From Star-K via Kashrut.com (though I can’t find the quoted source at Star-K.)
April 27, 2017 – from the Star-K:
Due to heightened infestation issues, the availability of STAR-K certified iceberg from Dole is going to decrease for at least the next few weeks. Many bags will not bear the STAR-K symbol and they are NOT certified. Please advise your Kehillos and constituents to please check each and every bag for the STAR-K symbol.
Cabbage/cole slaw mixes seem to be fine, at least for the time being, but we are monitoring them closely as well and the status may also be subject to sudden change.