TRAVERSE CITY, Mich. – 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.

Apple growers may benefit from sophisticated weather models being developed at UNH that could predict when an orchard is at risk for infection.New Hampshire grows more than $10 million in apples ...

The fungal infection causes dark scabby lesions on the leaves and skin of the apple, which leaves the flavor unaffected, but does effectively make it unsalable. “It’s a huge issue,” says Peter Wagner, ...

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 ...

There are hundreds of choices when picking a crabapple tree from the nursery, but a Purdue University expert says only a handful are resistant to a widespread fungus or other serious diseases. After ...

There have been reports that 2024 has been a bad year for apple scab in both fresh-eating apples and crab apples. Apple scab infections on fruit start off olive-green and turn into a rough, cork-like ...

BOULDER COUNTY – Gardeners who plant apple trees are hopeful souls, putting in saplings as they dream of future pies, sauce, and tarts. With each season of growth, we croon encouragement at the plant.

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 ...

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 ...

Q: Can you tell me what is wrong with my crab apple tree, and what I should do about it? The leaves started turning yellow earlier this summer and now there are hardly any leaves left. It looks awful.

(Beyond Pesticides, August 24, 2011) Scientists say the fungus that causes apple scab appears to be growing more resistant to pesticides routinely used to control the fungus, worsening the threat of ...