Start Date
28-8-2017 8:45 AM
End Date
28-8-2017 9:00 AM
Description
Abstract:
Replicated trials were conducted on cranberry beds with high levels of fruit rotting pathogens to assess fungicide effects on field rot, storage rot and yield. There was considerable variability between years, experiments and fungicide treatments. A few patterns emerged. Chlorothalonil applied early to mid-bloom consistently increased yield of marketable fruit (22 ± 9%) and reduced fruit rot (46 ± 8.6%). Similar patterns in fruit rot reduction were noted with combinations of azoxystrobin and prothioconazole and other combinations of groups 11 and 3 fungicides applied during bloom, but the effects on yield were less consistent. In multiple trials comparing the efficacy of single commercial fungicides applied during bloom, carboxamide + fluopyram, prothioconazole, and chlorothalonil all consistently increased yield and reduced fruit rot.
Field and storage rot were assessed in decade-long variety trials in Oregon and Washington. Trials in Washington were fungicide-free. Crimson Queen, Scarlet Knight and BG’s had consistently higher field and storage rot than other new releases and standard comparisons.
2015 and 2016 packout data (% poor, 3 and 6 week keeping quality) from Washington’s fresh fruit growers was analyzed as a function of growers’ fungicide programs. Pre-bloom applications appear to have had little impact on fruit rot. Beds with 5-6 in-bloom fungicides had better quality fruit than beds with fewer fungicide applications. Prothioconazole was the most effective in-bloom fungicide. Post-bloom chlorothalonil applications improved fruit quality.
Recommended Citation
Patten, Kim; Metzger, Chase; and Bellamy, David, "Cranberry field rot, storage rot, fresh fruit keeping quality and yield in Washington as a function of variety, type of fungicide(s) applied, and the number and timing of applications" (2017). North American Cranberry Researcher and Extension Workers Conference. 3.
https://scholarworks.umass.edu/nacrew/2017/papers/3
Included in
Cranberry field rot, storage rot, fresh fruit keeping quality and yield in Washington as a function of variety, type of fungicide(s) applied, and the number and timing of applications
Abstract:
Replicated trials were conducted on cranberry beds with high levels of fruit rotting pathogens to assess fungicide effects on field rot, storage rot and yield. There was considerable variability between years, experiments and fungicide treatments. A few patterns emerged. Chlorothalonil applied early to mid-bloom consistently increased yield of marketable fruit (22 ± 9%) and reduced fruit rot (46 ± 8.6%). Similar patterns in fruit rot reduction were noted with combinations of azoxystrobin and prothioconazole and other combinations of groups 11 and 3 fungicides applied during bloom, but the effects on yield were less consistent. In multiple trials comparing the efficacy of single commercial fungicides applied during bloom, carboxamide + fluopyram, prothioconazole, and chlorothalonil all consistently increased yield and reduced fruit rot.
Field and storage rot were assessed in decade-long variety trials in Oregon and Washington. Trials in Washington were fungicide-free. Crimson Queen, Scarlet Knight and BG’s had consistently higher field and storage rot than other new releases and standard comparisons.
2015 and 2016 packout data (% poor, 3 and 6 week keeping quality) from Washington’s fresh fruit growers was analyzed as a function of growers’ fungicide programs. Pre-bloom applications appear to have had little impact on fruit rot. Beds with 5-6 in-bloom fungicides had better quality fruit than beds with fewer fungicide applications. Prothioconazole was the most effective in-bloom fungicide. Post-bloom chlorothalonil applications improved fruit quality.