INTEGRATED DISEASE MANAGEMENT OF EARLY BLIGHT IN TOMATO CAUSED BY Alternaria solani Sorauer
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Date
2016-10
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College of Horticulture, Bharsar Campus, V.C.S.G. Uttarakhand University of Horticulture and Forestry
Abstract
Early blight caused by Alternaria solani Sorauer is an important soil borne and seed borne
disease of tomato. This disease is very destructive disease resulting heavy yield losses. The present
investigation was undertaken to develop suitable management strategy through chemical, bioagents, oils
and animal products with a view to formulate an integrated approach against early blight of tomato
under field condition.
In vitro and in vivo studies of different nine treatments were tested against early blight among
them carbendazim gave minimum radial growth (2.56 mm) followed by captan (3.75 mm) and
Trichoderma harzianum (4.34 mm) similarly same result was found in vivo two foliar spray of
carbendazim (0.2%) was found most effective significantly reduced disease intensity (46.40, 51.10 and
56.97%) respectively after 75, 90, and 105 DAT significantly increased yield (37.22 t/ha) followed by
captan (48.80, 53.80 and 59.40%) disease intensity and increase the yield (32.14 t/ha) and Trichoderma
hazianum (50.13, 54.50 and 60.90%) as increased yield (24.48 t/ha) while maximum disease intensity
(66.40, 69.30 and 76.90%) and lowest yield (4.52 t/ha) was found in mustard oil. Eight treatments
tested with combination in vitro condition and minimum radial growth was found in carbendazim +
captan (2.04 mm) followed by carbendazim + T. harzianum (3.74 mm) and carbendazim + neem oil
(4.31 mm) where as in vivo condition carbendazim + captan was found most effective and reduced
disease intensity (39.97, 47.07and 51.83%) with increased yield 38.92 t/ha) followed by carbendazim +
T. harzianum (48.64, 52.15 and 55.47%) with yield 31.27 t/ha, carbendazim + neem oil (51.45, 54.78
and 57.02%) with 24.97 t/ha respectively.
Hence, it is concluded that the combined Integrated Disease Management package was reduced
the disease intensity and significantly increase the tomato yield.
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