Effects of cowpea mild mottle virus on soybean cultivars in Brazil

Author(s):Show less -

da Silva, Felipe Barreto ^[1] ; Muller, Cristiane ^[2] ; Bello, Vinicius Henrique ^[1] ; Maranho Watanabe, Luis Fernando ^[1] ; De Marchi, Bruno Rossitto ^[1] ; Fusco, Lucas Machado ^[1] ; Ribeiro-Junior, Marcos Roberto ^[1] ; Minozzi, Guilherme Barbosa ^[2] ; Vivan, Lucia Madalena ^[3] ; Tamai, Marco Antonio ^[4] ; Farias, Juliano Ricardo ^[5] ; Nogueira, Angelica Maria ^[1] ; Pereira Sartori, Maria Marcia ^[1] ; Krause-Sakate, Renate ^[1]

Affiliation

^[1] Univ Estadual Paulista Julio de Mesquita Filho UN, Dept Plant Protect, Botucatu, SP - Brazil

^[2] CortevaTM Agrisci, Mogi Mirim, SP - Brazil

^[3] Fundacao Apoio Pesquisa Pesquisa Agr Mato Grosso, Rondonopolis, MG - Brazil

^[4] Univ Estado Bahia UNEB, Dept Human Sci, Campus IX, Barreiras, BA - Brazil

^[5] Inst Phytus, Dept Entomol, Santa Maria, RS - Brazil

• Document type: Journal article
• Source: PeerJ; v. 8, AUG 31 2020.
• Web of Science Citations: 0

Abstract

Soybean stem necrosis is caused by cowpea mild mottle virus (CPMMV), transmitted by the whitefly Bemisia tabaci. CPMMV has already been recorded in all major soybean-producing areas of Brazil. The impacts caused by CPMMV to the current Brazilian soybean production are unknown, thus the main objective of this study was to evaluate the effects of CPMMV infection on the main important soybean cultivars grown in the Southern and Midwestern regions of Brazil. Although asymptomatic in some of the tested cultivars, CPMMV infection significantly reduced the plant height, the number of pods per plant and the 1,000-grain weight. In addition, estimated yield losses ranged from 174 to 638 kg h(-1), depending on the cultivar. Evidence of seed transmission of CPMMV was observed in the BMX POTENCIA RR cultivar. These results suggest that CPMMV could have an important role in the reduction of soybean productivity in Brazil, but symptomless infections might be hiding the actual impact of this pathogen in commercial fields and infected seeds could be the primary inoculum source of the virus in the field. (AU)

• FAPESP's process: 17/21588-7 - Bemisia tabaci in Brazil: competitive displacement between criptic species, susceptibility to insecticides, next generation sequencing analysis, virus influence on insect biology and the presence of the endosymbiont Hamiltonella in virus transmission
• Grantee: Renate Krause Sakate
• Support Opportunities: Regular Research Grants