Downy mildew was confirmed on cucumber in Mifflin County on July 11. Warmer weather throughout the state is helping crops along, but has also been good for insect pests.
Wet weather and variable temperatures across the state continue to be challenging for vegetable and berry production.
Cloudy weather, rainstorms, and variable temperatures across the state have slowed some crops and created very favorable conditions for disease development.
Conditions were incredibly optimal for many tree fruit diseases during the month of May. Management strategies for pome and stone fruit diseases are discussed.
Trees need to be protected during wet conditions. The following are strategies for keeping diseases in check on apple and stone fruit during persistent rainy weather.
It’s no secret that this spring has been cold and wet across Pennsylvania. On many farms, planting has been delayed as much as three weeks, and many crops already in the ground are developing more slowly than usual.
The forecast for May 15–18 indicates conditions will be favorable for apple scab and bacterial spot on peach infections. If infections occurred during bloom, fire blight symptoms could begin to appear this week.
Bloom is occurring in Pennsylvania apple growing regions—fire blight conditions continue, available mature apple scab spores are very high, and an apple scab infection event is predicted for May 10, 2018.
Severe fire blight and apple scab disease conditions are predicted for May 3–5, 2018! Protection is absolutely necessary!
May 3–5 could be potential infection periods for apple scab and fire blight. Brown rot infection conditions favorable for open peach blossoms this week.
Tight cluster is the time powdery mildew spores become active. April 24 – 25, 2018 is a predicted scab infection period; be sure trees are covered with protection.
April 15–16 is predicted to be a scab infection period due to green tip present and mature scab spores available. Copper applications recently applied will offer protection.
Growers can get a jump on management for this fall to control fungal and bacterial disease in apples and stone fruit to mitigate problems in the 2018 season.
Conditions may be optimal for several fungal and bacterial pome and stone fruit diseases in July.