Leaves look exactly like yours. Treatments with Mospilan 20 SG, Faster 10 CE, Confidor Energy, Actara 25 WG, Actellic 50 EC. Healthy wood is green here; diseased wood will be orange or brown. If the temperatures are between 18 and 20 degrees Celsius the spots brunify. Anthracnose produced by the Glomerella cingulata. Apple scab produced by the Venturia inaequalis. You might even see small insects. How to Stop a Plant's Leaves From Getting Brown Spots, University of California Department of Agriculture and Natural Resources: Alternaria Diseases, University of California Statewide Integrated Pest Management Program: Apple and Pear Scab, University of California Statewide Integrated Pest Management Program: Entomosporium Leaf Spot, University of California Statewide Integrated Pest Management Program: Apple Mosaic, Leaf Diseases on Granny Smith Apple Trees, How to Treat Apple Scabs on Red Flowering Crabapples, The Leaves on My Apple Tree Are Turning Brown. It is recommended to use an insecticide such as Karate Zeon. Make sure to prune any infected wood. The lesions on older leaves are more definite in outline, and become velvety-grey to sooty black. Apple leaf-curling midge (Dasineura mali). Spots first appear on young leaves, darkening and enlarging as the leaves mature. The fungus lives on both juniper trees, including the red cedar and ornamental junipers, and apple trees and must spend part of its life cycle on a juniper tree before affecting apple trees. Treatment here. If the attack is strong the tree losses the leaves from the summer. The bark from the affected area exfoliates, and the tissue sinks. Due to that, the attack can be confused very easy with the attack of Woolly apple aphid (Eriosoma lanigerum). The aphids colonise the lower part of the leaves. The preharvest interval is specified on the label. If you catch black rot early, the fruit is treated with sulfur spray. Leaf loss weakens the tree when it occurs many years in a row. Usually, the attack can be observed on one side of the leaves. Spray the apple tree with horticultural oil while dormant, then again when the leaves are 1/2 inch and again right before the tree blooms, when the small buds begin to turn pink. The female lays its eggs on the fruits, in the area of the calyx. If that happens for several years in a row, your apple tree could be in peril. It shows up as a scattering of orange, yellow or red spots on foliage. Treatments when 10-15% of the petals are fallen, with one of the products: Affirm, Fastac Active, Actara 25 WG,  Decis Mega EW 50, Karate Zeon 50 CS. Once into the leaf, the fungi continue to grow and leaf tissue is destroyed. If you suspect your apple tree may be infested with a Phytophthora disease, perform the same sort of test you would to see if an arborvitae shrub (Thuja) is dead or alive. The attack appears on the leaves of young sprouts through the appearance of some white spots. As the fungus develops, those black spots o… The attacked trees look like were burned by the fire. Coat the leaves thoroughly when disease appears and repeat weekly until no new signs of disease are visible. If I remember correctly, last year the leaves didn't get brown spots until later in the season. The apple is native from Asia and it is assumed that is cultivated in Europe since the Roman Empire. Clean the interior of the sprayer tank, rinse, and allow it to air dry. Not at all an expert of apples, but I had curling leaves earlier this year. How to Control Cedar Apple Rust. The attacked trees won’t grow, the fruit buds won’t appear, the fruits remain small, the yield being strongly affected. For detecting the presence of this pest, the trees should be examined very well. It is considered the most damaging disease of the trees cultivated in the cold and rainy areas. The larvae penetrates in the fruit where it diggs superficial galleries. The spots will grow, and will cover with a velvety mycelium. On leaves: Patches of olive-green spots or blotches appear, which are initially velvety as they release airborne spores, and then darkening. Fungicides can be used to manage apple scab. The fungus develops it first stages on juniper, after that the spores are transported by the water and wind, and the fungus infects the apple. I have two Mac apple trees and they seem to be having trouble I have not identified. Maintaining bare soil around the tree can also help halt the spread of disease. The trees have the growth slows and dry prematurely. Gathering and burning of the fallen leaves and fruits; Treatments with Champ 77 WG, Melody Compact 49 WG, Funguran OH 50 WP, Dithane M 45, Bouillie Bordelaise WDG. Apple trees are perhaps one of the most popular fruit trees to grow in the home garden, but are among the most prone to disease and problems as well. Put all fallen leaves from the apple trees into trash bags to smother and dispose of the leaves and spores. I've been watering them daily via drip irrigation so they are definitely getting plenty of water. You can cut or shave off the cankers (that's what they are called on trees) from the trunk and put pruning sealer on them. The larvae attacks the buds and the leaves and can produce tree defoliation. Rust (Transchelia Discolor) Mix together 1 teaspoon of mild dish soap and 1 gallon of tepid water. The attacked tissue wrinkles and dries. Those will extend and will cover the whole leaf. After hatching, the larvae diggs galleries in the attacked fruits, leaving inside faeces. It is a polyphagous species that attacks the vine, shafts, ornamental shrubs and fruit trees. The leaf spots caused by Entomosporium leaf spot are redder than those found in other leaf diseases -- this coloration coupled with the yellow halo surrounding the small spots makes it simple to identify on an apple tree. Like other leaf spots, Entomosporium can be slowed by cleaning up fallen, infected plant debris. This disease attacks all the aerial organs of the tree. The attacked sprouts are brunified, but won’t twist. Please give us more information. On the wet weather, the lesions will get covered by a sticky liquid. The disease appears through the wilt and the brunification of the leaves. If the attack is strong the tree losses the leaves from the summer. This disease attacks all the aerial organs of the tree. It is a polyphagous species that attacks over 47 species of herbaceous plants and trees. Leaf affected by Apple Scab. It is a polyphagous species that attacks ornamental trees (Mulberry tree, London plane etc.) Larger plantings should be treated with neem oil, mixed at a rate of 2 tablespoons per gallon and applied with a sprayer once weekly. Appliance of the recommended in the vegetative rest; Treatments in vegetation with Champ 77 WG, Antracol 70 WP, Score 250 EC, Systhane Plus 24 E, Polyram DF. Most pests can either be seen, or they leave visible clues, such as eaten segments of leaves. The appearance of this disease is favored by high atmospheric humidity, wind, rain and temperatures between 10 and 30 degrees Celsius. Cedar apple rust (Gymnosporangium juniperi-virginianae) is a fungal disease that requires juniper plants to complete its complicated two year life-cycle.Spores overwinter as a reddish-brown gall on young twigs of various juniper species. This moth attacks the sprouts, the leaves and fruits of the fruit trees, but the most damaged are the fruits. Apple blossom weevil (Anthonomus pomorum). This looks like cedar apple rust, which is common on unsprayed apple trees. The Rust will next appear on the fruit, about two weeks after the spots on the leaves. 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