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.
OSU research indicates that the less toxic iron phosphate containing slug baits are as effective as those with metaldehyde.
Home remedies have shown some effectiveness against many garden pests and diseases.
Trees all over Oregon are displaying signs of poor health. People are quick to blame insects, but insects are rarely the underlying cause of the problem. Drought and other stressors can make trees vulnerable to pests and disease.
Control plant-eating mollusks early and often
Gardeners with small-scale orchards can take advantage of hazelnut varieties bred in recent years at Oregon State University that resist eastern filbert blight.
You may have encountered white, segmented “worms” or grubs when chopping firewood and wondered what they were. Common questions include, did they kill my tree? And are they a danger to other trees? The quick answers are no, and no.