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Factors Affecting Egg Hatch of Heterodera mediterranea and Differential Responses of Olive Cultivars to Infestation

AuthorsVovlas, Nicola; Castillo, Pablo
Olea europaea
Olive cyst nematode
Root exudates
Issue DateJun-2002
PublisherSociety of Nematologists
CitationJournal of Nematology 34, 146-150.
AbstractThe influence of temperature and olive root exudates on Heterodera mediterranea egg hatch and the effects of H. mediterranea on the growth of two olive cultivars (Arbequina and Picual) were investigated. Egg hatch occurred over a temperature range of 10 to 30ºC and was optimal at 20 to 25ºC. There were no differences in egg hatch between sterile deionized distilled water or root exudate dilutions (undiluted, diluted 1:1, and 1:2) of Arbequina and Picual at 20ºC. Heterodera mediterranea reproduced on both olive cultivars in growth chambers at 25ºC. Soil and root final nematode populations, as well as total number of cysts per plant and reproduction rate, were significantly higher in Arbequina than in Picual. Shoot dry and root fresh weights as well as increases of shoot height, trunk diameter, and numbers of nodes were significantly suppressed by infection with 10,000 eggs + second-stage juveniles/pot in Arbequina but not in Picual.
Publisher version (URL)http://fulltext10.fcla.edu/DLData/SN/SN0022300X/0034_002/146.pdf
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