Some factors affecting the pathogenicity of Diplodia tubericola (Ell. and Ev.) Taubenh. on sweet potato [Ipomoea batatas] root [Philippines]

Sardsud, V.; Divinagracia, G.G.

Some factors affecting the pathogenicity of Diplodia tubericola (Ell. and Ev.) Taubenh. on sweet potato [Ipomoea batatas] root [Philippines]

1986

Sardsud, V. | Divinagracia, G.G.

Moist chamber was needed for disease development. Incubation for 48 hours in moist chambers and exposure under room condition for 24 hours was recommended for disease induction. Disease development was favored at 30 degrees C. The storage roots became more susceptible when inoculated at 6 or more days after harvest than when they were newly harvested or at 3 days after harvest. Injured surface of storage roots inoculated 3 days or more after harvest formed wound periderm which protected the healthy tissues from mycelial penetration

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