Stink bug control at different stages of soybean development

Débora de Souza Miranda,Célio Borella Júnior,Marlon Ecco,Flávio Gonçalves de Jesus,Marcio Silva Araújo,André Cirilo de Sousa Almeida

doi:10.1590/1808-1657001132018

Débora de Souza Miranda, Célio Borella Júnior + Show 4 more

Open Access

https://doi.org/10.1590/1808-1657001132018

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Abstract

ABSTRACT This study evaluates the effects of combinations of pyrethroids and neonicotinoids on the control of stink bugs at different stages of soybean crop development. The experiment was set up in a factorial randomized block design (4×6: 4 treatments and 6 stages) with 4 repetitions. The following treatments were tested during the V6/V7, R2, R4, R5.1, R5.5 and R 6 phenological stages: 1 – control (no application), 2 – thiamethoxam + λ-cyhalothrin, 3 – acetamiprid + α-cypermethrin, and 4 – dinotefuran + α-cypermethrin. Infestation, number of damaged seeds, number of pods, number of pods per plant, and yield (kg/ha) were evaluated. Stink bug infestations were smaller when applications commenced during the vegetative stages (V6-V8). Pod numbers and yields were highest in the dinotefuran + α-cypermethrin treatment with applications from V6/V8 to R4. The active ingredients dinotefuran + α-cypermethrin reduced stink bug populations and increased yields and could therefore be considered in integrated pest management (IPM) programs for soybean crops.

Highlights

Soybeans (Glycine max L.) are the most important crop in Brazil
Stink bug infestations were smaller when applications commenced during the vegetative stages (V6V8)
The stink bug infestations, pod numbers, yields and percentages of damaged seeds were statistically different at different phenological stages

Summary

Introduction

Soybeans (Glycine max L.) are the most important crop in Brazil. Yields of this crop are significantly affected by phytosanitary problems. Soybeans are planted as a monoculture, which favors pests and diseases at all stages of development (FREITAS, 2011). Phytophagous stink bugs (Hemiptera: Pentatomidae) are the most significant pest for soybean crops. The three main species of stink bugs, Euschistus heros (F.), Nezara viridula (L.) and Piezodorus guildinii (West.), are widely distributed throughout soybean croplands (SOUZA et al, 2016). E. heros is the most abundant of the three, P. guildinii is responsible for the greatest damage and physiological changes in soybeans (SOSA-GÓMEZ; SILVA, 2010; SOUZA et al, 2016)

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