Qualidade de sementes de algodão submetidas aos processos de encapsulamento com e sem corante. = Quality of cotton seeds submitted to encapsulation process with and without dye.

Abstract

Objetivou-se estudar a qualidade fisiológica de sementes de algodão quando submetidas aos processos de encapsulamento com e sem corante em comparação com as sementes apenas tratadas com fungicidas (carboxin e thiran 200 Sc) e inseticida (pirimiphos methyl) - testemunha. A betoneira grande (capacidade de 40 L) recebeu sementes deslintadas +tratadas para serem submetidas ao processo de encapsulação (coating e finishing) com e sem corante, além de uma testemunha não encapsulada, estabelecendo-se os seguintes tratamentos: 1- sementes deslintadas e tratadas com fungicidas (carboxin e thiran 200 Sc) e inseticidas (pirimiphos methyl) (testemunha); 2- sementes deslintadas, tratadas e encapsuladas (coating e finishing) sem corante; e 3- sementes deslintadas, tratadas e encapsuladas com corante. Foi adotado o delineamento inteiramente casualizado com três tratamentos e quatro repetições. As variáveis analisadas foram percentagem de germinação, comprimento de plântulas e massa de 100 sementes. Observou-se que o processo de recobrimento de sementes de algodão deslintadas,tratadas com fungicidas e inseticida e encapsuladas não ocasiona redução na qualidade fisiológica das sementes, e o uso de corante em sementes encapsuladas não altera a sua qualidade. = This study evaluated the physiological quality of cotton seeds when subjected to encapsulation with and without dye compared with seeds treated only with fungicides (carboxin and thiran 200 Sc) and insecticide (pirimiphos methyl) - control. The larger mixer (capacity 40 L) received delinted seeds + treated to undergo the process of encapsulation (coating and finishing) with and without dye, and non-encapsulated served as control. The following treatments were established: 1 - delinted seeds and treated with fungicides (carboxin and 200 thiran Sc) and insecticides (pirimiphos methyl) (control), 2 - delinted seeds, processed and encapsulated (coating and finishing) without dye, and 3 - delinted seeds, processed and encapsulated with dye. It was adopted a randomized delineation with three replications. The variables were germination percentage, seedling length and mass of 100 seeds. It was observed that the coating process of cotton delinted seeds, treated with fungicides and insecticides and encapsulated does not cause reduction in seed physiological quality, and the use of dye on encapsulated in seeds does not change its quality.

Keywords

• Gossypium hirsutum. Material de cobertura. Sementes deslintadas. Tratamento de sementes. = Gossypium hirsutum. Material of coating. Delinted seeds. Treatment of seeds.