Phytosociology of weeds in coffee cultivation Coffea canephora, in Cujubim-RO

Abstract

Coffee culture has a great influence on the economy of the state of Rondônia, with the conilon variety being the most produced. However, it is known that agricultural crops are affected by weeds, which compete for natural resources necessary for production, and it is therefore important to identify the species to carry out control. The objective of this work was to carry out a phytosociological survey of weeds in the coffee crop Coffea canephora, in the municipality of Cujubim-RO. Sampling was carried out on a rural property, in December 2020, using a square metal measuring 0.5 x 0.5 m, which was randomly thrown 20 times between the lines of the coffee tree. The production area was 1 hectare and the plants were approximately 2 years old, spaced 2.0 x 1.1 m. 23 species of weeds were found distributed in 13 families, with the eudicots class being predominant with 69.57%. The species Mollugo verticillata and Spermacoce latifolia were the most important, presenting an importance value index of 89 and 73.83, and relative importance of 29.67% and 24.61% respectively. Therefore, close attention should be paid to these species, as in the area in question they are the species of greatest economic importance.