Abstract
Nematode samplings in cultivated and wild olive in Crete, Greece, yielded the presence of Bitylenchus hispaniensis , Helicotylenchus microlobus , Helicotylenchus vulgaris , Merlinius brevidens , and Pratylenchoides alkani . With the exception of H. microlobus and M. brevidens , reports of these plant-parasitic nematode species constitute new records for Greece. Bitylenchus hispaniensis is also reported for first time in a country outside of Spain, where it was originally described. Pratylenchoides alkani is herein reported for the second time in the Mediterranean area and for the first time in association with olive. Two further populations of H. microlobus and H. vulgaris , from walnut and goji berry from Greece, were identified. Molecular data for all of these nematode species are provided, resulting in the first integrative identification of these Greek populations.
Highlights
Olive (Olea europaea subsp. europaea L.) is the most common crop on the island of Crete, Greece, while clusters of wild olives (Olea europaea subsp. sylvestris L.) are located in several non-agricultural areas (Tzortzakakis et al, 2014)
Soil samples were collected with a hoe, discarding the upper 5-cm top soil profile, from 5 to 40 cm depth in the close vicinity of active roots from 2 to 5 olive trees randomly chosen in each from 146 orchards
Soil samples were collected from the rhizosphere of individual 36 wild olives distributed in various areas
Summary
28S rRNA, Detection, New geographic record, ITS. Olive (Olea europaea subsp. europaea L.) is the most common crop on the island of Crete, Greece, while clusters of wild olives (Olea europaea subsp. sylvestris L.) are located in several non-agricultural areas (Tzortzakakis et al, 2014). Europaea L.) is the most common crop on the island of Crete, Greece, while clusters of wild olives Surveys for detection of plant-parasitic nematodes were conducted on both cultivated and wild olives during the period 2013 to 2015. Soil samples were collected from the rhizosphere of individual 36 wild olives distributed in various areas. Three additional soil samples, where populations of Helicotylenchus were detected, were included in this study. One sample was from pots where cultivated olive stock plants were maintained for research purposes (Institute of Olive Tree, Subtropical Crops, and Viticulture, Chania, Crete), the second from the roots of walnut (Juglans regia L.) in Evia, Greece, and the third from the roots of goji berry (Lycium barbarum L.) in Thessaly, Greece. First Report of Bitylenchus hispaniensis, Pratylenchoides alkani, and Helicotylenchus vulgaris
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