Once you cut an avocado, it’s easier to determine whether it has gone bad. It’s possible that your climate in Kenya is conducive to it whereas our drier climate in California isn’t. Read on for a more in-depth discussion of this chronic disease of avocados. If your avocado tree is affected by Phytophthora cinnamon, it may eventually decline and die. Avocado tree death may take from a few months to several years, depending on soil characteristics, cultural practices and environmental conditions. Those black spots. As much as we all wish that avocado trees could be a plant it, forget it, and harvest affair, caring for your tree requires consistency and vigilance. Small branches die back at top of tree. The leaves have a red pigmentation when they … avocado root rot ‐ Fumigate small spots of disease. Contact a pest control adviser about soil fumigation. If detected early; otherwise, cut off the tree at ground level and fumigate soil. Avocado tree shoots die back from the tips, and eventually the tree is reduced to a bare framework of dying branches. Of course, this is only an option after you buy it. Leaves may turn brown but hang on the branches for months. I'd spread a lot of gypsum around your avocado tree, say 4 handfulls / sq m. Here's what the brown spots, bruises, and stringy black lines on your avocado flesh mean — and whether it's still okay to eat: ( Courtesy Food52.com ) Oxidation What is Avocado Cercospora Spot? Avocado, Persea americana, is an evergreen tree in the family Lauraceae which grown for its nutritious fruit, the avocado.The avocado tree is large and dome shaped with oval or elliptical leaves arranged in a spiral on the tips of branches. An avocado doesn’t start to ripen until picked from the tree, but the process happens rather quickly afterward. Spray the tree once a week for 4 weeks, then once a month 'till it clears up. Cotton Root Rot (fungus – Phymatotrichopsis omnivora) : Although avocado is susceptible to cotton rot root, it is not a common disease. Give your tree a spray of 30g Mancozeb, 4.5 litres water & 30ml of a good wetting agent. Common symptoms of disease include:Leaves: small leaves that are pale green, yellowed, blotched or blackened. The wetting agent is the key. The health of your tree can and often does have a huge The leaves turn brown and remain on the tree. You can prevent this pathogen by planting your avocado tree in well-drained sites. Few leaves or excessive leaf fall. A healthy avocado tree has glossy, dark green leaves, intact bark and plenty of blossoms. Avocado cercospora spot is a common and frustrating fungus that thrives on the tissues of avocado trees. Even strong, healthy trees can fall victim to severe weather, disease, or infestation. Trunk/Bark: Mottled, streaked, cracked or rough bark. A rotten one has brown or black spots throughout the flesh. 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