Evaluation of fungicide programs to manage brown rot and Rhizopus rot on peach and nectarine, 2011.

摘要

Fungicide programs intended for control of brown rot and Rhizopus rots on Easternglo nectarine and Sweet Dream and Beekman peach trees were evaluated at the Perm State Fruit Research & Extension Center (FREC). The experimental design was a four replicate split-plot arrangement with treatment and cultivar assigned to main-plots and sub-plots, respectively. Sub-plot treatments consisted of single trees of each cultivar. Treatments were applied with a boom sprayer (100 gal/A spray volume at 400 psi) oneach side of the tree. Two bloom applications at 20-50% bloom (Bl) and at 50-80% (B2) bloom were made on 19 Apr and 25 Apr. Preharvest (PH) and harvest applications (H) sprays were made on 11 Jul and 21 Jul for Easternglo; 5 Aug (PH for Sweet Dream), 19Aug (H for Sweet Dream and, PH for Beekman), and 22 Aug (H) for Beekman. Maintenance sprays for other diseases and insects were applied to all treatments from petal fall through the cover sprays with an airblast sprayer (100 gal/A spray volume at 400 psi). There was no blossom blight observed after bloom. At maturity, 50 fruits were harvested from each plot for assessments. Fruits were harvested on 22 Jul (Easternglo), 19 Aug (Sweet Dream) and 22 Aug (Beekman) and placed on fiber produce trays and incubated in a temperature-controlled room at 72° F. Brown rot and Rhizopus rot were assessed at 0, 3, and 7 days after harvest incubation (DAI). Data obtained was analyzed by analysis of variance and significance between means tested with Fisher's ProtectedLSD test at a = 0.05. (SAS Institute Inc., Cary, NC).