Espaçamento para produção de sementes de Malva (Urena lobata L.) em terra firme na região de Manaus-AM

Isolation and Identification of Endophytic Fungi of Urena lobata L. Cultivated in Amazon

“…Symptoms of disease caused by Phomopsis sp. in experimental field of malva seed production in Manaus, and that after a period the symptoms disappeared without application of any control method (Bentes et al, 2017). This suggests that this endophytic fungus, in this culture, can become pathogenic and return to being endophytic due to environmental conditions in the host, and consequently in the fungus (Schulz & Boyle 2005).…”

“…In Amazonas state, Malva is cultivated by traditional family farmers exclusively for fiber production in lowland environments, next to Amazon river channel. Due to the limitations of these cropping sites caused by seasonal flooding, plants are harvested before completing their life cycles and produce seeds (Souza, 2012;Bentes, Pereira, Mendes, Castro, & Cunha, 2017).…”

“…These spontaneous seeds are purchased and distributed to fiber floodplain farmers by the Amazonas State Secretariat of Rural Production (SEPROR/AM) or by the textile industries. Often, offered quantities do not supply the demand, causing a reduction in fiber production due to the lack of this critical input (Souza, 2012;Bentes et al, 2017).…”

Genetic Divergence in Urena lobata Accessions to Quantitative Traits

“…The mallow is a shrub that reaches up to four meters high (Joly, 2002). According to Bentes et al (2017), because it results in higher productivity, the indicated spacing for mallow seed production is 1.5 × 0.5 m, in which the average height of the plants was 2.22 m. The accessions of this present study presented phenotypes of short stature, similar to those observed by Bentes et al (2017). Plant height is one of the characteristics well worked in the improvement of species of agronomic interest, since; the selection of genotypes with smaller size facilitates both the cultural treatments, as well as the harvesting operation.…”

“…Despite the great economic and social importance that the culture represents for the region, no conclusive study were reported in the literature on the genetic diversity of this species; these informations are extremely important for the implementation of programs for the conservation and pre-improvement of this crop, mainly related to the production of seeds in the State of Amazonas. It is known that one of the main bottlenecks in the production of fiber is the seed, since all the production of this input comes from the State of Pará, and does not supply the needs of the mallow farmers in Amazonas (Bentes et al, 2017).…”