Figure 4

Nematode mortality under different urea concentrations. (a), nematode mortality under different concentrations of urea alone; (b), Nematode mortality of Arthrobotrys oligospora and Dactylellina ellipsospora under different urea concentrations. Values are the mean ± SD (n = 5). The lowercase and uppercase letters indicate significant differences among different urea concentrations combined with Arthrobotrys oligospora and Dactylellina ellipsospora, respectively.