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1. ... Apple tree with a yellow sticky trap for apple maggots (Rhagoleti pomonella). Symptoms: Spots on young leaves are velvety and olive green turns black; leaves wither, curl and drop. Many of the the leaves have brown spots that appear to have small insects inbedded but I never see any. 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. [h=2]Treatment[/h] Severe infections can affect the entire leaf, causing it to turn brown and drop from the tree. 2. 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. Apples are susceptible to three kinds of rust: cedar apple rust, quince rust, and hawthorn rust. The orange spots on your apple trees are a type of rust. 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. The leaf spots are the first visible symptom to develop on the apple trees. The spots are less than 6 mm (1/4 inch) in diameter and are darker at the edges than at the centre. Lesions may also affect the fruit, causing unattractive, sunken yellow, orange or brown spots on the apples. These eventually grow larger and darker, with red borders and tiny black spots in the centers. Many of the apples have spots and many have worm holes but few worms. These spots gradually grow into brown or black large circles with a velvet-like surface up to half an inch across. ... Irregular brown spots/blotches with lighter centers and darker borders on leaves due to black rot disease. 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. There are no brown spots on the leaves that I could see. 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. Fruit also has spots, is deformed, knotty, cracked and drops. I monitored the soil at the base of the tree to ensure that it had adequate water. In its early stages, frogeye leaf spot appears as circular brown spots on apple tree leaves. Prevention & Treatment: Plant resistant varieties for best control. If anyone has any answers, please let me know. Symptoms begin as small, bright orange specks on the leaves of the apple tree. Flatheaded Apple Tree Borer. I have two Mac apple trees and they seem to be having trouble I have not identified. The ground under the trees is kept clean. Frogeye leaf spot is caused by Botryosphaeria obtusa fungus. Slightly raised, black spots deform the fruits. The disease begins in spring as dark, olive-green leaf spots that are less than ½-inch in diameter. 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