Observations on the population dynamics of Globodera pallida under single and double cropping conditions

SUMMARY The population dynamics of Globodera pallida were studied on susceptible potato plants. Oxamyl treated and untreated plots were planted with a G. pallida susceptible crop, from the first early maturity class, under polythene at the end of February and immediately followed, after harvest in June, by a susceptible second crop. Other nematicide treated and untreated plots were sown in April with a G. pallida susceptible cultivar. The results were variable but showed that reproduction of G. pallida under double cropping conditions was greater than on a single main crop.