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概要
Survey of Plant-Parasitic Nematode Genera Associated with Potato Plants at Dakahlia Governorate, Egypt
Gad SB, El-Sherif AG and Osman MA
A survey was conducted to determine the types, frequency and population of plant parasitic nematode genera associated with the soils and roots from the rhizosphere of potato cultivars i.e. Spunta, Cilany, Cara and Shamcya, during the growing season of 2016. Three hundred composite soil samples were randomly collected where a modified Baermann technique for plant parasitic nematode extraction was applied. Potato crop grown within four counties belong to Dakahlia governorate i.e. Manzala, Gamalia, meet salsyel and Kordy revealed the presence of ten nematode genera i.e. Criconemoides, Helicotylenchus, Heterodera, longidorus, Meloidogyne, Pratylenchus, Rotylenchulus, Tylenchoryhnchus, Xiphinema and Tylenchus that were found to be the most prevalent nematode genera in the surveyed counties. The two soil types, sandy loam and loamy soils have the highest number of nematode genera (10) with total occurrence of 126 and 166 times, respectively. Meloidogyne (J2s) was considered as the widely distributed pest of the potato crop as it was associated with four potato cultivars within all survey regions.