Mites – tree pest.
In addition to insects, harmful spider mites appear on the leaves and needles of city trees (Tetranychidae).
The common spider mites include the lime tree spider mite (Eotetranychus tiliarium Herm.). It is especially dangerous for young trees. In the event of a mass occurrence of the leaves, branches and trunks are covered with fine, glassy yarn. The lime tree spider mite can also attack poplars, willows and elms.
The spider mite can be found on the needles of coniferous trees and shrubs (Oligonychus ununguis Jac.).
In cities, there is also often an increased occurrence of other mites, called spoils (Eriophidae), very small, difficult to see with the naked eye, because only 0,3 mm. They are, as a rule, monophagous pests. They cause characteristic growths on plants, called zoocecidia, discoloration, growth of filamentous hairs, deformations of leaves and buds. Some speleo species are vectors for viral diseases. The following are common disgusts.
Ashwort spit (Eriophyes ashnivorus Nalepa) - sucks the juices from flower buds, thus causing their "cauliflower" distortions.
Spitz spitz (Eriophyes left Nalepa) - causes cobblestone alder leaves, green growths, which gradually turn red and brown. Hazelnut hazel (Phytoptus avellanae Nalepa) - distorts hazel buds.
Lipowiec Speciel (Eriophyes tiliae Nalepa) - it is common on linden leaves, causing red, conical growths.
Black cherry moss (Eriophynes padi) - causes club-like growths on the leaves of bird cherry. Systemic preparations are an effective means of fighting mites, e.g.. With a 58.
*
Harmful insects found on the buds, shoots, branches as well as in the bast and wood of the trunk and on the roots of the more important trees are presented in the table. The arrows next to the names of pests indicate the possibility of a given pest occurring in the indicated parts of trees.
The names of the insects are underlined, which cause noticeable damage to trees in the city. The purpose of this table is only to inform, what species can occur in trees of green areas, on the other hand, it is necessary to define a given pest and familiarize yourself with the methods of its control on the basis of the keys, textbooks and encyclopedia of plant protection and forest protection.
