O poder tóxico do macerado de flor da chanana sobre operárias de abelhas apis mellifera africanizadas.

Abstract

The bees of the species 4p/s me///fera pollinators are generalists as they visit daily diHerent types of flowers, however, are at risk of beíng poisoned by planta containing secondary compounds that may inhibit their activities. The Turnera suba/afa Sm is a plant popularly known as chanana distributed throughout Northeast, widely used in folk medicine, containing various chemical compounds, able to intoxicate their pollinators, has showy flowers that bloom throughout the year. Therefore, the aim of the study was to evaluate a possible toxic effect of flowers Turnera suba/afa the Africanlzed honey bee .4p/s me///Écrã in laboratory conditions. The experiment was conducted at the Laboratory of Entomology at the Academic Unit of Agricultural Sciences Center Agrifood Sciences and Technology, Federal University of Campina Grande. Bioassays were conducted in environmental chamber to 32 ' C and 70% humidity. The flowers of T. sul)u/afa were collected near the Federal University of Campina Grande, campus de Pombal, dried at 40 ' C for 72 h, crushed and sieved through nylon sieve, forming a fine powder that was weighed at three concentrations (0.25g , 0.50g and l.Og) with respect to the weight of the candy. The powder was mixed with candy in their proper concentrations, placed in plastic containers of 10 ml, covered with wire mesh, and served the workers of .4. me///cera newly emerged, distributed set of 20 in wooden box. measuring ll cm lona x ll wide and 7 inches tall and holes in the sides closed with nylon fabric, lined with paper filter with glass lids. The experiment was conducted in completely randomized design consisting of three treatments (0.25g, 0.50g and 1.0g) and one control, distributed in three replications. Data were collected by counting workers killed twenty-four hours after treatment application. The data were passed to the program PRISM 3.0 that made the construction of the statistics and graphs and analyzed using the non-parametric log-rank test, the comparison of survival curves. Flower extractsT. st/l)u/afa showed toxicity to 4. me///fera concentration 1.0% survival at 13 days, low toxicity concentration 0.50g in 17 days survival and no toxicity at a concentration 0.25g survival of 20 days, the survival chancing bees concentration 0%.