July 13, 2005

Wild Parsnip -- a Weed to Watch


Conditions have been especially favorable this year for wild parsnip, Pastinaca sativa, a common roadside weed in Iowa. Wild parsnip is a non-native plant in the parsnip family that originated in Europe. The edible roots were consumed in ancient Greece and Rome and there are still some cultivars grown for food today. Wild parsnip also poses a health hazard that many people may not be aware of.

Tip Blight of Junipers


Junipers are particularly susceptible to Phomopsis and Kabatina tip blight, two damaging fungal diseases that cause needle browning and dieback at the tip of the branches. Tip blight of junipers is caused by two different species of fungi, Phomopsis juniperovora and Kabatina juniperi, which cause similar symptoms in the affected plants. However, the two diseases differ by the time of the year when they occur and their development on the plant.