Phenology associated with degree days for bean - cowpea cultivar BR-17 Gurguéia: A literature review

Abstract

Cowpea (Vigna unguiculata (L.) Walp.) is a culture that plays an important role in agricultural production of Brazilian states. While the culture is well researched, when referring to stages of development are little studies about. Therefore, the identification of phenological stages of crops is very important to facilitate the adoption of best management strategies to better yields and profitability. The objective of this review describe the phenological stages of cowpea cv. BR 17 -Gurguéia relating the number of degree-days (GDD) for each stage of development, indicating pests and diseases that can affect the crop. The phenology of plants has the remarkable characteristic the fact that the GDD is independent of the time and the planting site. Research has shown a greater adaptation of the cycle of some crops to GDD than the number of calendar days, and can estimate more easily cycle time, as well as establish the planting season due to the most appropriate time to harvest. The cultivar BR-17 Gurguéia has at least nine vegetative and reproductive stages having the lowest cumulative thermal demand stage V1 and reproductive stages require a greater number of degree-days compared to vegetative.

Phenology and Harvest Points of Snap Bean Varieties Related to Degree Days Accumulation

“…Phenology refers to the part of botany that studies the different phases of growth and development of plants, both vegetative and reproductive, marking the times of occurrence and their respective characteristics (Oliveira et al, 2018). Accordingly, the phenological characterization of bean accessions is relevant for supporting the work of producers and breeders, thus providing information both for the choice of genotypes suitable for the growing conditions, as well as for their genetic improvement (Santana et al, 2019). In addition, the knowledge about phenology helps in the assertive management of the crop, facilitating the adoption of good cultivation strategies, providing higher yields and profitability (Lopes Sobrinho et al, 2019).…”