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If the white outer growth is removed or disturbed, the disease appears as purple-brown blotches on older leaves and fruit. [2] [12] Infection may also cause distortion of young leaves, as the infection usually begins on the underside of the leaf. [12] Necrotic lesions appear on the upper side of the leaf, and the leaves tend to curl downward. [7]
Mango malformation Fusarium subglutinans (Note: some debate remains as to complete etiology of this disease.) Mucor rot Mucor circinelloides. Mushroom root rot Armillaria tabescens. Phoma blight Phoma glomerata. Phyllosticta leaf spot Phyllosticta mortonii Phyllosticta citricarpa Guignardia citricarpa [teleomorph] Phyllosticta anacardiacearum
Elsinoë mangiferae produces symptoms superficially similar to anthracnose infections, which are also common on mango. The disease initially presents as small dark brown or gray spots on the underside of leaves or fruit. These spots enlarge and darken over time, developing a velvety or cracked texture in the center of the lesion. [2]
Powdery mildew is one of the easier plant diseases to identify, as the signs of the causal pathogen are quite distinctive. Infected plants display white powdery spots on the leaves and stems. [1] This mycelial layer may quickly spread to cover all of the leaves.
Leaf spots can vary in size, shape, and color depending on the age and type of the cause or pathogen. Plants, shrubs and trees are weakened by the spots on the leaves as they reduce available foliar space for photosynthesis. Other forms of leaf spot diseases include leaf rust, downy mildew and blights. [4]
5. Low Humidity. Light brown spots scattered across fiddle leaf fig leaves can be caused by dry air. If the brown spots in question have a pox-like look instead of being in a single area of the ...
Fusarium mangiferae is one of the causal agents of malformation disease that affects mango (Mangifera indica, L.) growing regions and is economically important. [3] [4] [5] It causes mango malformation disease (MMD) and induces vegetative development abnormalities in shoots that leads to misshaped buds, short internodes, dwarf and narrow leaves.
Sooty mold is commonly seen on the leaves of ornamental plants such as azaleas, gardenias, camellias, crepe myrtles, Mangifera and laurels. Karuka is affected by sooty mold caused by Meliola juttingii. [6] Plants located under pecan or hickory trees are particularly susceptible to sooty mold, because honeydew-secreting insects often inhabit ...