An interactive computer program, written in Fortran as implemented on a microcomputer, was designed to do rank analysis. The program minimizes the time involvement in the determination of rank analyses and thus facilitates the study of rank responses. Although the system still included manual typing of the raw ranks into the microcomputer, the calculations of rank totals and subsequent rank analysis to determine significant differences among the ranks was performed much faster than an analogous manual handling of the same data.
Progenies from 48 small-fruited Malus species and cultivars were tested for heritable, high-level resistance to powdery mildew [Podosphaera leucotricha (Ell. & Ev.) Salm.]. Six-week-old seedlings from controlled crosses and open pollination were inoculated by dusting with conidia in the greenhouse. ‘David’, ‘White Angel’, M. × robusta (Robusta 5), M. × robusta ‘Korea’, and an unnamed selection M. × robusta (24-7-7,8) all produced some seedlings in their progenies that remained free of infection after inoculation. The mode of inheritance of resistance was not clear.
‘Kristin’ is a new, mid-season, productive, large, black, high-quality sweet cherry (Prunus avium L.). It is similar to ‘Schmidt’, but trees are more winter-hardy more heavily cropping, and fruits are larger. It has performed especially well in tests in Norway, Montana, and New York.
‘Liberty,’ which was tested under the number NY55140-19 is a good quality red apple that can be grown without fungicidal sprays in New York State (3). It is highly resistant to Venturia inaequalis (Cke.) Wint., apple scab, and to Gymnosporangium juniperivirginianae (Schw.), cedar apple rust and resistant to Podosphaera leucotricha (E. & E) Salm, apple powdery mildew, and Erwinia amylovora (Burrill) Bergey et al, fire blight.