Apple growers in the eastern U.S. have a despised enemy known as apple scab — a disease caused by a fungus that forms ugly brown or greenish-black pockmarks on the fruit's skin. A scabby apple is ...

Q. I know that flowering crabs are subject to injury from fire blight. My crab is resistant to apple scab disease, but it is looking pretty sick now having lost maybe 1/3rd of its leaves, so I am ...

Q: I have a white flowering crab that we’ve had for about 20 years. Can you tell me what could possibly be wrong that’s causing the leaf problems, and is there anything I can do? — Christine W. A: We ...

Apple trees are the most commonly planted fruit trees in Wisconsin. However, humid conditions in Wisconsin during the growing season trigger many pests and diseases that affect the quality of apple ...

CORVALLIS – Wet weather, which is bound to come in the weeks ahead, builds potential for apple scab, a fungal disease of apples. The apple scab disease fungus overwinters on dead apple leaves and ...

Some crabapples are very susceptible to apple scab, and those not treated in spring may have lost many of their leaves. Their remaining leaves can be affected with black and yellow spots. Spraying at ...

Apple scab, caused by the fungal pathogen Venturia inaequalis, remains one of the most significant challenges to apple production globally. Intensive research has elucidated the complex interplay ...

Pear scab can attack pear trees in the spring. The fungus overwinters in infected, fallen leaves and in some cases on twigs, according to Jay Pscheidt, a plant pathologist with the Oregon State ...

It might be easy to grow and care for an apple tree, but keeping it safe? Well, that is where the problems begin. There is no shortage of pests and diseases that affect it, and any one of them could ...

With more than 7,500 varieties of apples from which to choose, there’s more than one way to “keep the doctor away.” But keeping apples healthy can be as challenging as keeping the humans who love them ...