Ação de inseticidas sobre o percevejo-castanho-da-raiz Scaptocoris castanea Perty (Hemiptera: Cydnidae) e seu efeito no desenvolvimento e na produtividade da cultura do milho
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Data
2013
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Resumo
Due the lack of registered products for Scaptocoris castanea, new insecticides need to be
developed in order to facilitate growing crops in these heavy soil pests’ areas. The aim of these studies
were to evaluate the performance of insecticides applied at the sowing time (in furrow spray) and in
seed treatment for soil brown stink bug control (S. castanea) and their effect over the plant development
and productivity in corn crop in two locations in Goiás State. The treatments were: Untreated check,
Durivo (chlorantraniliprole + thiamethoxam) at 100, 200 and 300 mL of formulated product/ha applied
in furrow, Cruiser 350 FS (thiamethoxam) in seed treatment at 120 mL/ha + Durivo (chlorantraniliprole
+ thiamethoxam) 200 mL/ha in furrow spray and Cropstar (Imidacloprid + thiodicarb) in seed treatment
at 300 mL/ha + Astro (clorpyryfos) in furrow spray at 1500 mL/ha (standard). The trials were carried
out in Edéia and Rio Verde, in Goiás State (farms with heavy pressure of S. castanea). Trial design
was randomized block with six treatments and four replicates. The plot size was five rows with 45 cm
as row spacing by seven meters length. The results demonstrated that Durivo (chlorantraniliprole +
thiamethoxam) at 300 mL/ha in furrow spray and the combination of Cruiser 350 FS (thiamethoxam)
at 120 mL/ha + Durivo (chlorantraniliprole + thiamethoxam) at 200 mL/ha have been effective for
the S. castanea control in both trials (Edéia and Rio Verde) showing average control around 71%
at 14 days after emergence, and increments of 110% in stand, 56% in plant height, 70% in root dry
matter contents, 52% in aereal part dry matter contents and around 71% of yield increase. The data
has shown significant correlation (R2>0.8) for all parameter assessed in Edéia, where there was higher
pest pressure. Durivo (Chlorantraniliprole + thiamethoxam) presents itself as an important tool, within
S. castanea IPM concept due the effectiveness, low dose per hectare and at this application method
furrow spray shows low environment impact.
Descrição
Palavras-chave
Durivo, Soil pests, Soil stink bugs, Corn, Inseticida, Desenvolvimento da planta, Pragas de solo, Redução populacional
Citação
SILVA, André L. da; SILVA, Alexandre José da; SOARES, William Rosa de Oliveira; FERNANDES, Paulo Marçal; GARCIA, Renato Martins. Ação de inseticidas sobre o percevejo-castanho-da-raiz Scaptocoris castanea Perty (Hemiptera: Cydnidae) e seu efeito no desenvolvimento e na produtividade da cultura do milho. BioAssay, Piracicaba, v. 8, n. 6, p. 1-7, 2013.