Influence of Harvest Date on Bull’s Eye Rot of ‘Cripps Pink’ Apple and Control Chemical Strategies

• DOI: 10.1094/pdis-05-16-0615-re
• Publication Date: 2016-07-08T14:02:17Z
• Authors: Irene Cameldi; Fiorella Neri; Daria Ventrucci; Gianni Ceredi; Enrico Muzzi; Marta Mari
• Keywords: Preharvest; Fludioxonil; Fruit rot

The influence of four different harvest times on the bull's eye rot 'Cripps Pink' apple caused by Neofabraea spp. was investigated in two orchards harvested at times. In addition, a control strategy based chemical treatments performed preharvest or postharvest evaluated. Regression analysis between time and disease incidence revealed high r2 values (>0.75). All fungicide significantly (P < 0.0085) reduced incidence; however, thiophanate-methyl (achieving >87% control) more effective than mixture pyraclostrobin boscalid (<80.7%) fludioxonil (<57.6%), all trials. Compared with nontreated fruit, treatment ethylene inhibitor 1-methylcyclopropene (1-MCP) halved infection three experiments. However, combination plus one 1-MPC suppressed to 0.00001) greater degree >87.5% single (<65%) 1-MCP (<80%) tested alone.