![]() Some cultivars are more prone to fire blight infection than others. And it really can spread almost as fast as wildfire! The bacteria are spread by wind-borne rain splashes carrying the spores from fallen leaves or infected tissue to healthy wood in springtime. Symptoms of fire blight include wilting of new shoots, dieback of branches or entire limbs, and dark brown to black lesions on bark or stem. It is caused by the bacteria Erwinia amylovora, which can infect fruit, flowers, twigs, and leaves of infected plants. Fire blightįire blight is a serious bacterial disease that affects apple trees, as well as other hosts such as pear, crabapple, and mountain ash. ![]() Apple tree diseases can be a complex topic, but understanding the basics is essential for properly caring for and maintaining your apple trees. Other common apple tree diseases include fungal pathogens like powdery mildew, anthracnose, and perennial canker, as well as viruses like apple mosaic virus, apple russet ring virus, and apple green crinkle-associated virus. By using the right timing and application of these preventative measures, you can increase your odds of keeping your apple trees strong and productive during their growing period. To mitigate this issue, fungicides containing active ingredients such as myclobutanil or thiophanate methyl should be applied at regular intervals from just prior bud break until petal fall. Good sanitation practices like removing fallen leaves from around the base of your tree will help reduce infection rates since spores overwinter in debris left behind after harvesting season has ended.Īs humidity levels rise in the springtime, cedar apple rustcan cause orange-yellow lesions to form on young foliage, resulting in reduced photosynthesis efficiency and stunted growth potentials if left untreated. Symptoms include discolored spots on the surface of the fruit or leaf, which may eventually crack open, leading to premature dropping from the tree before harvest time arrives. Fire blight can be treated with antibiotics if caught early enough however it’s best avoided altogether by planting resistant cultivars of apples like ‘Liberty’ or ‘Empire’, which are known for their resistance against this disease.Īpple scab is another common fungal disease that affects both leaves and fruits of susceptible varieties. It causes leaves and twigs on infected branches to turn black or brown suddenly, giving them an appearance similar to being burned by fire – hence its name. Knowing how to identify and treat these diseases can help you keep your apple trees healthy and productive for years to come.įire blight is a bacterial disease that affects apples as well as other plants, such as pears and crabapples. ![]() Common apple tree diseases include fire blight, apple scab, cedar apple rust, powdery mildew, and several viruses. Need more info? The basics of apple tree diseasesĪpple trees are, unfortunately, vulnerable to several illnesses. ![]()
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