You can also use pear tree varieties that are naturally resistant to the disease. Instead, water the soil and minimize splashing. This also causes the leaves to die and fall off the tree sooner. Prevention is more proactive than other approaches and includes using proper gardening practices such as not spraying the leaves with water, using naturally resistant trees, and selectively breeding pear trees for more resistance.įor example, when watering, avoid spraying the leaves as this spreads the infection from leaf to leaf. PreventionĪs you might have guessed, prevention is the best way to minimize and stop plant diseases. Treatment for these diseases include the following methods: Whether your pear tree has a bacterial or fungal disease, the treatments are largely the same. Specifically, interplanting chives with pear and apple trees has been shown to help prevent scab ( source).įor more information about pear tree companion plants, including how they can help prevent pests and diseases, check out my other post: The 10 Best Companion Plants for Pear Trees. One effective method of managing pear scab is companion planting. This disease can be managed with pruning and some sprays. Pear scab is most common from March to late June. Over time, the lesions turn grey and cracked. Pear scab ( Venturia pirina) is similar to apple scab, causing circular, velvety olive-black spots on the tree’s leaves, fruit, and branches. Like the other fungal diseases on this list, warm, wet, and windy weather commonly blow around these fungal spores, spreading the disease to other leaves and trees. If the infection is severe enough, it can impair the tree’s immune system, leading to other issues and could cause the tree to die. Other symptoms include fruit shrinking or cracking ( source). Pruning while the tree is dormant is best. Usually, this disease is active in late May and early June, and excessive infection can lead to yellow and dropping leaves. Fabraea Leaf Spot (Also Called Leaf Blight or Black Spot)įabraea leaf spot ( Fabraea maculata) is a fungal disease that causes pinpoint brown and black spots on pear tree leaves, fruit, and branches. To see a fire blight map of the US, check out this map on .Īlso, to read more about this disease, feel free to visit my other post: Fire Blight Treatment: Non-Organic & Organic Solutions. With these, fire blight is manageable and should have little to no further impact on your trees. The good news is some treatments prevent and slow the spread of fire blight (more on these later). The bad news is that fire blight is the most common pear tree disease, and there is no cure for it. This is why providing preventative treatment to the trees during the winter is important in handling this disease. However, during the winter, fire blight is dormant. This disease spreads most often in the springtime when it’s warm and wet (spreading the fastest when the temperature is above 70✯). Fire blight causes browning, blackening, and disfiguring of the leaves and fruit, sometimes killing the tree. Fire Blightįire blight ( Erwinia amylovora) is a highly infectious bacterial disease that affects members of the rose family-including apple, pear, crabapple, rose, cotoneaster, mountain ash, hawthorn, quince, spirea, and pyracantha. 3 Reasons Why Pear Trees Get Black Leaves 1. So, while pear trees get black leaves from several causes, how can we tell which issue is causing it, and how can we fix it? Let’s take a closer look. All three diseases are highly contagious and difficult to get rid of, with the best method being prevention. While fire blight is a bacterial disease, leaf spot and scab are fungal. Pear trees get black leaves from diseases including fire blight, fabraea leaf spot, and pear scab. I’ve seen some cases of pear trees getting black leaves but I wasn’t too familiar with what exactly causes it.
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