Excessive summer irrigation of oak and madrone trees may promote fungal diseases such as the oak root fungus (aka armillaria root disease) and crown rot.
When a heatwave hits, plants may show the impact. Learn the signs of heat stress in plants and how to help them weather a heatwave with best practices for watering, mulching, shading, providing humidity and weeding.
This article briefly discusses the most prevalent madrone disease problems, then offers a broader perspective on the health of this southern Oregon native.
Max Bennett, David C. Shaw |
Nov 2006 |
Article
Photo provided by Rowan Steele. (Cropped from original)
Degree-day models are tools that can help farmers predict development stages for plants, pests and plant pathogens. By measuring the accumulation of heat units, the models can help farmers decide what to plant and when.
Q: My so-called lawn needs help — it consists of clumps of grass with bare spots between. My small yard is completely fenced with a large apple tree shading much of it, so the grass gets at most 3 to 4 hours of sun ...