Efeito de duas plantas do gênero verbenaceae sobre abelhas operárias africanizadas, no semiárido paraíbano.

Abstract

In some plants, minor components of nectar or pollen can be toxic or repellent to their pollinators. In this sense, the objective of this work was to study different concentrations of macerated flowers from Câmara and Chumbinho, as feed for workmen of Africanized bees in a controlled environment. For that, bioassays were performed at the Entomology Laboratory of the Federal University of Campina Grande, Pombal Campus. He used dried and crushed flowers from Câmara and Chumbinho. The powder of the flowers was weighed into three different fractions (0.25%, 0.50% and 1.0%) and added to the candi and water. The newly emerged workers were distributed in a set of 20 insects per wooden box measuring 11 cm in length by 11 in width and 7 cm in height in three replicates and the control, comprising 12 boxes and 240 worker bees, were conditioned in BO D with temperature set at 32 ° C and humidity of 70%. The control group received only the candi and water. Considering the results obtained with the research, it can be observed that the control bees remained alive until the 22 days reaching a statistic average of 17 days and for those treated with 0.25%, 0.50% and 1.0% respectively presented mortality at 17, 14 and 11 days for chambered bees. For bees fed with Chumbinho, it was observed that the control bees remained alive until 21 days, reaching a statistical average of 21 days and for those treated with 0.25%, 0.50% and 1.0%, respectively, presented mortality to the bees. 15, 16 and 17 days. The data analysis showed statistically significant differences between the treatments and the control, suggesting toxic effect of the macerate obtained from flowers of Câmara and chumbinho for workers of Africanized bees Apis mellifera. Thus, it can be concluded with the accomplishment of this work that: The control bees remained alive until the 21 by means of the treatments with camera and pellet; The bees treated with concentrations of 0.25%, 0.50% and 1.0% of the macerated flowers of the chamber, respectively presented mortality at 15, 13 and 11 days; The bees treated with concentrations of 0.25%, 0.50% and 1.0% of the macerated flowers of 14 Chumbinho, respectively presented mortality at 15, 16 and 17 days; Chamber flowers and chumbinho presented toxicity to Melissa Apis under controlled environment conditions.