From left to right, the trees are a blight-susceptible wild-type American chestnut (C. dentata) called Ellis 1, a blight-resistant Chinese chestnut (C. mollissima) tree called 'Qing,' and two ...

Controlled inoculations of chestnut stems with the blight fungus have confirmed that Darling trees with OxO have consistently smaller cankers than their non-transgenic relatives. View time-lapse video ...