Alternative disease control strategies - chemical and biological control, plant growth promoting and/or systemic acquired resistance compounds.
Serfontein J. J., Swart S. H., Kalinowski J.
Author Affiliation: QMS Agri Science, PO Box 416, Letsitele 0885, South Africa.
Research Journal - South African Mango Growers' Association 24 : 50-54
Abstract : Due to positive results obtained in the 2002/03 season with the reduction of copper applications and utilization of alternative products, the trial was repeated, adapted and extended. The trial was conducted in both organic and chemical orchards of 'Kent' mango at Bavaria Estates, Hoedspruit, South Africa. The biological products Trykocide (Trichoderma harzianum at 106 spores/ml + Azospirillum brasilense at 109 cfu/ml) and EM (effective microorganisms) showed some suppression of postharvest decay in the organic orchard. The low disease incidence in the chemical orchard impeded conclusions but no disease was present in the copper-treated blocks. Soil applications of phosphorous acid reduced the incidence of stem-end rot (Botryosphaeria spp., formerly known as Nattrassia mangiferae) and bacterial black spot (Xanthomonas campestris pv. mangiferaeindicae). Foliar applications with phosphorous acid gave inconsistent results with either lower or higher disease appearance.