| Journal: | Acta scientiarum. Agronomy |
| Database: | PERIÓDICA |
| System number: | 000459548 |
| ISSN: | 1679-9275 |
| Authors: | Nascimento, Joseane Moreira do1 Silva, Darliane Evangelho1 Juchem, Calebe Fernando1 Ferla, Julia Jantsch2 Silva, Rita Tatiane Leão da1 Corrêa, Luiz Liberato Costa1 Johann, Liana1 Ferla, Noeli Juarez1 |
| Institutions: | 1Universidade do Vale do Taquari, Laboratorio de Acarologia, Lajeado, Rio Grande do Sul. Brasil 2Universidade Federal de Vicosa, Departamento de Entomologia, Vicosa, Minas Gerais. Brasil |
| Year: | 2022 |
| Volumen: | 44 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Experimental, analítico |
| English abstract | Phytophagous mites can cause economic losses in many crops, including grapevines. The changes in their population levels may be associated with changes in the predator-prey relationship. Knowledge of the distribution of mites in plants is important for planning sampling strategies and facilitating control decisions. The aims of this study were to (i) evaluate the abundances of Tetranychus urticae (Tetranychidae) and Neoseiulus californicus (Phytoseiidae), and the correlations between them and environmental factors; (ii) determine their distribution on the top, middle, or base strata of the evaluated grapevines (Vitis vinifera, Chardonnay cultivar) and, additionally, report the first occurrence of damage caused by T. urticae in grapevine leaves in the state of Rio Grande do Sul, Southern Brazil. Sixteen samplings were conducted, divided between the 2018 and 2019 seasons. In each sampling, three leaves from the three strata of the plant (top, middle, and base) were collected from 20 plants, totaling 60 leaves per sampling. The predator-prey relationship and their association with environmental variables were evaluated with multivariate correlation, whereas the number of mites per plant leaf strata was compared using a generalized linear mixed model in R software. It was possible to observe the symptoms of damage caused by T. urticae attacks on grapevines in Southern Brazil, characterized by the presence of yellow spots and general yellowing of the vineyard. Our findings indicate that T. urticae and N. californicus individuals are strongly associated with each other regardless of the environmental variables, and such relationship occurs mainly on the lower strata (middle and base leaves) of grapevines. Thus, by taking into account the damage on the leaves of grapevines and the occurrence of T. urticae and N. californicus majorities on specific strata of these vineyards, we suggest that the lower strata of grapevines should be the priority targets for manag |
| Disciplines: | Agrociencias, Biología |
| Keyword: | Quelicerados, Plantas para uso industrial, Fitopatología, Control biológico, Acaros, Vid, Distribución vertical |
| Keyword: | Chelicerata, Plants for industrial use, Phytopathology, Biological control, Acari, Grapevine, Vertical distribution |
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