Abstract
ABSTRACT The soybean stem fly [Melanagromyza sojae (Diptera: Agromyzidae)] is a pest widely distributed in the Asian continent. In Brazil, its occurrence has been reported since the 1980s, but it had not been reported in Brazilian Savannah areas yet. This is the first record of M. sojae in this region of great importance for the soybean world production. Specimens of the soybean stem fly were collected in a volunteer soybean area, in April 2018, in the Goiás state, Brazil, and sent for molecular identification. The similarity index of the collected specimens with M. sojae was higher than 99 %, thus confirming the identification of the species. The infestation level in the collection area was approximately 100 % of plants with damage caused by this insect. In Brazil, the occurrence of M. sojae, up to the present time, had been described as restricted to the southern states. This record raises the hypothesis that M. sojae is widespread in other agricultural areas of the Brazilian Savannah, and that its dissemination is favored by the maintenance of volunteer soybean.
Highlights
The soybean stem fly [Melanagromyza sojae (Diptera: Agromyzidae)] is a pest widely distributed in the Asian continent
In Brazil, its occurrence has been reported since the 1980s, in the southern states of Rio Grande do Sul, Santa Catarina and Paraná (Gassen & Schneider 1985, Link et al 2009), and it is considered a biosafety hazard for the country (Hirose & Moscardi 2012)
The first occurrence of M. sojae in the Brazilian Savannah was verified by the Laboratory of Integrated Pest Management team of the Escola de Agronomia, Universidade Federal de Goiás (MIP-UFG), at the end of April 2018, in Silvânia
Summary
The soybean stem fly [Melanagromyza sojae (Diptera: Agromyzidae)] is a pest widely distributed in the Asian continent. Espécimes da mosca-da-haste foram coletados em área de soja voluntária, em abril de 2018, no estado de Goiás, e encaminhados para identificação molecular. The presence of M. sojae in Brazil was reported again in secondcrop soybean, in the states of Santa Catarina and Rio Grande do Sul (Guedes et al 2006, Arnemann et al 2016), in 2015.
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