Interaction of stem rust (Puccinia graminis) and winter wheat in varietal mixtures
1996
Vechet, L. (Vyzkumny Ustav Rostlinne Vyroby, Prague-Ruzyne (Czech Republic))
The development of stem rust (the race 11) on two components varietal mixtures (the middle resistant Sparta and the middle susceptible Regina) was evaluated on small plot trials. From epidemiological parameters were evaluated a number of affected plants, infection type, disease severity and AUDPC. The mixtures of varieties mainly one with 75 % proportion of middle resistant variety provided significant reducing of the disease. The level of epidemic in mixtures of varieties with 75 and 50 % proportion of the resistant variety approached the level of the middle resistant variety. The mixture with 75 % proportion of the middle susceptible variety had diseased the same number of ears as the variety in the pure stand.
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