Two women who broke into CSIRO and destroyed a research crop of genetically-modified wheat with whipper-snippers have cost Greenpeace more than $280,000, a court has heard. And the ACT Supreme Court heard the women should be given a jail sentence for the publicity stunt in July last year. NSW women Jessa Latona, 35, and Heather McCabe, 48, pleaded guilty to one charge of damaging or destroying Commonwealth property. Latona and McCabe, both volunteers with the conservation group Greenpeace, scaled fences to break into a CSIRO farm at Ginninderra on July 14 last year. They filmed themselves vandalising a trial crop of wheat which had been genetically engineered to increase its nutritional value.