What Is Wrong With My Mango Tree?

Are there any orange, rust-colored, dense, silky tufts on both upper and lower surfaces of leaves that turn reddish-purple as they mature?

Are there any small, dark spots on flowers that may coalesce to cover entire panicle; dark, irregular, sunken lesions are present on fruit?

Are there any angular or irregular brown lesions on old leaves, lesions may develop gray centers and dark margins?

Are there any white, silk-like threads at forks of branches that coalesce to form a pink crust during wet conditions?

Are the leaves covered with white powder?

Are there any angular, water-soaked spots on leaves which coalesce and turn black; black lesions on stems crack and exude a gummy substance?

Is the flesh of the fruit brown, soft, and foul-smelling; small maggots may be present?

Are the leaves discolored and distorted, sticky substance coating leaves?

Does the bark have holes, tree look weakened, twigs may be dropping?

Do the leaves and stems have white, cottony clusters on them?

Algal leaf spot is caused by algae Cephaleuros virescens and it's favored by wet, humid conditions. Zoospores can be spread by splashing water. Ensure trees receive adequate fertilization, irrigation and are properly pruned to avoid stress on the plants and promote air circulation through the canopy. Periodic applications of a copper-based fungicide are usually enough to control the disease.

These symptoms indicate a fungal disease - Anthracnose. The primary method of controlling the disease is to plant resistant cultivars. Both systemic and non-systemic fungicides are effective at controlling the disease and are usually applied shortly before flowering and during fruit development.

Phoma blight is a new fungal disease that attacks mangoes. The disease is favored by warm and moist weather. It can be kept under control by spraying copper oxychloride (0.3%) just after the appearance of the first symptoms. Sprays should be repeated at 20-day intervals.

Pink disease is a destructive fungal disease of mango grown in the wet tropics. If the pink disease is identified the recommended treatment is an application of an appropriate fungicide that can be applied by spraying or painting onto infected bark with a paintbrush.

White, powdery patches on the leaves are caused by a fungal disease Powdery mildew. Powdery mildew usually appears in damp places. Encourage good air circulation around the affected plants by thining them and any surrounding plants. Avoid wetting the foliage when watering. Any affected leaves should be cut off and removed. A fungicidal spray may be necessary to protect your plant from further infections.

Bacterial black spot is found in most tropical and subtropical areas where mango is grown. Provide windbreaks for plants. Prune off all infected twigs. Protective sprays of copper during wet weather help to prevent the disease.

The adult fruit flies lay its eggs just under the skin of semi repine fruits. The maggots develop and feed inside the fruit, and fall out of the fruits to pupate in the soil when they mature. Control this pest by destroying all infested berries as soon as you find them. Chemical sprays are most effective when combined with a protein bait to attract the insect.

Discolored and distorted leaves are caused by mango hoppers. These small insects feed by sucking juices from leaves undersides. Insecticidal soap helps with severe infestations.

Mango tree borers are a pest of mango trees in many parts of Asia, Africa, Central America, the Caribbean, and the Solomon Islands. Prune off borer-infested branches. If you see borer holes in your trees, probe into them with a flexible wire or inject a solution of parasitic nematodes. After treatment, seal holes with putty.

White, cottony clusters on leaves and stems are caused by mango mealybugs. These tiny insects are covered with a fluffy white coating. They feed by sucking plants sap. They produce sticky substance honeydew which makes leaves sticky. You can control them by washing them off the plant with water spray. Insecticidal soap should be used with severe infestations.

If the leaves are covered by the sticky substances the culprits are white mango scales. These tiny, shelled insects often feed on the undersides of the leaves, causing an unhealthy appearance. Scrape off minor infestations with your fingernail. Prune out badly infested growth, or use a soft brush and soapy water to gently scrub the scales off the stems. Control scales by spraying insecticidal oil during the growing season.