Influence of thiophanate-methyl and zinc on the development of lettuce ring necrosis disease and its vector Olpidium brassicae in NFT (nutrient film technique) grown lettuce

action des pesticides belgique belgium carbendazim carbendazima carbendazime chemical control control de enfermedades cultivos de invernadero culture sur film nutritif disease control essai greenhouse crops inoculation inoculation methods lactuca sativa lutte chimique nutrient film technique olpidium pesticide actions plante de serre pruebas sulfate de zinc sulfato de cinc symptome symptoms trials virose viroses virosis zinc sulphate