Reproduction of Globodera tabacum solanacearum in seven flue-cured tobacco-producing soils

The tobacco cyst nematode (Globodera tabacum solanacearum) continues to pos e a serious threat to flue-cured tobacco production in Virginia and nearby states. Soils were sampled from five uninfested and two infested flue-cured tobacco-producing locations. Twenty-three edaphic factors were characteriz ed to determine if any were correlated with G. t. solanacearum reproduction . Comparisons were also made between pasteurized and natural soils to deter mine if biological suppression of G. t. solanacearum reproduction might be occurring in currently uninfested areas. Differences in G. t. solanacearum reproduction were noted among the soils, but results were inconsistent acro ss the three trials conducted in this study. Only soil pH correlated signif icantly with nematode reproduction, and then only in one of three trials. G lobodera tabacum solanacearum reproduced with similar efficiency in natural and pasteurized soils.