Incipient Resistance of Helicoverpa punctigera to the Cry2Ab Bt Toxin in Bollgard II® Cotton Downes, Sharon ; Parker, Tracey ; Mahon, Rod Abstract Publication: PLoS ONE Pub Date: September 2010 DOI: 10.1371/journal.pone.0012567 Bibcode: 2010PLoSO...512567D