Tag Archives: Peronospora destructor

147-150 V. Bulovienė and E. Survilienė
Effect of environmental conditions and inocolum concentration on sporulation of Peronospora destructor
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Effect of environmental conditions and inocolum concentration on sporulation of Peronospora destructor

V. Bulovienė and E. Survilienė

Lithuanian Institute of Horticulture, Kauno str. 30, LT - 54333 Babtai, Kaunas distr.,Lithuania; e-mail: v.bandzeviciute@lsdi.lt

Abstract:

The effect of inoculum concentration, incubation time, relative humidity (RH) and temperature on sporulation of Peronospora destructor on onion leaves was analyzed under controlled environmental conditions in a greenhouse. The shortest period for spore germination and sporulation was on onion leaves inoculated with 106 spores/ml distilled water suspension. The intensity of infection and the sporulation of infected plants were affected greatly by the time and temperature of incubation. Exposure of inoculated plants at 15°C for 8 days and then at 22°C for 5 days resulted in the percentage of infection and the most abundant sporulation. Results of this experiment indicated that the period of P. destructor sporulation on one plant lasted 4–8 days.

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