Danos de Melanagromyza sojae (Diptera: agromyzidae) em soja

Detalhes bibliográficos
Ano de defesa: 2021
Autor(a) principal: Marques, Rafael Paz
Orientador(a): Não Informado pela instituição
Banca de defesa: Não Informado pela instituição
Tipo de documento: Dissertação
Tipo de acesso: Acesso aberto
Idioma: por
Instituição de defesa: Universidade Federal de Santa Maria
Brasil
Agronomia
UFSM
Programa de Pós-Graduação em Agronomia
Centro de Ciências Rurais
Programa de Pós-Graduação: Não Informado pela instituição
Departamento: Não Informado pela instituição
País: Não Informado pela instituição
Palavras-chave em Português:
Link de acesso: http://repositorio.ufsm.br/handle/1/24051
Resumo: The soybean stem fly, Melanagromyza sojae Zehntner (Diptera: Agromyzidae), an important soybean pest in East Asia, has recently invaded and colonized the major soybean producing countries of South America. Management strategies for this pest remain largely undeveloped due to lack of information regarding its damaging potential in Brazil and neighbouring countries. The objective of this study was to quantify soybean yield reduction caused by M. sojae damage. Two experiments were carried out during the 2019/2020 (experiment A) and 2020/2021 (experiment B) cropping seasons. The experimental design was completely randomized with eight treatments and ten replicates for experiment A and seven treatments and ten replicates for experiment B, representing different levels of coexistence between the target pest and soybean plants. Number of grains, 1000-grain weight, grain yield and number of pods were quantified for lower, middle and upper canopy segments of the plants. In experiment A, each 1% of injured stem in the lower, middle and upper canopy segments reduced (p<0.0001), respectively: 1.41, 0.71 and 0.75 grains/plant; 2.45, 3.10 and 3.36 g of 1000-grain weight; and 0.43, 0.24 and 0.23 g of yield/plant. Considering the three segments, yield reduction reached 0.9 g/plant (p<0.0001) for each 1% of injured stem. The findings from this study point to a high damaging potential of M. sojae under Brazilian growing conditions and highlight the need to develop management strategies for this pest in soybean crops.