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da Cunha TG, Veloso RVDS, de Araújo MMM, Tavares LG, Ribeiro LFB, Tormen GP, Campos DS, Picanço MC, Lopes EA, Pereira RR, Soares MA, da Silva RS. Distribution of Dalbulus maidis (DeLong) (Hemiptera: Cicadellidae) and incidence of maize rayado fino virus and Candidatus Phytoplasma asteris in corn succession planting systems. PEST MANAGEMENT SCIENCE 2023; 79:2325-2337. [PMID: 36799295 DOI: 10.1002/ps.7408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Revised: 02/07/2023] [Accepted: 02/17/2023] [Indexed: 06/02/2023]
Abstract
BACKGROUND Corn is one of the main crops grown globally to produce food for human consumption and animal feed, including raw materials for bioenergy. Effective pest management is critical for the economic viability of corn production. The leafhopper Dalbulus maidis and the diseases transmitted by it have become relevant to corn production. Our study aimed to determine environmental parameters that affect D. maidis populations and the impacts of pathogen dispersion on corn productivity under different rotation systems and sowing seasons. RESULTS The population density of leafhoppers found in the studied crops was low but capable of establishing the diseases and spreading them widely in the crops. The leafhopper's highest occurrence was in the corn vegetative development stage, and its population peaks were earlier in the corn off-season. The incidence of maize rayado fino virus and maize bushy stunt phytoplasma were higher in corn off-season than in the growing season. The incidence of diseases was higher in the final stages of the cultivation cycle. Yield losses were significantly higher for maize bushy stunt phytoplasma and not significant for maize rayado fino virus. CONCLUSION Our study observed that corn's physiological stage was the main factor influencing D. maidis dynamics. The occurrence of D. maidis at low densities was sufficient to ensure the efficient transmission and dissemination of maize rayado fino virus and maize bushy stunt phytoplasma, which had a higher incidence in the reproductive stage and the corn sowed off-season. © 2023 Society of Chemical Industry.
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Affiliation(s)
- Tiago Garcia da Cunha
- Fazenda Varginha, Instituto Federal de Educação, Ciência e Tecnologia de Minas Gerais, Rodovia Bambuí/Medeiros, Bambuí, Minas Gerais, Brazil
- Departamento de Agronomia, Universidade Federal dos Vales do Jequitinhonha e Mucuri, Diamantina, Brazil
| | | | - Matheus Miller Mesquita de Araújo
- Fazenda Varginha, Instituto Federal de Educação, Ciência e Tecnologia de Minas Gerais, Rodovia Bambuí/Medeiros, Bambuí, Minas Gerais, Brazil
| | - Luciano Gabriel Tavares
- Fazenda Varginha, Instituto Federal de Educação, Ciência e Tecnologia de Minas Gerais, Rodovia Bambuí/Medeiros, Bambuí, Minas Gerais, Brazil
| | - Luiz Fernando Borges Ribeiro
- Fazenda Varginha, Instituto Federal de Educação, Ciência e Tecnologia de Minas Gerais, Rodovia Bambuí/Medeiros, Bambuí, Minas Gerais, Brazil
| | - Gislaine Pacheco Tormen
- Fazenda Varginha, Instituto Federal de Educação, Ciência e Tecnologia de Minas Gerais, Rodovia Bambuí/Medeiros, Bambuí, Minas Gerais, Brazil
- Departamento de Agronomia, Universidade Federal dos Vales do Jequitinhonha e Mucuri, Diamantina, Brazil
| | - Diogo Santos Campos
- Fazenda Varginha, Instituto Federal de Educação, Ciência e Tecnologia de Minas Gerais, Rodovia Bambuí/Medeiros, Bambuí, Minas Gerais, Brazil
| | | | | | | | - Marcus Alvarenga Soares
- Departamento de Agronomia, Universidade Federal dos Vales do Jequitinhonha e Mucuri, Diamantina, Brazil
| | - Ricardo Siqueira da Silva
- Departamento de Agronomia, Universidade Federal dos Vales do Jequitinhonha e Mucuri, Diamantina, Brazil
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He Z, Chen L, Yang Y, Zhao F, Zhou C, Zhang D. Geostatistical Analysis of the Spatial Variation of Chrysolina aeruginosa Larvae at Different Stages in Desert Ecosystems. INSECTS 2023; 14:379. [PMID: 37103194 PMCID: PMC10145244 DOI: 10.3390/insects14040379] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Revised: 04/07/2023] [Accepted: 04/11/2023] [Indexed: 06/19/2023]
Abstract
Chrysolina aeruginosa is a major pest of Artemisia ordosica, and knowledge of the spatial distribution pattern of its larvae in their natural habitat is crucial for the implementation of effective control measures. This study employed geostatistical methods to investigate the damage caused by larvae of different age groups and their spatial distribution pattern. The distribution of C. aeruginosa larvae, which cause damage to A. ordosica, differed significantly according to their age. Younger larvae were predominantly found in the middle and upper parts of the plant, whereas older larvae were mainly distributed in the middle and lower parts, with significant differences in distribution location. A generalized linear model analysis revealed that the height of the plant, and plant morphological characteristics such as height, crown width, and ground diameter were significantly correlated with the number of larvae present. Furthermore, the interaction of age with other variables had an impact on the number of larvae. Kriging interpolation showed that C. aeruginosa larvae were distributed in aggregated patches with strong spatial heterogeneity. The younger larvae were more abundant in the center of the sample site, while the older larvae tended to be distributed toward the edges. These findings provide valuable information for designing effective control programs.
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