Spatial distribution of alternaria brown spot on mandarin correlated with soil fertility

Authors

DOI:

https://doi.org/10.30612/agrarian.v16i56.16951

Keywords:

Geostatistics, Alternaria alternata, Nutritional imbalance

Abstract

Alternaria brown spot (ABS), caused by the fungus Alternaria alternata, is a limiting disease in tangerine (Citrus reticulata) cultivation. Thus, the aim of this work was to evaluate the spatial distribution of ABS and verify its relationship with soil fertility through geostatistics. The experimental area comprised 4.23 ha, where 43 sample points were georeferenced, spaced in a regular grid of 30 x 30 m. At each georeferenced point, the severity of ABS and soil fertility were evaluated. Using the kriging maps, the area under the disease progress curve (AUDPC) was found to be greater in areas with higher levels of potassium and manganese. Also, it was observed that in areas with lower values of pH, Ca/K ratio and percentage of Ca in the CTC, there were higher values of AUDPC. Therefore, nutrient imbalance in the soil increases the severity of alternaria brown spot on mandarin.

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Author Biographies

Diandra Messias da Silva, Covre Agricola LTDA (CA)

Graduated in Agronomy from University Vale of Rio Verde (UninCor), she carried out research at the company Demarchi located in the southern region of Minas Gerais for 5 years with emphasis on citrus, guava, persimmon, apple, pitaya, avocado. She currently works as manager of agricultural operations at the agricultural company Covre located in the Espírito Santo region with emphasis on papaya, conilon coffee, arabica coffee, rubber tree, black pepper, grains and livestock. She has experience in the area of Agronomy, with an emphasis on fruit growing, mineral plant nutrition, cost analysis and projects.

Aurivan Soares de Freitas, Universidade Federal Rural do Rio de Janeiro

Graduated in Agronomy from the Federal University of Campina Grande (UFCG), Master and PhD in Phytopathology from the Federal University of Lavras (UFLA). He was a professor at the Universidade Vale do Rio Verde (UninCor) between 2015 and 2022, working on the courses: Agronomy and Professional Master's Degree in Sustainability in Water Resources. He is currently an Adjunct Professor at the Federal Rural University of Rio de Janeiro (UFRRJ). He has experience in the area of Agronomy, with an emphasis on Phytopathology, mineral nutrition and plant diseases.

Alisson Souza de Oliveira, Federal University of Uberlandia

Graduated in Agronomy (2006), Master (2011) and Doctor (2014) in Water Resources from the Federal University of Lavras. Postdoctoral fellow at the same institution (2014 - 2016) working with Climate Trend Analysis in Precipitation and Air Temperature. He is currently a Visiting Professor at the Federal University of Uberlândia, Campus Araras in Monte Carmelo-MG. He was a professor at the University Vale do Rio Verde-UNINCOR, Campus Três Corações – MG. He has teaching and research experience in the area of Hydrology and Climate Change Impacts.

Laura Thebit de Almeida, Instituto Federal do Norte de Minas Gerais

Agricultural and Environmental Engineering from the Federal University of Minhas Gerais (UFMG), at the Instituto de Ciências Agrárias (ICA) campus in Montes Claros, completed in 2014. Master and PhD in Applied Meteorology from the Federal University of Viçosa (UFV), with a line of research in Hydroclimatology. He has a specialization in Digital Image Processing from the Pontifical Catholic University (PUC-Minas). Acts as an effective professor at the Federal Institute of Northern Minas Gerais (IFNMG), Campus Januária.

Felipe Bernardes Silva, Nexus AgroAmbiente

Agronomist Engineer from the Federal University of Minas Gerais (2013). Master and Doctor in Agricultural Engineering, in the area of concentration in Water and Environmental Resources from the Federal University of Viçosa (2015). He is CEO of Empresa Nexus Agroambiente, a company specialized in offering services and products that will help life in the countryside, providing tools for optimizing agricultural processes, aiming at increasing the profitability of rural producers, as well as environmental services and solutions.

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Published

2023-09-29

How to Cite

Silva, D. M. da, Freitas, A. S. de, Oliveira, A. S. de, Almeida, L. T. de, & Silva, F. B. (2023). Spatial distribution of alternaria brown spot on mandarin correlated with soil fertility. Agrarian Journal, 16(56), e16951. https://doi.org/10.30612/agrarian.v16i56.16951

Issue

Vol. 16 No. 56 (2023)

Section

Paper - Agronomy

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Copyright (c) 2023 Diandra, Aurivan, Alisson, Laura, Felipe

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