A biologist shows a plastic box containing pinewood nematodes (Bursaphelenchus xylophilus), microscopic worms attacking conifers, breeding on botrytis cinerea fungus (R) and a box of botrytis cinerea fungus free of nematodes (L) at a laboratory of the Institut national de recherche pour l'agriculture, l'alimentation et l'environnement (INRAE) in Villenave-d'Ornon, outside Bordeaux, on September 9, 2026. (Photo by Christophe ARCHAMBAULT / AFP via Getty Images)