Population dynamic of Tetranychus urticae on cucumber in Erbil region with study of the effects three different miticides on T. urticae

Abstract

Abstract The current study was carried out to survey the occurrence, identify and control two-spotted spider mite (TSSM) Tetranychus urticae on cucumber plants within greenhouse in Erbil province. Samples of mite were collected in four locations of cucumber fields. A total of 324 leaves from 108 plants were collected and the mites were removed from the host leaves. Bermectine, Speed and Kanemite were applied as chemical control agents with three different time intervals in field and two different time intervals in laboratory using spray and soaking methods. Results proved that T. urticae Koch infested cucumber fields in Erbil province. From inspection of cucumber in greenhouses of four different locations, T. urticae were found in all inspected locations and the greatest population was observed in Barhushtr area. The highest percent mortality of mites was obtained when Speed was used. Percent mortality was 100% both methods. Meanwhile, the mortality percentages applying Bermectine and Kanemite in socking method were 38.14% and 41.24% respectively whereas, they showed low mortality of mites which were 80.46% and 77.01% after 48 hours in soaking method respectively. This finding concluded that Tetranychus urticae is widespread in Erbil cucumber fields and Speed was the best miticide against it.