Almond Leafout Failure Seems Related to Wet Springs
“The issue and Monterey has been observed for many, many years,” said Milliron. And he's looked through the farm advisor communication archives. “There was reference to it before 1999. And most recently it was seen 2000, 2006, 2010, and then really not until 2017, 2018, and obviously this year. So it's interesting that we really didn't see it during the drought years,” he noted.
“Bruce Lampinen, UC Davis Department of Plant Sciences certainly thinks that we're seeing this in years following a really wet year. So obviously we see in 2018 and 2020, and we know that 2017 and 2019 were really wet springs,” Milliron explained.
“So, perhaps the root zone had some problems that predisposed it to late season stress last year, and then that may have queued it up for problems depending on what kind of winter weather we had. But still the leaf out problem on certain varieties definitely remains a mystery,” he said.