The infection of the potato tuber moth P. opercullella with entomopathogenic fungi and nematode-parasitic fungi. (I), Arrow with "a" was the eggs of potato tuber moth P. opercullella. Arrow with "b" was the selected fungal strains. Strains A-I have been described in Figure 4. Each fungal culture is 6 mm in diameter. For the negative control (I-I) showed that all of the juveniles had hatched within 1 week. (II), Although the bioassay lasted for 1 week, the infection rate up to highest after 5 days later, so we only show the infection rate of 3-5 days. The infection rate of eight tested entomopathogenic or nematode-parasitic fungi ranged from 80% to 100%. The phytopathogenic fungus N. oryzae (II-I) that used as the negative control did not show any infection toward the eggs and the juveniles were all hatched into juveniles within 5 days, so the infection rate was zero.