![]() Interested in growing a royal raindrops tree in your garden? Read on for more information. The dark green leaves turn a bright coppery red in autumn. The blooms are followed by tiny, reddish purple fruits that provide food for birds well into winter. It lists methods of control and products that can be used to control apple scab.Royal Raindrops flowering crabapple is a newer crabapple variety with bold pinkish red flowers in spring. Please read the publication I included in my first response. If you decide to use a fungicide in the spring, it needs to be applied to healthy leaves to be effective. What you can do now is continue to water well until the ground freezes, remove all fallen tree debris and discard it in the garbage and reevaluate in the spring. ![]() The key to using any of these products is to make sure the disease or insect you want to treat is listed on the label as well as the plant you desire to treat. Fertilizer promotes new growth which doesn't have time to harden off for the winter and the new growth uses up precious carbohydrate (food) reserves the plant stores to survive the winter. Also, we don't recommend fertilizing trees in the fall or when they are stressed. Apple scab is a fungus, not an insect, so the product you applied will have no effect if apple scab is the problem. The product you purchased is a systemic insecticide combined with a long acting fertilizer. ![]() Learn more about this disease and control options here: Sometimes fungicides are used but must be applied yearly early in the season to healthy leaves BEFORE any infection starts. It's possible that this "base" color resulted in coppery leaves that dropped instead of the typical yellowing of affected leaves.Ĭontrol of scab involves raking up and disposing of all fallen leaves, making sure there is good air flow between trees by properly spacing them and pruning them. The healthy color of your tree leaves is deep purple. Several years of early leaf loss can result in decreased growth, reduced bloom and increased susceptibility to winter injury. Severely infected leaves turn yellow and drop prematurely, weakening the tree. ![]() If your trees are getting proper care, planted in appropriate locations and are not suffering from insects or physical damage as described above, the best guess I can make is they may have apple scab.Īpple scab is a fungal condition that occurs most often during moist conditions. It is difficult to diagnose your problem from limited information. Your trees are stressed as evidenced by their unhealthy appearance and can be due to many factors: under or over watering, too much shade, insect damage, disease, and physical damage from things like lawn mowers, weed whips, animals, and so forth. Your variety is known to have good disease resistance to the most common afflictions of apple trees: fire blight, apple scab, apple rust, and powdery mildew but resistance is relative and doesn't mean the tree is immune to disease problems. They thrive best in rich, moist, slightly acidic loam type soil with good drainage and full sun exposure of 8 or more hours per day. Typically, crabapple trees are quite tough once established. ![]()
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