Application technology of boron via foliar and its effects on cotton crop phenology / Tecnologia de aplicação de boron através de foliar e seus efeitos na fenologia da cultura de algodão

Fabio Henrique Rojo Baio, Raul Rodolfo Francischetti Gabriel, Alex Rogers Aguiar Zanin, Cid Naudi Silva Campos, Cassiano Garcia Roque, Paulo Eduardo Teodoro

Abstract


Boron can be applied to cotton crops together with pesticides. Producers have allied medium and fine droplets to low application rates, which can lead to low boron deposition on the leaves. This work aimed to evaluate the spray deposition and absorption of boron leaf application on a cotton crop, by varying the surfactant and the application rate, comparing the effects on the crops’ phenology and yield. Boron was applied using a backpack sprayer pressurized with CO2. Spray deposition was estimated based on the mass balance methodology. Plant leaves were collected for analysis at 17 days after application. The use and variation of the application technology affect micronutrient B absorption by leaf spray application. The application rate of 120 L ha-1 with siliconized surfactant adjuvant provides higher spray deposition on cotton plants and consequently higher boron absorption. The application rate of 70 L ha-1 without siliconized surfactant adjuvant provides lower boron absorption.


Keywords


agrochemicals application; micronutrient; yield.

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References


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DOI: https://doi.org/10.34117/bjdv6n2-149

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