Efficacy of Seed Treatment with the Mixture of Acetamiprid +
Fipronil for Controlling Aphis gossypii Glover (Hemiptera: Aphididae)
Marcelo Francisco A. Pereira, Rodrigo dos S. Borges,
Célio Luiz Justo, Danila de Cássia Paschoal
Abstract
The cotton aphid, Aphis gossypii Glover
(Hemiptera:
Aphididae), is one of the main cotton crop pests and the use of
insecticides is
important in its control. The objective of this study was to evaluate
of the
efficiency of mixture of acetamiprid and fipronil insecticides, in dry
cotton
seed coating, in controlling A. gossypii aphids. The experimental design
was of randomized plots with seven treatments and four replications.
Cotton
seeds, from cv. Delta Opal, were submitted to the following treatments
– at g
of active ingredient (AI) 100 kg-1 of seeds:
acetamiprid+fipronil -
200+50, 240+60 e 280+70, acetamiprid – 210, fipronil - 70,
tiametoxam - 210 and
control (seeds without treatment). After plants emergency, aphids on
leafs of
ten plants per plot were evaluated. The pest population was least on
cotton
crop under seed treatment with acetamiprid+fipronil, acetamiprid and
tiametoxam. The mixture of acetamiprid and fipronil
was effective in controlling A. gossypii
in cotton crop, even at 200+50 g AI. 100 kg-1
of seeds, by causing 93, 82 and 93% of mortality, at 11th,
15th
and 21th days after seedling emergence,
respectively.
Key
words
- cotton aphid,
integrated pest management, insecticide, chemical control.
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