Olive trees are very hardy. Some in the Sacramento Valley are more than 100 years old. But that doesn't mean they aren't susceptible to pests and diseases just like any other crop-growing tree.

Federico Manni first noticed something was wrong with his family's olive trees about six years ago. It was summer, the cicadas were singing, and Manni and his father, Enzo, were weaving through their ...

Yellow spots on the leaves of your apple tree can be indicative of apple scab disease. If the disease is left untreated, however, these yellow spots will darken, changing into an olive color. The ...