The effect of the treatments (inoculation and soil type) on number of leaves per plant, pseudostem girth, area of the third leaf and leaf chlorophyll content, external disease severity score (AUDPC
), internal disease severity (arcsine-transformed) and biomass was analysed by factorial analysis of variance (n = 72) and Tukey post-hoc analysis.
The area under the disease progress curve (AUDPC
) was calculated for each accession using the midpoint rule method (Campell and Madden, 1990) as shown in Equation 1.
Based on the mildew severity data on melon plant, of the area under the disease progress curve (AUDPC
)was calculated and, after statistical analysis, it was confirmed that there was no significative interaction among fertilization, the cultivars and the areas of study for this variable.
and productivity data were first tested for normal distribution of the experimental error with the Kolmogorov-Smirnov test, at a 5% probability level.
= [n-1.summation over (i-1)] 0.5 ([x.sub.i+1] + [x.sub.i]) ([t.sub.i+1] - [t.sub.i]), (2)
Per cent disease index (PDI) and area under disease progress curve (AUDPC
), the components of blighting, were calculated to identify slow blighting genotypes.
Disease reduction (DR) (%) = (AUDPC
in positive control - AUDPC
in treatment) x 100%/AUDPC in positive control
Tables 2 and 3 show the percentage inhibition of diameter growth (PIDG), daily growth rate (TX) and area under the disease progress curve (AUDPC
Hence, as per our findings, lines showing low frequency of disease severity with lower AUDPC
values could be considered as slow rusting lines carrying durable rust resistance against Lr34, Lr46 and Sr2 virulences, which can be utilized in breeding programs.
= [n-1.summation over (i=1)] ([OS.sub.i] + [OS.sub.i+1]/2]([t.sub.i+1] - [t.sub.i]) (2)