Brambles are defined as any species belonging to the Rubus genus. This definition covers a large number of plants found growing in the woods and fields surrounding us. Practically speaking, however, the brambles of concern to the home gardener are raspberries (red, black, and purple), blackberries (thornless and thorny), and some of the recently developed hybrids such as tayberries.
The following descriptions of insect damage are general guidelines that can vary in severity based on a number of factors. Provisional action thresholds prescribe treatment when 15 percent or more of the leaves are destroyed by defoliating insects, or when 4 percent or more of the clusters are destroyed by cluster-feeding insects.
Scales, Including Putnam Scale and Terrapin Scale
Under most conditions, insects are not perennially serious pests of currants and gooseberries; however, certain insects occasionally will become abundant enough to cause serious damage if left uncontrolled.
Because elderberry is a native plant, several native insects and mites feed on it. Although most of these are checked by natural controls, some plant damage occasionally will take place. Few insecticides are registered for use on elderberries, so controls must be primarily cultural.
Although the kiwi fruit, once referred to as the "Chinese gooseberry," has been grown and collected from the wild for centuries in Asia, it only recently has become commonly available in the Western world.