This keeps moisture levels down in cooler temperatures. Leaves play an important role for the quality of the tomatoes and the live of the plant itself. Here is the recommended fungicide that works great to kill bacteria and fungus- Serenade Garden … Even indoors, a variety of fungal organisms can affect your plants, ranging from common problems like anthracnose to opportunistic infections that attack weakened plants. Basil, Ocimum basilicum, is a short lived annual or perennial plant in the family Lamiaceae grown for its leaves which are used as a herb.The basil plant grows from a thick taproot and has silky green opposite (paired) oval leaves which grow to be 3–11 cm (1.2–4.3 in) long and 1–6 cm (0.4–2.4 in), branching out from the central stem. The mint plant is a popular aromatic herb native to Europe and Asia. Early on, downy leaf spot presents itself as small (about 1/8 to 1/4 inch)(3 to 6 mm. The basil plant (Ocimum basilicum) is a cousin to mint plants. Colonies of tiny insects or even individual insects on basil leaves give them a spotty white appearance. If you could turn the leaf over, look for slight bumps. This fungus grows in the soil and can be transmitted through infected leaves. Never harvest your basil … Brown spots and speckling on leaves may be due to incorrect pH and the lack, or overdose, of specific nutrients. Posted: August 6, 2016, Learn more about your crops in our library, Learn about ways to keep your crops healthy. Whiteflies also cause black sooty mold and the leaves to turn yellow and dry. Mint plants are perennials that often reach heights of up to 3 feet. Unfortunately, basil plants are often attacked by pests like the whitefly, which can be found under leaves, sucking out plant juices until the leaves yellow and dry out. Water the plants well from under the foliage, then apply a spray of 1 tablespoon baking soda, 1/2 teaspoon liquid soap and 1 gallon of water. One of the basil plants was basically dead while the other seems to be fine. Whitefly traps come on a stake that you can easily press down into the soil next to your basil plant. Spots From Fungal Infections. While basil plants like mulch to help retain the moisture they enjoy, it is also a conduit for the slugs. Destroy infected plants and avoid planting in that area for 3 years. When powdery mildew arrives on garden sage, what can be done? Protect Basil plants by covering with a transparent white covering. Also, try to water the roots of your basil plants as directly as possible. You should upload more pictures. Bodine is passionate about gardening, travel, education and finance. Indeed, if the black spots are the feces, then the leaf miners have eaten your leaf in some spots. Slugs find the basil plant leaves almost as delicious as you do. It is commonly used to create sauces and add flavoring to various Italian and Thai dishes. Using this powdery mildew control indoors is safe and non-toxic and effective on some, but not all, species of plants. 2. Sweet basil is most susceptible to fusarium wilt, which causes stunted plants, wilted yellow leaves, twisted stems, brown spots and streaks on the stems, and the leaves to drop. Residual salts in the soil from excess fertilizer can affect roots and lead to spotting symptoms. Wet leaves encourage leaf spots and mildews to spread. Leaf spot diseases cause small spots to form on basil leaves. © Copyright 2020 Hearst Communications, Inc. Do not compost the plant or try to remove only the visibly affected leaves. As one of my other herbs which are growing in the morning if possible and try to. Encourage leaf spots and speckling on leaves and stems heavy powdery mildew is a relatively basil! 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