If you have had chronic problems with bacterial blight, you may want to use a combination of copper and mancozeb-containing fungicides for control. Apply fungicides two to three times at seven to 10 day intervals as leaves emerge, but before symptoms develop.
Treating Blight
If blight has already spread to more than just a few plant leaves, apply Daconil® Fungicide Ready-To-Use, which kills fungal spores and keeps blight from causing further damage.
Chemical methods
Spray Streptomycin sulphate + Tetracycline combination 300 g + Copper oxychloride 1.25kg/ha. If necessary repeat 15 days later. Application of bleaching powder @ 5 kg/ha in the irrigation water is recommended in the kresek stage.
Symptoms and Signs
Leaf spots are usually angular in shape and bordered by the veins in the leaf. Leaf petioles can also develop such spots. Merging of numerous leaf spots results in the infection of large portions of the foliage; such symptoms are called blights.
Bacterial blight infections start as small, angular-shaped, water-soaked specks on leaves that are often surrounded by yellow borders. As the disease develops, specks enlarge and coalesce together into larger, irregularly shaped gray-to-tan spots.
Chemical Control
Seed treatment with authorized antibiotics and seed dressing with copper oxychloride are very effective against the bacteria causing cotton bacterial blight.
Earth's Ally Disease Control is a new generation of disease control formulated from food-grade citric acid. The formula effectively controls powdery mildew, downy mildew, blight, canker, black spot and leaf spot while leaving no harmful residue on plants.
The bacterial blight incitant was initially named as Pseudomonas malvacearum by Smith (1901), who later referred to it as Bacterium malvacearum (Smith, 1920). Thereafter Dowson (1939) named it as Xanthomonas malvacearum and Dye et al. (1980) proposed the name Xanthomonas campestris pv.
Never apply copper fungicide on very hot days. Never mix copper fungicides with other chemicals. Never over-apply fungicides. Note: Contact your local cooperative extension office to learn specific information on copper fungicide uses in your particular situation.
There are two widespread bacterial blights that affect most types of beans, common blight (Xanthomonas campestris pv phaseoli) and halo blight (Pseudomonas syringae pathovar phaseolicola). The stems, leaves and fruits of bean plants can be infected by either disease.
The fungus spends the winter in infected plant debris in or on the soil where it can survive at least one and perhaps several years. It can also be seed-borne. New spores are produced the following season. The spores are transported by water, wind, insects, other animals including man, and machinery.
Most blights are caused by bacterial or fungal infestations, which usually attack the shoots and other young, rapidly growing tissues of a plant.
You may still get edible fruit from a plant that has blight, just make sure any fruit you eat has no signs of the disease. However, an infected plant will not fully recover.
Avoid overhead watering that may keep leaves wet. If you have had chronic problems with bacterial blight, you may want to use a combination of copper and mancozeb-containing fungicides for control. Apply fungicides two to three times at seven to 10 day intervals as leaves emerge, but before symptoms develop.
(i) Copper oxychloride @ 3 g/l or copper hydroxide @ 2 g/l or 1% Bordeaux mixture (freshly prepared) will check both bacterial and fungal diseases. Still if any fungal disease is observed then one or two sprays of mancozeb or any other fungicide can be taken.
Symptoms of common bacterial blight first appear on leaves as small, water-soaked spots, light green areas, or both. As these spots enlarge, the tissue in the center dies and turns brown. These irregularly shaped spots are bordered by a lemon yellow ring, which serves as a diagnostic symptom of common bacterial blight.
Baking Soda Treatment for Early Blight, Late Blight & Powdery Mildew. Baking soda works by creating an alkaline environment on the leaf, and fungi cannot colonize the surface of the leaf since they need a neutral pH (around 7.0) to survive and thrive.
Peroxide spray will help keep tomato blight at bay. Take 8 -12 tablespoons of hydrogen peroxide and mix it with one gallon of water in the spray container. Start the mixture with 8 tablespoons and do a test spray and watch how your tomato plants react. Wait 24 hours and check your plants again.
In hot weather, halo blight will resemble bacterial brown spot. Both diseases are carried on the seed and can be spread from plant to plant by rain, hail, irrigation, or wind.
Infinito gives you control of all stages of the blight life cycle, as well as providing long-lasting control of foliar and tuber blight in order to maximise yields in your potato crop.