Benlate (Greenlight Systemic Fungicide) should also be added every second spray application to prevent Septoria leaf spot. The copper fungicides also are affective against the foliage and fruit-infecting bacterial pathogens. Chlorothalonil (Ortho Multipurpose Fungicide or Fertilome Broad Spectrum Fungicide) and mancozeb hydroxide (Kocide 101) are fungicides used on tomatoes for early blight. Applications should begin when the first fruit is slightly larger than a quarter. To control the fungus, foliage applications of a fungicide must be made every 7 days until moist conditions (dew included!) no longer exist. Leaf spot development is most severe during periods of cloudy days and high humidity. the leaves must be wet for 12 hours for infection, but at temperatures above 59 degrees F., the length of time for infection is only 3 hours. Leaves must be wet for infection to occur. Spores from the fungus are spread to the lower foliage by wind and splashing rain. It normally develops into a problem when plants have a heavy fruit set and the area has received rainfall. Early blight is an annual problem for most gardeners.
This is the result of a fungus infecting the foliage causing a disease known as early blight. Tomato plants are developing brown spots on the lower foliage. You and everybody growing tomatoes are having the same problem. What should I do will this kill my plants?Ī. Now the leaves are beginning to turn yellow, then brown, then die from the bottom of the plant. I planted the tomato varieties which you recommended and they are loaded with tomatoes. Tomato, Part II Tomato, Part II (Questions 42 - )Ĥ2.
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