Open AccessDrop spectrum in backpack sprayers in scarlet eggplant (Solanum aethiopicum)
Author(s) -
Leonardo Carnevale Coelho,
Túlio de Almeida Machado,
Anderson Gomide Costa,
Elton Fialho dos Reis,
Cristiane Fernandes Lisbôa
Publication year - 2021
Publication title -
colloquium agrariae
Language(s) - English
Resource type - Journals
ISSN - 1809-8215
DOI - 10.5747/ca.2021.v17.n6.a465
Subject(s) - randomized block design , mathematics , nozzle , sprayer , horticulture , statistics , orthogonal array , factorial experiment , agronomy , taguchi methods , biology , engineering , mechanical engineering
The use of manual backpack sprayers is common on rural properties for the application of phytosanitary products with different types of nozzles. The aim of the study was to evaluate the drop spectrum in the spray solution on scarlet eggplant crop. The study was conducted in a randomized block design (RBD) with a 2x3 factorial scheme, consisting of two working pressures 15 and 45 Psi, and three spray nozzles with four blocks. For the acquisition of information, hydrosensitive papers were used, which later had their images digitized and analyzed by the Gotas® software. The following values were extracted: number of drops, dispersion, applied volume, coverage and volumetric mean diameter (VMD). Then, the values found were subjected to analysis of variance and, according to significance, were compared by Tukey test at 5% probability level. For each factor, separately, the coefficients of variation were analyzed and then an analysis of the correlation between these factors was performed. The highest pressure produced the greatest number of drops and application coverage. Coverage was also the best at this pressure, which led to the highest coverage percentage.