** Shares of agricultural biotech co RKDA.O fall 21.2% to
$1.49 premarket, among top losers across U.S. exchanges
** RKDA's Q4 sales fell to $2.2 mln from $7.1 mln a year
earlier when co had recorded one-time license revenue from its
deal with Bioceres urn:newsml:reuters.com:*:nPn5wvW5za
** Net loss widened to $9.3 mln from $8.9 mln, hurt by
impairment charges and higher costs
** Up to Wednesday's close, stock had risen ~81% YTD
(Reporting by Manas Mishra)
((Manas.Mishra@thomsonreuters.com;
www.twitter.com/Manaswrites15))