Revista Colombiana de Entomología

Effect of six diets during the larval and adult period of Aedes aegypti (Diptera: Culicidae) under laboratory conditions

Wed, 19 Mar 2025 00:00:00 -0500

Rearing the laboratory vector Aedes aegypti (Diptera: Culicidae), a disease vector, necessitated diets nutritionally rich in protein and carbohydrates, yet low in fat. The objective of this study was to evaluate and compare the effects of various diets on larval and adult stages, with a specific focus on wing size. Six diets were compared: CIETROP-CC concentrate, fish-based diets (Nutrafin-NF and Aqua One-AO), carnivore-based diets (Ricocan-RC and Supercat-SC), and brewer's yeast (LV). The development of larval stages was assessed using Kaplan-Meier survival analysis, while wing length was compared using Mood's median test. The developmental duration from larva to adult was consistent across all six diets, averaging 13 days. Larvae fed LV exhibited a lower survival rate (88 %) compared to the other diets (99%). Female wing size ranged from 2.81 to 2.93 mm, with a mean of 2.88 mm and a standard deviation of 0.12, while male wing size ranged from 2.18 to 2.28 mm, with a mean of 2.23 mm and a standard deviation of 0.17. All diets supported satisfactory larval development, with no significant differences observed in larval survival or developmental duration (P > 0.05). Notably, the CIETROP-CC and commercial diets yielded similar results. These findings indicate that the laboratory-prepared diet exhibited comparable performance to the other five diets in terms of survival and developmental rates. Further analysis will enable the determination of its specific nutritional composition. The results underscore the efficacy of commercial diets in supporting larval.

Diversity and abundance of mites (Acari: Mesostigmata, Sarcoptiformes and Trombidiformes) on blueberry Vaccinium corymbosum (Ericaceae) in Michoacan, Mexico

Mon, 27 Jan 2025 00:00:00 -0500

In recent years, several species of mites have been reported as an important phytosanitary problem for blueberries. Mexico has become one of the main producers of this crop worldwide, but few studies have focused on the diversity of species present in blueberries in Mexico. Thus, the objective of this research was to report the diversity and abundance of mites associated with V. corymbosum cultivation in Michoacán (Mexico). Plant material was collected in 42 orchards of 18 municipalities of Michoacán. Samples were placed in plastic bags and stored under refrigeration at 4 °C. Mites were processed for mounting in semi-permanent preparations with Hoyer's solution and identified using taxonomic keys. A total of 17 species of mite belonging to 12 genera, five families and three orders were collected. The families with the greatest abundance were Tetranychidae and Tenuipalpidae. Whereas Phytoseiidae was the most diverse with 11 species. The municipality of Peribán and the Biloxi variety were those that presented the greatest diversity and abundance. Of the identified species Oligonychus ilicis, Neoseiulus rufus, Typhlodromips jimenezi and Metaseiulus bidentatus are new records for Mexico. The phytophagous species O. ilicis and Brevipalpus yothersi must be further studied since they can become important pests for the crop. This research will be a starting point for further study of mites in blueberries in Mexico.

In Memoriam AMADOR VILLACORTA MOSQUEIRA (1935-2014)

Juan F. Barrera, Carlos Daniel Vecco-Giove, Tumoru Sera — Wed, 12 Mar 2025 00:00:00 -0500