Diseases 117
10.6 Powdery Mildew
This disease is caused by Oidium caricae (imperfect state, Erysiphe cruciferarum)
often affects papaya plants and fruits serious in the humid tropics. Sometimes, other
species of fungus, Golovinomyces cichoracearum, Oidiopsis sicula, O. caricae, O.
caricae-papayae, O. caricicola, O. indicum, O. papayae, Ovulariopsis papayae,
P. caricae-papayae, P. macularis, P. xanthii and Streptopodium caricae were also
reported to infect papaya from Taiwan (Tsay et al. 2011). The development of powdery
FIGURE 10.4 (See colour insert.) (a) Root tip, (b) root rot initial stage and (c) later stage.
FIGURE 10.5 Recovery of plant after treatment.