TECHNOLOGY FOCUS - AGRICULTURE - Preferred Method: The time lag between the application of compounds (A) and (B) is at least 8 days. The compound B is applied together with at least one nitrification inhibitor (compound C) including 2-(3,4-dimethyl-pyrazol-1-yl)-succinic acid, 3,4-dimethylpyrazole phosphate, dicyandiamide, 1H-1,2,4-triazole, 3-methylpyrazole, 2-chloro-6-(trichloromethyl)-pyridine, 5-ethoxy-3-trichloromethyl-1,2,4-thiadiazole, 2-amino-4-chloro-6-methylpyrimidine, 2-mercaptobenzothiazole, 2-sulfanilamidothiazole, thiourea, sodium azide, potassium azide, 1-hydroxypyrazole, 2-methyl pyrazole-1-carboxamide, 4-amino-1,2,4-triazole, 3-mercapto-1,2,4-triazole, 2,4-diamino-6-trichloromethyl-5-triazine, carbon bisulfide, ammonium thiosulfate, sodium trithiocarbonate, 2,3-dihydro-2,2-dimethyl-7-benzofuranol methylcarbamate or N-(2,6-dimethylphenyl)-N-(methoxyacetyl)-alanine methyl ester. The two compounds (A) comprising pyraclostrobin, azoxystrobin, trifloxystrobin, epoxiconazole, metconazole, metrafenone, fluxapyroxad, boscalid, bixafen, isopyrazam, penthiopyrad, fluopyram and fenpropimorph are applied. The agrochemical mixture comprising pyraclostrobin and boscalid are applied as compound (A). The compound (A) is applied: as seed treatment; or as foliar and/or in furrow application, where the application of compound (A) is repeatedly carried out. Preferred Components: The strobilurin is pyraclostrobin (preferred), orysastrobin, azoxystrobin, dimoxystrobin, enestroburin, fluoxastrobin, kresoxim-methyl, metominostrobin, picoxystrobin, pyribencarb or trifloxystrobin. The carboxanilide is boscalid, fluxapyroxad (both preferred), bixafen, fluopyram, isopyrazam, penthiopyrad and sedaxane. The treated plant includes agricultural, silvicultural, ornamental or horticultural plants, each in its natural or genetically modified form, where the plant is wheat, barley, oat, rye, soybean, corn, oilseed rape, canola, sunflower, cotton, sugar cane, sugar beet, rice or Sorghum. EXAMPLE - No suitable example given.