Extreme heat during bud differentiation can lead to double cherries or spurs, where one side of the cherry is aborted. Photo by Tim Smith, WSU Extension Cherry doubling is a sporadic problem but one that costs the Pacific Northwest cherry industry millions of dollars when it happens. Doubled cherries, which are usually treated as culls, form when the flower buds are damaged by excessive summer heat. Tim Smith, Washington State University Extension educator for north central Washington, told growers during Stone Fruit Day that misinformation has been circulated about doubling. It is not caused by chemical sprays, such as dimethoate, after […]