Uniform application for protection of a tomato from root rots in an open ground of the middle Russia region

Abstract

Relevance. Significant harm to the culture of tomato, speaking about the middle Russia open ground plantations, is caused by fungal diseases, among which the most common are Fusarium wilt, late blight, alternariosis. To reduce the harmfulness of diseases, it is important to create stable and precocious hybrids that can give most of the crop before the mass development of diseases occurs. The complex system of protection includes preventive measures, the use of growth regulators possessing protective and stimulating action, application of biological preparations and fungicidal treatment. In terms of epiphytotic diseases, the most effective are chemicals, among which the increasing use get multipurpose products, involving several antifungal ingredients.Methods. The article presents the test results of the Uniform fungicide (321,7 g/l Аsoxystrobin + 123,7 g/l to Мefenoxam) against root rot of open ground tomato culture, grown in Moscow region. The estimation of biological and economic efficiency of Uniform application depending on the rate of consumption and multiplicity of treatments was carried out. The tomato Donskoy F1 hybrid, grown on drip irrigation, was used in experiments. Threefold background mode treatment of plants against late blight was carried out by fungicide Revus Top: at the onset of the first symptoms of the disease and hereinafter with 14 days intervals. Flow rate was 0.5 l/ha with solution consumption reaching 200 l/ha. Treatment of tomato plants by Uniform fungicide was performed by watering at the root under the flow rates of 0.9 l/ha and 1.5 l/ha and solution consumption of 200 l/ha. First application of seedlings was performed when planting, the second – 20 days after the first. The area of experimental plots was 20 m2, area of account plots was 10 m2. The repetition of account monitoring was fourfold.Results. The best results were achieved when using Uniform at the rate of 1.5 l/ha by root watering during transplanting and repeatedly at 20 days intervals. An increase in survival rate of seedlings, reduction of incidence of root rot by 81.2-86.9% and tomato yield increase by 29.7% to control under the influence of Uniform treatments were observed.