EFFICIENCY OF MEANS TO CONTROL MAJOR DISEASES OF TOMATO IN HUMID SUBTROPICS OF GEORGIA

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Authors

Keywords:

Blights, fungicide, severity, tomato, variety, yield

Abstract

Tomato is one of the most widespread and popular vegetable food crops in the world including Georgia. The average yield of tomatoes in Georgia is very low comparing with other countries and local production, so far, cannot meet the domestic demand. In Georgia, tomato production in open fields is highly constrained by the early blight (Alternaria solani) and late blight diseases (Phytophthora infestans). Key to successfully controlling the most common fungal foliar diseases is an integrated management program where the main component is using resistant varieties and fungicides. This study aimed to determine the effectiveness of biological fungicide and resistant variety to combat tomato late and early blights under field conditions in the humid subtropics in Western Georgia. The research was conducted at the experimental field of the Institute of Phytopathology and Biodiversity in 2020-2021. Tomato varieties, moderately resistant (De-Barao Rozovii) and susceptible (Vardisferi Choportula) to late and early blights, and chemical (Ridomil gold) and bacterial fungicides (Phytosporin M) were research objects. The analysis of variance showed that the effect of fungicides and tomato variety was highly significant for late blight severity and tomato fruit yield. The Ridomil gold was the most effective than biofungicide Phytosporin M as the severity of Phytophthora infestans on susceptible variety was reduced by 41.5% and yield increase was 77.6%. In treatment with Phytosporin M, the disease severity was reduced by 23.2% and yield increase was 40.5%. The severity reduced by 15% and yield increased by 35.3% on moderately resistant variety De Barao.

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Published

2024-06-21

How to Cite

Tsetskhladze, T., Natsarishvili, K., Sikharulidze, K., Aptsiauri, N., & Sikharulidze, Z. (2024). EFFICIENCY OF MEANS TO CONTROL MAJOR DISEASES OF TOMATO IN HUMID SUBTROPICS OF GEORGIA. Journal of Applied Biological Sciences, 18(2), 162–171. Retrieved from https://jabsonline.org/index.php/jabs/article/view/1223

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