Most “sick tree” problems can be traced back to underlying stresses that have reduced the tree's vigor, making it more vulnerable to diseases or insect pests.
Consider adding some flower power to your landscape to bring in the buzz of pollinators to your garden.
A codling moth goes through several stages in its life cycle. If you're trying to prevent damage to apples and other fruit, it helps to know when adults and larvae are active.
A guide for how to collect and where to get a sample analyzed for plant diseases.