Journal of Plant Pathology Archive

Abstract:

The impact of incorporation of onion, broccoli or carrot crop residues, followed by soil solarization and by incorporation of chicken manure-Trichoderma harzianum (Ch-T) at garlic planting, on sclerotium density and viability of Sclerotium cepivorum, white rot incidence and garlic yield was evaluated in the field in a 3 x 3 x 2 factorial arrangement. Planting and incorporation of broccoli significantly reduced sclerotium density and viability (53 and 14%, respectively) and increased the yield of garlic (18%) compared with incorporation of onion (control). Soil solarization significantly reduced inoculum density (75%), viability (84%) and disease incidence (88%), and increased garlic yield by up to 152%, compared with non-solarized treatments. Incorporation of broccoli in combination with soil solarization was the strategy, which gave the greatest reduction in sclerotium density and viability, the lowest white rot incidence, and the highest yield of garlic.