It has been a wet spring here in Williston, but your trees may need more than just glorious, life giving rain. Yes, the sun is shining, the grass is greener, and birds are helping to pollinate other plants. But as flowers and fruits start growing, so are fungi and pests that feed on your trees. Some trees most at risk are your fruit trees - apple, crabapple, pear, plum, cherry, apricot, and others. The recommended way to avoid these problems is by maintaining a good sanitation program.
Well maintained trees can improve the appearance of any property and increase your chances of enjoying succulent fruits all season long. You may even have to consider spraying your trees.
As much as we may love our fruits, there is another species that loves them even more - insect pests. Two of the most common pests affecting trees in ND are the codling moth and apple maggot. Before you schedule a spraying, make sure you actually have an infestation. How do you know if you have an infested tree? One of the first visible signs of pests and fungi will show on the leaves. Watch out for leaf discoloration, borer holes, abnormal leaf sizes, or sudden thinning foliage. Symptoms of an infestation may also present themselves on the bark of your tree in the form of holes and frass on the trunk, unusual branch growth, and lifting roots.
When should you spray your trees? The dormant winter season is often the recommended time for applying pesticides to your fruit trees. You can spray most fruit trees up to the time the buds swell.