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Foliar fertilizers for the management of phoma leaf spot on coffee seedlings
Author(s) -
Silva Júnior Manoel Batista da,
Pozza Edson A.,
Resende Mário L. V.,
Júnior Pedro M. R.,
Costa Bruno H. G.,
Carvalho Camila A.,
Resende Alexandre R. M.,
Botelho Deila Magna dos Santos
Publication year - 2018
Publication title -
journal of phytopathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 60
eISSN - 1439-0434
pISSN - 0931-1785
DOI - 10.1111/jph.12745
Subject(s) - fungicide , phoma , biology , phenylalanine ammonia lyase , horticulture , fertilizer , leaf spot , agronomy , lignin , disease control , disease management , botany , phenylalanine , microbiology and biotechnology , biochemistry , amino acid , systematic review , medline
The growing demand for alternative strategies for plant disease management has sought a reduction in the use of fungicides via the employment of resistance inducers and foliar fertilizers, among others. Therefore, this study aimed at evaluating the following foliar fertilizers for the management of phoma leaf spot: a foliar fertilizer based on macro‐ and micronutrients (Fmm: 10% N, 4% S, B, 5% Fe and 5% Zn); one based on cobalt and molybdenum (Fcm: 2% Co and 3% Mo); manganese phosphite ( FM n: 30% P 2 O 5 and 9% Mn); and the FM n+Fmm, Fcm+Fmm and FM n+Fcm+Fmm associations compared to a boscalid fungicide and a control with no treatment. The disease severity, the chlorophyll a and b contents, the net photosynthetic rate ( LPR ), the phenylalanine ammonia lyase ( PAL ) activity and the lignin content in leaves were assessment. Based on the severity, the area under the disease severity progress curve ( AUSPC ) and the efficiency of disease control in relation to untreated plants were calculated. The experimental design was in randomized blocks with eight treatments and three replications. Treatments FM n+Fmm and Fcm were the most effective in reducing the AUPSC in comparison with the control and promoted an increased activity of PAL . FM n was the treatment that promoted the highest increase in the LPR . There were no effects of the treatments on the lignin content compared to the control.