July 2, 2004

Oak Wilt Sampling

Oak wilt is a lethal fungal disease that causes oak trees to show leaf discoloration and overall wilt. Red oaks are more susceptible and are killed faster than the more resistant white oaks. This disease is spread most efficiently through root grafts, but also is spread by insect vectors.

Weed Management in Raspberries

Weed control in raspberries is necessary to reduce competition for water, nutrients, and sunlight. Cultivation and mulches are the most practical control measures for home gardeners. Cultivate the raspberry planting frequently during the spring and summer months. Small weed seedlings are destroyed easily. Large weeds are more difficult to control. To prevent injury to the raspberry plant roots, do not cultivate deeper than 2 to 3 inches.

Tomato-like Fruit on Potato Plants

Occasionally gardeners are surprised to find small, round, green, tomato-like fruit on their potato plants. These fruit are not the result of cross-pollination with tomatoes. They are the true fruit of the potato plant. The edible tubers are actually enlarged, underground stems. Normally, most potato flowers dry up and fall off the plants without setting fruit. A few flowers do produce fruit. The variety 'Yukon Gold' produces fruit more heavily than most varieties.