Interaction between root-rot pathogen of peanuts Rhizoctonia solani (Corticium solani) and Sclerotium rolfsii and inoculation with Rhizobium sp. on dry weight of plants and nodulation

Abstract

Inoculation with Rhizobium sp. increased the numbers, dry weight and size of nodules, also the dry weight of plants and the percentage of nitrogen per plant. Organic manuring gave similar results. Nitrogen fertilization increased the numbers, dry weight, size of nodules and dry weight and the percentage of nitrogen of plants, except 150 kg ammonium sulfate per feddan. Soil infestation with each of Rhizoctonia solani or Sclerotium rolfsii or both of them decreased the percentage of total nitrogen of the plants and on the other hand reduced the numbers, fresh and dry weights of nodules and fresh and dry weights of roots and shoots of the plants. Inoculation with Rhizobium sp. in soil infested with the aforementioned fungi increased the numbers, fresh and dry weights of nodules and also increased the fresh and dry weights of plants and the percentage of total nitrogen of plants. Bodeninfektion mit Rhizoctonia solani (Corticium solani) setzte Zahl, Trockengewicht, Knöllchengröße sowie den Stickstoffgehalt und Trockensubstanzgehalt der Erdnußpflanze herab. Das Gegenteil war der Fall bei Beimpfung mit Rhizobium sp., organischer und Ammonsulfatdüngung [ausgenommen 150 kg (NH 4 ) 2 SO 4 /feddan]. Auch in Kombination mit Rhizoctonia solani und Sclerotium rolfsii erhöhte Rhizobium sp. die genannten Prüffaktoren gegenüber den nicht infizierten Varianten.