highly significantp < 0.001
Compared with the solvent control + juglone (12.07 ± 4.1%), the CH 50 μg/ml, CH 100 μg/ml and CH 200 μg/ml groups presented highly significant survival rates of 73.98 ± 2.8%, 83.87 ± 4.3% and 72.15 ± 2.8%, respectively (*** p < 0.001) (Fig. 1 a).