These plants were then planted in a field infected by stem nematodes at a density of 300 nematodes per 100 g soil and their stem nematode resistance was evaluated for 2 years according to the method of
These plants were thenplanted in a field infected by stem nematodes at a density of 300nematodes per 100 g soil and their stem nematode resistance wasevaluated for 2 years according to the method of