author(s)
Kamrul Hassan, Nasrin Akter, Md. Fuad Mondal and Mahfuza Pervin

abstract
Induction by herbivores either positively or negatively effect on pollinators behavior. However, there are likely to be little studied whether foliar spray of Benzoic acids on plant can be correlated with pollinator behavior. Our studies focus on the application of benzoic acid at 0mM, 0.005mM, 0.05mM, 0.5mM and 0.1mM doses respectively on Brassica nigra at flowering stage. Common garden experiment was performed with five treatments while each replicated six times. Overall, honey bee’s attraction was significantly higher at 0.1mM than control plots albeit honey bees visiting flowers were similar to control plants. We assumed there were no changes which would affect the attraction of pollinators or changes could be perceived but there was no reason to change the behavior. However, at 0.05mM, syrphid flies visited more flowers than control plots and variation was statistically significant. Pod and seed weight (gm) was increased at 0.01mM than control. Our result indicates that at high doses pollinator visited more flower than control, therefore is likely to increase seed weight (gm).