The use of area under disease progress curve (AUDPC) for wheat mildew resistance assessment at various nutrition variants
1994
Stojanovic, J. | Stojanovic, S. (Institut za istrazivanja u poljoprivredi "Srbija", Kragujevac (Yugoslavia). Centar za strna zita)
Powdery mildew severity on six wheat cultivars differing in susceptibility, was determined using a pot experiment. Five variants of nutrition were used. In stage 5 the plants from three pots of each cultivar and variant of nutrition were inoculated with a mixture of prevalent genotypes of parasite, and three pots were treated with Bayfidan EC 250. The results show that the assessment in the flowering stage was not reliable enough for expressing the exact differences in cultivar susceptibility and predicting yield loss. There was a significant positive correlation excessive between AUDPC and yield loss. Also, nitrogen amounts and insufficient potassium amounts provoked higher AUDPC values. Insufficient nitrogen and phosphorus amounts lower the values of AUDPC compared with the optimal nutrition variant. Lower AUDPC values were the result of less favourable conditions for disease development in 1992 compared with 1991.
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