** Shares of Select Harvests SHV.AX fall as much as 20.2% to A$4.320, lowest level since January 8

** Stock set for worst day since May 2011, if losses hold

** Almond grower forecasts a 2025 crop production in the range of 24,000 to 26,500 metric tons, down from 29,527 metric tons for 2024

** Says about 500 metric tons of crop was lost due to frost

** About 622,200 shares change hands vs the 30-day average of around 501,099

** Stock last down 13.1%, trimming YTD gains to 10.6%

(Reporting by Aaditya Govind Rao in Bengaluru)

((Aaditya.govindrao@thomsonreuters.com;))