Responses of Italian populations of Globodera rostochiensis and G. pallida to hatching agents

G. Russo, N. Greco

Abstract


An investigation was conducted to assess the hatching response of Italian populations of the cyst nematodes, Globodera rostochiensis and G. pallida, to potato root diffusate, picrolonic acid and sodium metavanadate, in comparison with distilled water, at 20 ± 2 °C. Almost no eggs hatched after six weeks incubation of cysts of either species in distilled water. In potato root diffusate, 23% of the eggs of G. rostochiensis and 41% of those of G. pallida hatched in the first week and 47.4% and 55.7%, respectively, in six weeks. After nine weeks, egg hatch in picrolonic acid was 60.9% for G. rostochiensis and only 0.9% for G. pallida. In sodium metavanadate the cumulative hatching after six weeks was 31.9% for G. rostochiensis and 10.4% for G. pallida.

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