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He Problem of the Mite Species Tetranychus urticae Koch on Cotton in Iran
Author(s) -
Moradeshaghi M.J.
Publication year - 1973
Publication title -
eppo bulletin
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.327
H-Index - 36
eISSN - 1365-2338
pISSN - 0250-8052
DOI - 10.1111/j.1365-2338.1973.tb02300.x
Subject(s) - biology , tetranychus urticae , spider mite , mite , horticulture , toxicology , pest analysis , acaricide , botany , convolvulus , weed
The cotton spider mite Tetranychus urticae Koch has become a serious pest, in the Gorgan and Gonbad areas during the last few years. This problem is due to various factors such as continuous use of organochlorines, presence of different wild host‐plants around the cotton fields, cultivation of early growing crops in cotton growing areas, and exposure of mite populations to sub‐lethal doses of pesticides. During 1969 and 1970 different experiments were conducted to find a suitable acaricide to control mites. Twelve pesticides were used and percentages of mortality were calculated. The data were analyzed statistically, and it was shown that Neoron and Morocid, respectively, caused the highest mite mortality. Fifteen different species of wild hosts were surveyed to count their mite populations. It was found that Althea sp. (marsh mallow) had the highest number of mites on its leaves. Other plants such as Chenopodium album (goose‐foot), Rubus sp. (red raspberry), Solanum nigrum (black night‐shade), and Convolvulus tricolor (tri‐coloured bindweed) were also heavily loaded with mites.