Phytosociological Survey in Pineapple Cultivated in Northern Minas Gerais

Abstract

This study aimed to identify some of the main weed species in the pineapple crop grown in northern Minas Gerais state, Brazil. The phytosociological survey was carried out in two seasons, spring-summer and fall-winter, in a pineapple cultivation area of Unimontes, using the square inventory method (0.25 x 0.25 m). The samples were identified and quantified by families, genera and species, evaluating: frequency, relative frequency, density, relative density, abundance, relative abundance, importance value index, relative importance value index and similarity index. In the spring-summer period, ten species were identified, distributed in nine genera and eight families, highlighting the Euphorbiaceae and Poaceae families, with two species each. The species with the highest importance value indexes were Cyperus iria (77.29), Cynodon dactylon (51.99) and Euphorbia heterophylla (45.46). In the fall-winter period, six families, seven genera and nine species were identified, since three of the Euphorbiaceae family, with more species. The species that showed greater importance value indexes in the fall-winter period were Amaranthus hybridus (48.64), Cyperus hiris (48.11) and Euphorbia hirta (45.06). The similarity index was 84.21%, with 11 species in common, demonstrating a high homogeneity between the two evaluated periods.

Dynamics of the weed community during pineapple growth in the Brazilian semi-arid region

“…1). Sarmento et al (2017) cultivated pineapple under similar climatic conditions in the spring-summer period of Brazil and identified ten weed species distributed in nine genera and eight families, with the families Euphorbiaceae and Poaceae standing out, with two individuals each. In the autumn-winter period, nine species, seven genera and six families were identified, with Euphorbiaceae and Poaceae standing out again with three and two individuals, respectively.…”

“…A phytosociological study for weed management is justified as infestation conditions are varied and the management possibilities are diverse (Sarmento et al, 2017;Santos et al, 2019) since the establishment and dynamics of a weed community depend on edaphoclimatic conditions, crop practices, seed bank, etc. (Adegas et al, 2010;Swanton et al, 2015;Korres et al, 2019).…”

Phytosociological Survey of Weeds in Coffee Plants Irrigated Under Different Systems

“…The poaceae family still stands out in crops of several other crops, both annual and perennial, being observed in bean varieties (Silva et al, 2017), cassava (Cardoso et al, 2013;Soares et al, 2015), sugar cane (Soares et al, 2011) papaya (Costa et al, 2019), pineapple (Sarmento et al, 2017), orange (Santos et al, 2015) and mango (Sena et al, 2019). This wide distribution of weeds from the poacea family is directly related to the large amount of seeds produced, which provides an increase in the dissemination power of these species (Maciel et al, 2010).…”

Levantamento fitossociológico das plantas daninhas em diferentes frutíferas de clima temperado no Município de Lavras – MG

“…Assim, um levantamento fitossociológico deve ser frequentemente elaborado para se Research, Society and Development, v. 9, n. 8, e964986553, 2020 (CC BY 4.0) | ISSN 2525-3409 | DOI: http://dx.doi.org/10.33448/rsd-v9i8.6553 6 ter fontes de informação para que as estratégias de controle sejam implementadas com maior segurança e eficiência. Este levantamento fornece base de dados que permite comparar as áreas e plantações distintas (Sarmento et al, 2017). Objetivou-se com esse trabalho efetuar um levantamento fitossociológico das plantas daninhas existentes no cultivo de frutíferas de clima temperado no município de Lavras-MG. Para o levantamento, foi utilizado uma armação metálica com área de 1 m², que foi lançada três vezes em cada área estudada ou cultivo diferente.…”