Plutella xylostella (Linnaeus, 1758) (Lepidoptera: Plutellidae) is an insect pest that causes great damage to Brassica cultures. It is necessary to develop alternative control methods, because this pest is resistant to many synthetic insecticides that are harmful to the environment. The objective of this study was to evaluate the effects of aqueous extracts of Campomanesia adamantium, C. guazumifolia, and C. xanthocarpa on the life cycle of P. xylostella. These aqueous extracts were prepared in a concentration of 10 g/mL and then applied on cabbage disks of 4 cm2 to feed the larvae until they reached pupal stage. The disks were evaluated daily during the larval stage and replaced every 24 hours. The experiment consisted of ten replicates, each replicate containing five subsamples. The parameters evaluated were larval and pupal survival, pupal biomass, gender ratio, male and female longevity, number of eggs, fecundity, oviposition period and egg survival. The C. xanthocarpa extract increased larval stage and decreased pupal biomass and oviposition period. The C. adamantium extract decreased larval duration, pupal biomass, male longevity, and oviposition period. The C. guazumifolia extract decreased larval stage, male longevity, and oviposition period. The chemical composition of the extracts of Campomanesia species presented flavonoids such as quercetin, phenolic compounds, and tannins, and the highest retention time occurred in C. adamantium. Thus, the extracts of Campomanesia species were effective in decreasing and controlling the oviposition period of P. xylostella, probably because of the presence of flavonoids, which indicates a possible antioxidant potential and, therefore, the observed antibiosis.

Water and fertilizer regulations in Florida have created a market for low‐maintenance grasses. The objectives of this study were to compare rooting and turf performance of three selected turf‐type bahiagrass lines (‘M36’, ‘WEMS12’, and ‘FLDW51’), in comparison with ‘Wilmington’ and ‘Argentine’ bahiagrass, and ‘Floratam’ St. Augustinegrass, grown under three nitrogen (N) rates (49, 98, and 196 kg N ha−1). The experiment was conducted during the summer and fall 2014 in a greenhouse located at the Genetics and Physiology Agronomy Unit, University of Florida, Gainesville, FL, and arranged as a randomized complete block design with four replications. Positive correlations were found between biomass and rooting traits, and both were negatively correlated with shoot and root crude protein. Coarse leaf texture was positively correlated with higher biomass yield but was negatively correlated with crude protein, number of nodes, and chlorophyll content. Cluster analysis based on principal component analysis 1 (51% explained variance) indicated two genotype groupings. Wilmington, WEMS12, and FLDW51 were grouped closely to crude protein, number of nodes, and chlorophyll content, whereas Floratam, Argentine, and M36 were grouped near leaf texture, biomass, and rooting traits. Principal component analysis 2 (18% explained variance) indicated that M36 and Wilmington were grouped closely to leaf length, rhizome size, root to shoot biomass, and crude protein ratios. The three experimental lines and Wilmington exhibited darker green color, had better color retention, and had more nodes per rhizome, and WEMS12 and FLDW51 had narrower leaves. Higher N rates induced higher chlorophyll content and crude protein. Floratam, Argentine, and M36 produced higher biomass yields and exhibited more vigorous root parameters. The improved turf attributes exhibited by these selected lines should be further evaluated for persistence under limited input field regimes.

DETAILED GUIDE TO OWN ASSEMBLY OF 3D PRINTERS. In recent years, there has been an increase in the use of 3D printing for the manufacture of three-dimensional objects. Thus, it is clear that 3D printers have presented as a tool with high potential for applications in several fields, including chemistry. However, despite its popularity, it is notable that some 3D printers have a relatively high cost, in addition to not favoring optimizations or repairs, making users dependent on the manufacturers of such tools. Therefore, this article aims to present, particularly to the chemistry community, a detailed guide for assembling a low-cost FDM-type 3D printer with good performance. Consequently, we hope that this guide can contribute to increasing the 3D printing popularization in the field of chemistry because of the various possibilities of applications in this area.