In this style of painting it uses vibrant colored objects like fresh fruits nice and shiny to show life. then you have decaying plants and other objects to show the process of death. For example insects normally are associated with the process of decay so by him adding them to the painting the help get the message across. Its not too heavy handed because for the most part the image is bright and vibrant and there is still nice fruits in it the bugs and decay is pretty subtle. – Randall