SOUSA, M. A.; http://lattes.cnpq.br/5742887755199944; SOUSA, Maria Aparecida de.
Résumé:
Bees are the main pollinators of plants, mainly .4p/s me///cera, they visit many
kinds of flowers. Besides the ecological role, bees are producing honey and
other products of economic interest. However the bees are at risk of being
intoxicated while foraging certain plants, like He//ofnop/um /nd/cunn Linn, which
due to its strong odor, is denomidada sicklepod, belongs to the family
Boraginaceae, consisting of ornamental planta and weeds, widely distributed in
regions tropical. Widely used in folk medicine in many countries, with high leveis
of alkaloids which can be toxic, and this plant has flowers almost all year round.
Based on the above, the aim of this study was to analyze the toxic effect of
flowers of He//ofrop/um /r7d/cum on .4p/s me///cera africanized bees 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 27' C and 80% humidity. The flowers of
F/e//ofrop/t/m /nd/cum were collected near the Federal University of Campina
Grande, campus de Pombal, dried at 65 ' C for three days, crushed and sieved
through nylon sieve, forming a fine powder that was weighed at three
concentrations (0.25%, 0.50% and 1.0%) compared to the weight of candy,
which is an artificial diet.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 1 1 cm long x 1 1 wide and 7 enches 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 (0.25%, 0.50% and 1.0%) and no treatment (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. According
to the data, we found significant differences between the survival curves of bees
under treatments with extracts of H. /r7d/cum and witness the bees who
consumed only the candy, remained alive 17 days and the bees that fed
concentrations of 0.25%. 0.50% and 1.00% of the extracto of F/. /nd/cum
showed 15, 13 and ll days of survival, respectively. Extracts of flowers of F/.
/r7d/cano showed toxicity .4p/s me///cera toxic in the concentrations of 0.25%.
0.50% and 1%, the concentration was 1% which caused bee mortality in less
time, on average 11 days.
