In a preliminary trial with 300 nL L−1 1-MCP, stem end gray mold of d’Anjou pear fruit was significantly reduced from 5.4% in the control to 0.8% (R. Spotts, unpublished). Later,we showed
that d’Anjou fruit treated with 50 and 300 nL L−1 1-MCP did not develop superficial scald but also failed to ripen normally. Fruit treated with 10 and 20 nL L−1 1-MCP developed unacceptable
scald but ripened normally (Chen and Spotts, 2005).No in-depth studies have been done to examine the effectsof the combination of 1-MCP and hexanal on decay of pear fruit.