Public sector plant breeding produces one tough potato Robert Plaisted, Cornell University professor emeritus of plant breeding, and his colleagues, Bill Brodieand William Fry, professors in Cornell's plant pathology department, have just introduced a new potato New York 121. This small white potato is able to fend off late blight (the fungus P. Infestans, of "Irishpotato-famine" fame) as well as both races of golden nematodes, scab and potato virus Y (PVY).