METHOD: Reproductive Efficiency CONDITIONS: Green House and Field METHOD NARR: Tests of tuber resistance and reproductive efficiency to M. chitwoodi races 1 & 2, and M. hapla, were performed in microplots of 19L volume buckets pa. These micro plots were inoculated with 25,000 eggs and allowed to grow for 90-135 days until harvest. Egg counts were made and tuber damage was rated. Additionally, tests for reproductive efficiency were carried out in tTION: Analysis of the hybrids makes it appear that resistance to race 1 is inherited in a discrete fashion. Resistance appears to be a dominant character.