but it can be a somewhat more serious matter for apple trees, including ornamental crabapple trees. Infected leaves get spots and may shrivel. Rust also can cause spots on apples, and may keep the ...

Cedar apple rust is the culprit. My apple trees are apparently doomed ... In early summer, yellow spots about 1 / 4 inch in diameter form on apple leaves. The spots gradually enlarge and turn orange.

In the last two years, the tree has blossomed and then the blossoms fell of as well as the leaves and ... develop, apple maggots that live over winter on fallen fruit, rust, apple scab - and ...