Cherry Shot Hole: Are these holes from a bug? скачать в хорошем качестве

Cherry Shot Hole: Are these holes from a bug?

Are you finding holes in the leaves of your flowering cherry? There is a fungal disease that is becoming more and more prevalent in our communities called ‘shot hole’ disease. When the disease attacks it appears to be more like an insect chewing holes. Let’s take a look and determine how to tell it is not a bug. Symptoms for the Cherry Shot Hole Disease are premature yellowing and tiny numerous ‘shot holes’ in the leaves. Before the holes begin, the leaf has reddish brown spots that turn brown and with age the centers fall out. This is why you may be fooled into thinking that it is a chewing insect. The holes are very small and neat! The disease can be discouraging to the homeowner when they see half of their tree foliage yellowing and falling to the ground in June and July! What can you do? At this time action is too late. Most mature trees can withstand defoliation as long as a second big stress event does not occur. As with any disease you must identify which of the fungi or bacteria is the culprit before any action is taken. Contact your Extension Office to help with this step since the cherry shot hole disease can be caused by many different pathogens. The most important question is a control spray program sustainable? Fungus are not cured, they are only prevented. Leaves are most susceptible to fungi disease when they are first unfolding and young. Applications of fungicides would occur during these tender growth stages. Applications would have to cover the entire tree. Too often the homeowner’s trees are large and prevention is better left to Mother Nature. The culprit who spreads the disease, summer rainfall, decreases with the season. Less rainfall means less infection. So changing weather can check the disease. See the University of Maryland controls if you want to begin a preventative program:https://extension.umd.edu/hgic/topics... The University of Maryland Extension Home and Garden Information Center's mission is to develop and deliver science-based, sustainable gardening information and solutions through outreach education for better human and environmental health. Joyce Browning Horticulturist, Master Gardener Coordinator Video credit: Bethany Evans Longwood Gardens Professional Gardener Program Alumni; CPH Send us your plant and pest questions. Our Certified Professional Horticulturists are ready to help! http://extension.umd.edu/learn/ask-ga... Explore our extensive gardening content online. http://extension.umd.edu/hgic