subjects:
Airborne microorganisms
Bacillus subtilis
Biological control
Cadmium
Crop diseases
Downy mildew
Flowering
Flowers & plants
Fungicides
Germination
Gliocladium virens
Greenhouses
Leaf area
Metalaxyl
Millet
Parameters
Pennisetum glaucum
Seed germination
Seed treatments
Seedlings
Seeds
Slurries
Spores
Synergistic effect
Talc
Tillers
Vegetables
Vigor
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Summary:Trichoshield, a talc formulation consisting of spores of Trichodermaharzianum, Trichodermalignorum, Gliocladiumvirens and Bacillussubtilis was tested, following different application methods, for its ability to promote growth of pearl millet plants and to induce resistance to downy mildew of pearl millet. Under laboratory conditions, trichoshield seed treatment enhanced seed germination and seedling vigor of pearl millet significantly over the control; under greenhouse conditions vegetative growth parameters like height, fresh and dry weight, leaf area and number of tillers were significantly enhanced over the control: Trichoshield formulation offered greater protection against downy mildew in comparison with individual strains of T. harzianum, T. lignorum, G. virensand B. subtilis. Among the methods of application, foliar spray was found to be a more efficient delivery method than seed treatment or slurry treatment. Combinations of foliar spray with seed treatment and slurry treatment produced the same effect as foliar spray alone. Under field conditions, trichoshield treatment enhanced reproductive parameters like number of earheads, length and girth of earheads, 1000 seed weight and yield significantly over the control. Days required for 50% flowering was reduced by 4 days compared to the control. Yield enhancement of 28% over the control was highly significant. Trichoshield treatment offered protection ranging from 52 to 71% under field conditions, depending on the application method. However, the chemical fungicide metalaxyl Apron provided the highest protection against downy mildew, both under greenhouse and field conditions.
ISSN:1386-6141
1573-8248
DOI:10.1007/s10526-004-0460-x