TITLE:
Physiological potential of soybean seeds treated with thiamethoxam and submitted to storage
AUTHORS:
Lilian Gomes de Moraes Dan, Alessandro Lucca Braccini, Alberto Leão de Lemos Barroso, Hugo de Almeida Dan, Gleberson Guillen Piccinin, Juliana Marques Voroniak
KEYWORDS:
Glycine max; Bio-Activator; Vigor; Physiological Quality
JOURNAL NAME:
Agricultural Sciences,
Vol.4 No.11A,
November
28,
2013
ABSTRACT: Bio-activators such
as thiamethoxam have been used to increase the productive potential of plants, by
means of metabolic and plant morphology modifications. Nevertheless, very
little is known regarding the effectiveness of this insecticide when
incorporated into lower quality level soybean seeds, particularly during
storage. The objective of this work was to assess the influence of thiamethoxam
on the physiological potential of soybean seeds with different initial vigor
levels during four storage periods. Three vigor levels of cultivar Anta—low (35%), medium (70%) and high (85%) vigor—of soybean
seeds were utilized in this experiment. The experimental design was
completely randomized in a 3 × 2 × 4
factorial scheme—3 levels of vigor (low, medium and high); 2 seed treatments
(with and without thiamethoxam) and 4 storage periods (0, 30, 60 and 90 days).
The analyzed variables were: germination, first germination count, accelerated
aging test, seedling length and emergence speed index. Thiamethoxam-treated
soybean seeds benefit the physiological potential of both medium and high vigor
seeds during storage up to 30 days. Whereas, the use of thiamethoxam was shown to
be ineffective in improving the physiological quality of initial low vigor
seeds.