Tytuł pozycji:
Effect of pesticides on the predatory mites
Bibliografia na stronach 834-835
Bibliographical references (pages 834-835)
Streszczenie w języku polskim
Pages 817-836 : illustrations ; 24 cm
Abstract in Polish
Strony 817-836 : ilustracje ; 24 cm
The author determined quantitative and qualitatiye variations in predatory mite associations in apple orchards treated with various pesticides. Attention was given in particular to the response of the association to the action of the pesticides. It has been found that the application of pesticides in apple orchards causes: 1) a delay in the growth of predatory mite populations, as compared with orchards which have never been treated, 2) changes due to the presence or absence of a sufficient amount of animal food (phytophagous mites), 3) changes resulting from the variable pesticide-tolerance of individual species of Phytoseiidae, 4) changes due to the decreased density of predatory insects in the orchards, following the treatment with pesticides.