Relationship between LAI and nematode density.

<p>A cubic regression curve is fitted for the relationship for the cultivars Gonja (•) and Mbwazirume (▪) between LAI and mean nematode density for values within one of up to five nematode density classes (0; 1–<1,000; 1,000–<10,000; 10,000–<100,000 and 100,000 or more/100 g roots) for two harvests for both plants to which nematodes were and were not added prior to planting. All nematode density classes for which there is significant percentage reduction in LAI relative to when no nematodes were recovered from roots is shown for both cultivars (*–P<0.05; ***–P<0.001, Oneway Anova with <i>apriori</i> contrasts). The values in parenthesis are the number of values associated with each mean; (n), Gonja and [n] Mbwazirume.