Plum curculio curculio is a ¼ inch long beetle that tunnels through apples. For a complete background on how to grow apple trees.
Woolly apple aphid is a sucking insect pest that weakens the tree by feeding on limbs and roots.
Apple diseases and pests. The fungal disease apple scab appears in the spring. Apples are easy to grow productive and there are cultivars shapes and sizes for every garden. Colonies form at wound sites on trunks limbs and twigs where they feed on tender bark.
Fire blight first appears during wet spring weather after an apple tree has begun. Pruning and hail damage can create the wound sites for attack by this pest. Codling moths codling moths hatch within days and the larvae tunnel into the apples to feed.
Pest and diseases affecting apple tree branches and trunk. Examples of good practices are. Bark cracked patches of bark sunken down.
This is part 7 in a series of 11 articles. Adequate watering fertilizing as needed seasonal pruning preventative and active spraying fall cleanup and winter protection. The disease is caused by the fungus venturia inqequalis which overwinters in infected leaves left on the ground.
Apple scab is one of the most common and most serious diseases that afflict apple trees. They can be susceptible to a range of pests such as the woolly aphid pictured below diseases and disorders but in most cases action can be taken to prevent or control the problem. Canker is a fungal infection which enters tree wood at the site of existing damage normally caused by bad pruning techniques although damage by woolly aphid see above can also allow the fungus to enter the tree.
Pest disease control for apple trees. The fungal disease cedar apple rust causes raised. Major insect pests affecting apples apple maggot flies apple maggot flies lay eggs in developing fruit in june or july.
It usually appears in early to mid spring and is more prevalent during rainy weather. Relative toxicities of insecticides and miticides used in apples to natural enemies and honey bees 1015 general properties of fungicides used in apples 309 fungicide efficacy for apple diseases 617 treatment timings for key diseases 617 fungicide resistance management 617. The apple tree diseases and pests fire blight.