The entomopathogenic fungus Metarhizium robertsii and its endophytic potential in grapevine to regulate radicicole grape phylloxera populations

Grape phylloxera (GP) (Daktulosphaira vitifoliae Fitch, 1855) devastated European vineyards in the 19th century by attacking Vitis vinifera roots. Today, grafting onto resistant American rootstocks remains its primary control strategy, but GP continues to threaten non-grafted vineyards, prompting the search for alternative control solutions.