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Home > Plant Diseases > Diseases of Fruits
Diseases of Fruits
Name of fruit Damage Control
Apple bitter pit Dark spots and brown areas in flesh No remedy known. Do not pick too early
Apple brown rot Fruit turns brown and develops white pustules Prune away dead spurs and shoots. Bury deeply all rotten fruits. Control coddling moth and store with care.
Grape Mildew Powdery white deposit on leaves and berries. Spray with karathane and ventilate to avoid excess humidity.
Cherry Blossom Wilt Browning of flower trusses and leaves on spurs. Remove affected spurs. Spray with Bordeaux mixture
Avocado Black circular spots up to one-half inch appear on fruit. The center of the spots may be slightly sunken and spots may develop cracks. During moist periods, the spots produce pinkish, moist masses of fungal spores. As the fruit ripens, the infection sprea Fungicides can control the disease and should be applied at bud swell.
Avocado Cotton Root Rot It is characterized by a sudden wilt of the tree. The leaves turn brown and remain on the tree. Very young trees tend to become diseased, rather than old ones.
Blueberry Stem Canker - Like stem blight, stem canker eventually causes branch dieback. Prune out affected wood. Fungicides are not effective.
Citrus Green Mold- fungus causes a rapid breakdown of fruit punctured or bruised during harvesting and packing operations. The fungus enters the fruit only through wounds. A white mold that later turns green is seen growing on the skin Losses from green mold can be reduced by preventing injury during harvest and transit. The fruit is treated in the packing shed with a fungicide solution.
Figs Fig Rust - evident as small, angular, yellow-green flecks on the leaf. The spots do not become extremely large but do become more yellow and finally a yellowish-brown. The margin of the spot is reddish in color. On the upper surface the spots are smooth, Fungicide applications should be started in the early spring when the first leaves are completely grown. Make additional applications as new growth is formed. Do not spray when the fruit is one-fourth inch in diameter as the spray residue will make the fr
Loquat Mushroom Root Rot attacks a wide range of orchard and shade trees as well as shrubs. First symptoms range from a slow, gradual decline to rapid death. Slow death of the tree or shrub after the affects of infection are noticed in the aboveground parts is t
Dead areas are produced in the bark on the main stem and larger roots just beneath the soil surface. When the dead bark is peeled back, the white growth of the fungus over the surface of the wood constitutes a distinguishing character of this disease. The
Since the pathogen exists in most forested soils, mushroom root rot is usually related to previous stress in the tree which lowers host vigor. The stress may be environmental such as drought, flood or poor drainage; people-caused, such as construction, fi
The fungus can survive on small dead roots. Therefore, remove from the soil as many roots as possible before replanting. In addition, soil around the old root system should be fumigated or replaced with fresh soil. The objectives of these treatments are t
Mango Sunburn - The surface of a portion of the fruit is dried and slightly sunken, but firm. This is an injury that can result from heating when water or sprayed material on the fruit surface concentrates sunlight.
Papaya Stem Rot - This disease was seen on young transplants. The initial symptom is a watersoaking of the lower stem followed by its disintegration. Plants eventually wilt. Often, the white, cottony growth of the fungus is visible Transplants should be planted in soil with good drainage. Stems should not be banked with soil.
Strawberry Verticillium Wilt- This is a widespread soil-borne disease of strawberries growing in cool, poorly drained soils. Symptoms show up as a burning of the outer margins of the leaves. Young roots turn black at the tips and die back. Consider a variety which has resistance to the wilt organism. Soil fumigation with a chloropicrin-containing fumigant is recommended when resistant varieties are not available. When using soil fumigants, follow manufacturer`s directions and use caution in
Plum Plum Pockets - Plum pockets are a fruit disorder of little economic importance. Infection occurs soon after bud break under cool, wet conditions. The skin of the fruit is first a reddish color and then a velvety gray. Infected fruit becomes distorted and A fungicide program used to control peach leaf curl will also control plum pockets.
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