Hatching and development of five populations of potato cyst-nematodes (two of G. rostochiensis and three of G. pallida) were studied at different temperatures. There were no fundamental differences between British and Peruvian populations but a Peruvian population (from Otuzco) seemed well adapted to a wide range of temperatures. G. pallida populations hatched and reproduced more at lower temperatures than G. rostochiensis populations, but G. rostochiensis was more successful than G. pallida at temperatures above 20°.
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Javier Franco (1979) studied this question.