Soil pests, Tuberous roots, Pests, Processing industry


The aim of this study was to evaluate the quality of starch produced by plants that suffer damage caused by M. fryanus, analyzed by colorimetric and morphological indices. Colorimetric data were composed of luminosity indices, “a” and “b” chroma coordinates and darkening index. For morphological data, the perimeter and area of starch granules extracted from cassava roots were analyzed. The variables were summarized in a principal component analysis and the axes scores retained for interpretation were correlated with the damage caused by the M. fryanus. From these analyses and observing the main effects, linear regression models for the variables were determined, according to the level of damage caused by the pest. The damage caused by M. fryanus in the roots strongly influenced the indices related to starch colorimetry, hence, under conditions of greater damage, the tendency of the chroma coordinates to vary toward red and yellow was observed and a decrease in starch luminosity occurred, inversely proportional to the increase in darkening. Similar to what was observed in the colorimetric data, a drop in the size of starch granules was noted in the roots, which suffered greater damage from the pest.

Author Biographies

Julio César Guerreiro, Maringa State University/ Department of Agrarian Science

Maringa State University,  Department of Agrarian Science, Campus de Umuarama, Umuarama, Paraná, Brazil

Ana Paula Azevedo, Maringa State University/ Department of Agrarian Science

Maringa State University, Department of Agrarian Science, Campus of Umuarama, Umuarama, Paraná, Brazil.

Evandro Pereira Prado, Sao Paulo State University/ Department of Plant Production

Sao Paulo State University, Department of Plant Production, Campus of Dracena, Dracena, São Paulo, Brazil.

Vanda Pietrowski, Western Paraná State University

Western Paraná State University, Campus of Marechal Cândido Rondon, Marechal Cândido Rondon, Brazil.

Rudiney Ringenberg, Embrapa Cassava and Fruits

Embrapa cassava and fruitculture, Cruz das Almas, Bahia, Brazil.

Cristiane Mengue Feniman Moritz, Maringa State University/ Department of Agrarian Science

Maringa State University, Department of Agrarian Science, Campus of Umuarama, Umuarama, Paraná, Brasil.

Thais Carneiro Ghiotto, Federal University of Sao Carlos

São Carlos Federal University, Campus Sorocaba, Sorocaba, São Paulo, Brazil

Thaíse Milena Pascutti, Maringa State University/ Department of Agrarian Science

Maringa State University, Department of Agrarian Science, Campus of Umuarama, Umuarama, Paraná, Brazil

Pedro José Ferreira-Filho, Federal University of Sao Carlos

Federal University of São Carlos, Campus Sorocaba, Sorocaba, São Paulo, Brazil.


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How to Cite

Guerreiro, J. C., Azevedo, A. P., Prado, E. P., Pietrowski, V., Ringenberg, R., Moritz, C. M. F., Ghiotto, T. C., Pascutti, T. M. ., & Ferreira-Filho, P. J. (2022). CASSAVA ROOTS DAMAGED BY MIGDOLUS FRYANUS PRODUCE POOR QUALITY STARCH. REVISTA DE AGRICULTURA NEOTROPICAL, 9(2), e6884.

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