In its early stages, frogeye leaf spot appears as circular brown spots on apple tree leaves. The leaf spots are the first visible symptom to develop on the apple trees. I looked and I did not see any signs of aphids under the leaves. Lesions may also affect the fruit, causing unattractive, sunken yellow, orange or brown spots on the apples. There are no brown spots on the leaves that I could see. Many of the apples have spots and many have worm holes but few worms. These eventually grow larger and darker, with red borders and tiny black spots in the centers. ... Irregular brown spots/blotches with lighter centers and darker borders on leaves due to black rot disease. Flatheaded Apple Tree Borer. The first signs of apple scab occur on the underside of leaves: dull, olive-green round spots, often along the leaf veins and on the leaves closest to the buds. Symptoms: Spots on young leaves are velvety and olive green turns black; leaves wither, curl and drop. If anyone has any answers, please let me know. I monitored the soil at the base of the tree to ensure that it had adequate water. 2. As the fungus spreads over the tree leaves, the leaves will yellow and drop. Slightly raised, black spots deform the fruits. 1. The orange spots on your apple trees are a type of rust. The leaves of the tree are oval in shape and can reach up to 13 cm (5.1 in) in length and 7 cm (2.8 in) in width. Symptoms begin as small, bright orange specks on the leaves of the apple tree. If however, your tree undergoes this defoliation process more than three years in a row, the tree could be negatively impacted. Many of the the leaves have brown spots that appear to have small insects inbedded but I never see any. ... Apple tree with a yellow sticky trap for apple maggots (Rhagoleti pomonella). The spots are less than 6 mm (1/4 inch) in diameter and are darker at the edges than at the centre. Frogeye leaf spot is caused by Botryosphaeria obtusa fungus. Severe infections can affect the entire leaf, causing it to turn brown and drop from the tree. Adults are small brown beetles that may target the graft location (in young apple trees) for laying eggs as well as damaged or sunken areas. This is my first fruit tree. The ground under the trees is kept clean. I have two Mac apple trees and they seem to be having trouble I have not identified. The Rust will next appear on the fruit, about two weeks after the spots on the leaves. If you notice leaf spots affecting your trees early in the spring, the afflicted leaves may fall off and new leaves could return sans spots. Apples are susceptible to three kinds of rust: cedar apple rust, quince rust, and hawthorn rust. The sign of cedar-quince rust is the presence of rusty spots on your tree's leaves; the apples themselves may also be misshapen and/or suffer from mottling. These spots gradually grow into brown or black large circles with a velvet-like surface up to half an inch across. 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