Germinação e vigor de sementes de abóbora tratadas com tiametoxam

Elisa Souza Lemes; Andréia da Silva Almeida; Géri Eduardo Meneghello; Lilian Madruga de Tunes; Francisco Amaral Villela

Authors

Elisa Souza Lemes Universidade Federal de Pelotas (UFPel), Faculdade de Agronomia Eliseu Maciel, Pelotas, RS, Brasil.
Andréia da Silva Almeida Universidade Federal de Pelotas (UFPel), Faculdade de Agronomia Eliseu Maciel, Pelotas, RS, Brasil.
Géri Eduardo Meneghello Universidade Federal de Pelotas (UFPel), Faculdade de Agronomia Eliseu Maciel, Pelotas, RS, Brasil.
Lilian Madruga de Tunes Universidade Federal de Pelotas (UFPel), Faculdade de Agronomia Eliseu Maciel, Pelotas, RS, Brasil.
Francisco Amaral Villela Universidade Federal de Pelotas (UFPel), Faculdade de Agronomia Eliseu Maciel, Pelotas, RS, Brasil.

Keywords:

Cucurbita moschata, insecticide, bioactivator, seed physiological quality.

Abstract

The use of high quality seeds is fundamental for obtaining a faster emergence and uniform stand. This study aimed to evaluate the germination and vigor of pumpkin seeds treated with thiamethoxam. The experimental design was completely randomized, in a 3 x 5 (lots of pumpkin seeds and thiamethoxam doses - 0 mL kg^-1, 2 mL kg^-1, 4 mL kg^-1, 6 mL kg^-1 and 8 mL kg^-1 of seeds) factorial scheme, with four replicates. The quality of treated seeds was evaluated by the tests of first germination counting, germination, cold, accelerated aging and emergence, in a greenhouse. Thiamethoxam positively influences the physiologic quality of pumpkin seeds and the lot of seeds with lower quality treated with thiamethoxam shows a higher increase in vigor. The treatment with doses of 4-6 mL of thiamethoxam per kg of seeds is more efficient for improving the physiological quality of seeds.