Pythium Root Rot of Flue-Cured Tobacco Seedlings Produced in Greenhouses: Factors Associated with its Occurrence and Chemical Control

Fig. 4. Disease progress curves. Dotted line represents P. volutum (Pm), solid line represents P. myriotylum (Pm), ♦ = inoculation at 14 days, ● = inoculation at 21 days, and ■ = inoculation at 28 days after seeding. ○ = nontreated control. Root rot incidence was evaluated for three weeks after the inoculation. Incidence was compared within an evaluation date. Means within the same date followed by the same letter are not significantly different according to Fisher’s least significant difference (LSD) test, P ≤ 0.05.



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Pythium Root Rot of Flue-Cured Tobacco Seedlings Produced in Greenhouses: Factors Associated with its Occurrence and Chemical Control