Home Tree Fruit Production and Pest Management | Oklahoma ...- insect spray trader fruit trees varieties identification diseases ,While few fruit varieties have been selected to resist insects, stone and pome fruits have been selected to resist diseases such as bacterial spot, black knot, cedar apple rust, fireblight, and scab. When selecting a variety for planting be aware of the most common disease problems for your area.Backyard Fruit Trees | WSU Tree Fruit | Washington State ...General information on controlling tree fruit insect pests and diseases is listed below. There are also pest management options available for growers not wanting to spray, like individually bagging fruit to exclude codling moth, for example. For pest and disease spray schedules for home garden fruit trees go to Backyard Fruit Tree Spray Schedules.