Pierre Cammalletti, technical manager for the controlled Mycorrhization program, shows a Tuber magnatum Pico (white truffle) in the laboratory of Robin's nursery in Saint-Laurent-du-Cros near Gap, southeastern France, Feb. 25, 2021. After more than 20 years of research, a nursery in the Hautes-Alpes has succeeded in control the cycle of white truffles, which are as expensive as they are difficult to produce. (Photo/Agencies)
Claire Cotton, technician for the controlled Mycorrhization program, a culture of tuber magnatum pico strain in the laboratory of Robin's nursery in Saint-Laurent-du-Cros near Gap, southeastern France, Feb.25, 2021. After more than 20 years of research, a nursery in the Hautes-Alpes has succeeded in control the cycle of white truffles, which are as expensive as they are difficult to produce. (Photo/Agencies)
Pierre Cammalletti, technical director for the controlled Mycorrhization program looks with a microscope at the spores of tuber magnatum implanted on a truffle oak in the laboratory of Robin's nursery in Saint-Laurent-du-Cros near Gap, southeastern France, Feb.25, 2021. After more than 20 years of research, a nursery in the Hautes-Alpes has succeeded in control the cycle of white truffles, which are as expensive as they are difficult to produce. (Photo/Agencies)
Bruno Robin, manager of "Robin pepinieres" carries quercus pubescens truffle mycorrhize with tuber magnatum at Robin plant nursery in Sisteron, southeastern France, February 25, 2021. After more than 20 years of research, a nursery in the Hautes-Alpes has succeeded in control the cycle of white truffles, which are as expensive as they are difficult to produce. (Photo/Agencies)
