This mixture should be sprayed with a spray bottle over entire tomato plants. To use this remedy, mix 1 tbsp of baking soda with one quart of warm water and add 2 ½ tbsp of vegetable oil or liquid dish soap. The following home remedies can be used to tackle tomato blight:īaking soda: It has fungicidal properties, thus, help stop spreading of fungus in early and late blight. Blight usually begins at the base of plant and make its way to the top of the plant, thus, affecting the harvest.Discolorations in the form of concentric circles shows tomato blight.Black or brown spots in the lower leaves of the plant.You will observe the following symptoms in tomato plants in case of its blight: These lesions soon develops into concentric circles of chocolate brown color. Common symptoms of late blight include leaf lesions in olive green to black in color and appear oily, producing fuzzy spores. Late blight of tomato is caused by a fungus Phytophthora infestans and it thrives in cool and wet conditions. Some common symptoms of early blight of tomato include crown rot, damping off, fruit rot and leaf blight. This fungus will remain in the soil and infect the plants. One form of blight is early blight of tomato blight which is caused by a fungus Alternaria solani. Tomato blight is a disease that affect leaves, stems and even fruits of a tomato plant. There are some home remedies which can cure such diseases in tomato plant and can produce beautiful and healthy berry vines. The vibrant red fruits of a tomato plant are enjoyed by many kinds of insects, pests and other microorganisms like fungus. The most common fungicides that are used for control of early blight include Mancozeb, Maneb, Chlorothalonil, difenoconazole and copper oxychloride.A tomato plant is a beautiful addition to the home garden as it is quite easy to grow, but its beauty can get affected due to many problems. Preventative spray – if weather conditions favor early blight, a preventative spray program is recommended, starting after transplant at 7 to 10-day interval.Ĭontrol spray program – a variety of fungicides are effective for control of early blight. (Jimsonweed), Solanum carolinense (horse nettle) and Solanum ptycanthum (black nightshade). Remove solanaceous weeds that might be alternative hosts for Alternaria.Destroy diseased plants immediately after harvest.Digital tools, that are available today, can help in predicting the conditions to the disease development and in identifying early blight correctly.Therefore, knowing the initial symptoms and preforming regular scouting of the plants is essential. Early detection of early blight is important to reduce the severity of the disease and allows to take additional measures before the disease spreads.Select resistant varieties that are less susceptible to early blight.Use drip irrigation instead of overhead irrigation helps in keeping the foliage dry.Since early blight is a soilborne disease, crop rotation can help in reducing the pathogen level. Use 3-4 years crop rotation with non-solanaceous crops.Infected fruits show dark lesions with concentric rings. ![]() Symptoms appear on the fruit, near the stem. On seedlings, symptoms appear just above the soil line.įruit – Symptoms may appear on ripen or immature fruit. Stem – Symptoms on stems appear as brown lesions with dark concentric rings. Defoliation might result in 30-50% yield loss. Heavy defoliation of lower leaves may occur. ![]() Symptoms spread throughout the plant and affect upper leaves, stem and fruit. Concentric, target-like circles develop inside the spots and they become surrounded by a yellow halo. At first spots are small, but as the disease progresses, they enlarge and reach a size of 1.5cm. Leaves – first symptoms appear on lower leaves as brown irregular or round spots. The disease more severe when tomato plants are stressed by lack of water, nutrients or pests. It spreads with water splashes from soil, running water, wind, tools and machinery. The pathogen, Alternaria fungi, can overwinter in soil and in plant debris. ![]() Conidia (spores of the fungus) germinate in the presence of a film of water over tomato leaves. It may occur at any time during the growth cycle of the tomato crop. The disease favors warm temperatures of 24-29 C and high humidity. It is caused by the fungi Alternaria solani or Alternaria tomatophila. Early blight is a common tomato disease, which can result in significant economic losses.
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