Chemical Control of Tomato Early Blight Disease

Abstract

lternaria solani (Ellis and Martin) Jones and Grout, the causal of tomato early blight, attacks all tomato hybrids and varieties, either in open field or in greenhouse, causing a serious damage that led to decrease in tomato yield. The fungus A. solani was isolated from tomato leaves and fruits, showing typical symptoms of early blight, collected from different locations distributed in six Egyptian Governorates. Pathological studies cleared that A. solani isolate taken from Menufiya was the most aggressive one; meanwhile, Ismailiya isolate was the lowest one in this concern. Disease control experiments revealed that all the tested fungicides inhibited, to different degrees, the in vitro growth of A. solani and decreased early blight severity under greenhouse conditions. The contact fungicides were more effective than the systematic ones, in controlling tomato early blight. Moreover, mancozeb 64% + metalaxyl 4% and copper hydroxide were the most effective ones, followed by systematic fungicides shirlan and dolphin Alfa.

Morphological and Molecular Characterization of Large-spored Alternaria Species Associated with Potato and Tomato Early Blight in Egypt

“…Several Alternaria spp. have been found infecting potatoes and tomatoes in Egypt, including A. arborescens, A. alternata, A. phragmospora and A. solani (Abada et al 2008;El-Abd-Kareem et al 2009;Ashour et al 2012;El Gobashy et al 2018;Hussein and Voigt 2019;Attia et al 2020). Among these, A. solani is the most prevalent and leading cause of EB and A. alternata is the most prevalent species associated with leaf blight, whereas A. arborescens has been found to be the least prevalent in Egypt (El Gobashy et al 2018;Hussein and Voigt 2019).…”

Efficacy of endophytic bacteria as promising inducers for enhancing the immune responses in tomato plants and managing Rhizoctonia root-rot disease

“…About 4 million hectares of arable land are cultivated to produce tomatoes worldwide, which produces 100 million tons annually valued at between 5 and 6 billion US$ 12 . One of the most significant Solanaceous commodities in Egypt is the tomato, which is grown for both local consumption and exportation 13 . Notably, Egypt ranks among the top 10 tomato-producing countries in the world, producing 6.4 million tons of tomatoes annually on an estimated 181,000 acres 8 , 14 .…”

Antifungal Activity of Curly Parsley Essential Oil and Its Nanoemulsion Against Alternaria solani and Rhizoctonia solani Plant Pathogens

“…(2020), Egypt is considered the fifth country worldwide in tomato production, with 6.8 million MT productivity in 2019, compared to 8.6 million MT productivity in 2012. Tomato Early blight disease is considered the highest causal agent of tomato yield loss and reduced fruit quality (80%) in warm and humid regions caused by Alternaria solani (Ashour et al, 2012 andPandey et al, 2014). Early symptoms are recognized as a brown spot-on leaves, fruits, and stems, it's mode of action is to reduce the photosynthetic surface and cause the leaf lower part to fall (Meenakshi et al, 2014).…”