Coverage of corn plants using different hydraulic nozzles and application volume rates

• Published in: Journal of plant protection research Vol. 62; no. 2; pp. 198 - 206
• Main Authors: Nascimento, Roxana Stefane Mendes, Parreira, Douglas Ferreira, Milagres, Juliana Souza, Afonso, Danilo Felipe, de Sousa Oliveira, Pedro Luid, Moraes, Rafael Guimarães Silva
• Format: Journal Article
• Language: English
• Published: Warsaw Polish Academy of Sciences 01.01.2022
• Subjects: application technology; Cereal crops; Corn; Coverage; droplet density; Droplets; Fungicides; Nozzles; Pesticides; spray coverage; Spraying; Tips; Vegetables; zea mays
• ISSN: 1427-4345; 1899-007X
• DOI: 10.24425/jppr.2022.141356

An efficient application of phytosanitary products depends, among other factors, on a good selection of nozzles and the application volume rate of the solution used. Thus, the objective of this work was to evaluate the efficiency of different models of hydraulic tips and application volume rates on spray coverage on targets positioned in the upper, middle and lower thirds of corn plants. The application volume rates evaluated were: 50 l · ha −1; 100 l · ha −1; 150 l · ha −1; 200 l · ha −1; 300 l · ha −1 and 400 l · ha −1. The following nozzles were used: TT 11001, TTJ60 11002, TXA 8003, 30HCX 12, GRD120 02 and GAT11002. Applications were carried out in phenological stages V6–V7 of corn plants. There was a directly proportional relationship between an increase in application volume rate and the levels of spray coverage and droplet density in the three thirds of corn plants. The application volume rate evaluated, except for 50 l · ha −1 in the lower third, provided a number of droplets compatible with the literature recommendations for the application of systemic fungicides. All tips evaluated provided a number of droplets compatible with the recommendations in the literature for the application of systemic fungicides, therefore, they can be recommended for use in spraying on corn crops.