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Studies on the population occurrence of spider mites (Tetranychidae) on some raspberry cultivars

, : Studies on the population occurrence of spider mites (Tetranychidae) on some raspberry cultivars. Prace Instytutu Sadownictwa w Skierniewicach, A78 recd 1980; 20: 217-221

The population density of species of Tetranychidae on 5 raspberry cultivars was studied in 1972-74 in a plantation in Skierniewice in central Poland. The population density of the mites (mainly Tetranychus urticae Koch) was estimated every 2 weeks in plots receiving fertilizer treatment. The least infested cultivar during the study period was Malling Exploit; however, at the times of heaviest infestation, 7-13 mites/leaf were found on this cultivar.


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