Resistência de clones de batata‑doce a Meloidogyne javanica

Abstract

Resistance of sweet potato clones to Meloidogyne javanicaThe objective of this study was to evaluate and select clones of sweet potato (Ipomoea batatas) for their resistance to Meloidogyne javanica. Sixty-tree clones were evaluated, among the commercial cultivars (Brazlândia Rosada, Brazlândia Branca, Palmas, Princesa and Coquinho) plus the tomato cv. Santa Clara (susceptible to Meloidogyne spp.). The stems were planted in expanded polystyrene trays with 72 cells with commercial substrate and maintained in a greenhouse. The experimental setup was a randomized blocks design with three replications and six plants per plot. The pathogen inoculation was carried out 30 days after the stems planting, and after 75 days the stems were removed from the polystyrene trays and their roots were washed. Extraction and counting of nematode eggs were carried out. Classifying resistance levels was carried out based on reproductive factors (FR) and reproduction index (IR). Of the 63 clones 71.43% were identified as resistant by the reproduction factor and 82.51% were classified as highly resistant or very resistant by reproduction index. When the both classification criteria were used, 71.43% of sweet potato clones were classified as resistant to Meloidogyne javanica.

Productivity and quality of sweet potato roots cultivation with and without chicken manure

“…Sweet potato has a wide adaptation to different environments, soil types and fertility conditions, being characterized by its rusticity, low production cost and cultivated mainly by small producers and without fertilization (ANDRADE JÚNIOR et al, 2016). It is considered one of the most important cultures in the world, used as a source of family subsistence food, with high energy value, rich in vitamins and proteins (CAVALCANTE et al, 2010).…”

“…According to Akoetey, Britain and Morawicki (2017), sweet potatoes are an important source of carbohydrates consumed in different ways, especially, baked or boiled and in the manufacture of products such as starch, flour, canned goods and purees. In addition, mainly tethers can also be used in animal feed (ANDRADE JÚNIOR et al, 2016), especially in dry seasons, where there is a shortage of pastures (VIANA et al, 2011). In industry, in addition to food, it is used as a raw material for the production of fabrics, paper, cosmetics, fuel alcohol, among others (DÉSIRÉ;VIVIEN;CLAUDE, 2017).…”