New recorded of thrips species and seasonal fluctuation of some thrips on cucumber in the field during the Autumn season in Iraq

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Research Paper 01/02/2018
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New recorded of thrips species and seasonal fluctuation of some thrips on cucumber in the field during the Autumn season in Iraq

Sara Mohammed Alasady, Zahraa Abdul Muati Al-Ghadban
J. Bio. Env. Sci.12( 2), 109-116, February 2018.
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Studies were carried out in the field was cultivated by cucumber crop (Cucumis sativus) in central of Iraq during autumn season 2016. Three native, five new thrips species were identified in a cucumber field calculated from 1213 thrips specimans individuals. Melon thrips, Thrips pamli was the dominant species recorded 76%, the highest number of it was noticed in the first week of October recorded 42.1 individual species. Second highest number of thrips was shown by onion thrips Thrips tabaci recorded 23% of all pest thrips species, highest number of it was recorded at second week of October 2016 with an average of 9.1 individuals per leaf, whereas tomato thrips Frankliniella schultzie recorded 0.4%, Haplothrips sp., Eremiothrips sp. recorded 0.21% each, Anaphothrips sudanensis recorded the lowest percent (0.1%). Scolothrips sexmaculatus recorded 99.6%, followed by Scolothrips pallidus (0.4%) of all predators thrips which feeding on other thrips and preference feeding on two spotted mites Tertranychus urticae and white fly Bemisia tabaci, the average individual per leaf of S. sexmaculatus was 24.9 individuals per leaf.


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