SONGKLANAKARIN JOURNAL OF SCIENCE & TECHNOLOGY

Volume 41, No. 06, Month NOVEMBER, Year 2019, Pages 1390 - 1395

Evaluation of cucumber cultivars for resistance to tetranychus urticae koch. and tetranychus turkestani ugarov & nikolski (acari tetranychidae)

Seyed Saeid Modarres Najafabadi

Abstract Download PDF

Forty-three cucumber ̏Cucumis sativus L.̋ cultivars were tested against two spotted spider mite ̏Tetranychus urticae Koch̋ and strawberry spider mite ̏Tetranychus turkestani Ugarov & Nikolskii ̋. The experiment was implemented in a randomized complete block design with 43 treatments (cucumber cultivars) and check treatments in greenhouse conditions between 2015 and 2016. The results showed that the highest numbers of eggs laid per female per day by the T. urticae and T. turkestani were 8.98 and 9.23, respectively, which were recorded on the Taha cultivar. The lowest numbers of eggs laid per female per day were 2.23 and 2.21 by the T. urticae and T. turkestani, on the Samer star and Danitu cultivars, respectively. The highest visual damage ratings were recorded on the Taha cultivar (5.75 for T. urticae and 5.78 for T. turkestani) and the lowest damage ratings of 2.49 and 4.25 were recorded on the Samer star and Storm cultivars for T. urticae and T. turkestani, respectively. Based on our findings, Taha cultivar was found to be a susceptible cultivar and Samer star cultivar proved to be a resistant one. These two cultivars could be used as differential hosts in further studies.

Keywords

cucumber, damage rating, resistance, spider mites

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