The influence of temperature on the hatching activity and lipid utilization of second stage juveniles of the potato cyst nematodes Globodera rostochiensis and G. pallida

SUMMARY The hatching and persistence of eight populations of Globodera rostochiensis and G. pallida were examined at six different temperatures. Interspecific comparison showed that G. pallida had a much slower initial rate of hatch and utilized its lipid reserves more slowly than G. rostochiensis. There was no difference between activity coefficients of the species at each temperature but the results do suggest that G. pallida is the species better adapted to hatch at lower temperatures. The results are discussed in relation to the effects of these factors on competition between the two species.