Poder tóxico da flor de pinhão sobre operárias de abelhas africanizadas.

Abstract

In the northeastern semiarid region, plants have secondary components of nectar or pollen that may be toxic or repellent to their pollinators. In this sense, this research aimed to evaluate the toxicological power of flowers of Pinhão Branco (Jatropha pohliana Muell. Arg.), as offered as food to working bees in a controlled environment in the facilities of the Paraiba backwoods Agri-Food Science and Technology Center. Therefore, bioassays were performed at the Entomology Laboratory of the Federal University of Campina Grande, Campus de Pombal. It used dried and crushed white pine nut flowers. The flower dust was weighed in three different fractions (0,25%, 0,50% and 1%) and added to candi and water. The newly emerged operatives were distributed in a set of 20 insects per wooden box measuring 11 cm long by 11 wide and 7 cm high, in three repetitions and the control, making 12 boxes and 240 worker bees, were placed in BO D with temperature adjusted to 32º C and humidity of 70%. The control group received only candi and water. From the results obtained with the research it can be observed that the control bees remained alive until 19, for those treated with 25%, 50% and 100% respectively showed mortality at 14, 11 and 10 days for bees fed with indigo. Data analysis showed statistically significant differences between treatments and control, suggesting toxic effect of macerate obtained from white pine nut flowers for Africanized bee workers Apis mellifera. Thus, it can be concluded from this work that: The bees submitted to controlled diet with concentrations 0,25%, 0,50% and 1% of the flowers macerated. The bees fed only with Cândy (Control) remained alive until 19 with treatments with white pine nut (Jatropha pohliana Muell. Arg.); respectively, showed mortality at 14, 11 and 10 days. The bees fed only with Cândy (Control) remained alive until 19 through the treatments with white pine nut (Jatropha pohliana Muell. Arg.); White Pinion Flowers (Jatropha pohliana Muell. Arg.), showed toxic power to Africanized bee operatives under controlled environment conditions.