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Título : Impact of nutritional deficiency on Yellow Sigatoka of banana
Autor: Freitas, A. S.
Pozza, Edson Ampélio
Pozza, Adélia Aziz Alexandre
Oliveira, M. G. F.
Silva, H. R.
Palavras-chave: Mycosphaerella musicola
Musa spp
Mineral nutrition
Publicador: Springer
Data da publicação: 25-Mai-2016
Referência: FREITAS, A. S. et al. Impact of nutritional deficiency on Yellow Sigatoka of banana. Australasian Plant Pathology, [S.l.], v. 44, n. 5, p. 583-590, Sept. 2015.
Abstract: The objective of this work was to assess the incidence of Yellow Sigatoka in banana plants cultivated with deficiencies of nitrogen, phosphorus, potassium, calcium, magnesium, sulfur or boron. The experimental design was a randomized complete block with 8 treatments, 4 repetitions and 1 plant per repetition. The treatments were supplied in solution culture and consisted of all the nutrients (control) or nitrogen (N), phosphorus (P), potassium (K), calcium (Ca), magnesium (Mg), sulphur (S) or boron (B) deficiency. Leaves 1 and 2 were inoculated on the abaxial surface with a suspension of conidia and assessed every 5 days to with a total of 5 assessments. The average number of lesions were integrated for the area under the disease progress curve (AUDPC). The greatest AUDPC occurred in plants deficient in K, N, P, S, or Mg. Plants deficient in N, P, K, Ca, Mg, S or B had lower leaf contents of these nutrients and showed morphological changes expressed in visual deficiency symptoms. Thus, banana plants deficient in K, N, P, S or Mg had a greater incidence of Yellow Sigatoka, compared with plants with full nutrients and plants deficient Ca or B.
Idioma: en_US
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