How to kill wasp or prevent wasp eating the pears?
Hi, yellow jackets and other wasps, as well as bees, are mad for the sugars provided by overripe fruit this time of year. You can control an individual wasp nest with an insecticide but you can't prevent wasps from flying in to feed on the overripe fruit.
European pears must be picked when they are still quite firm and background color starts to turn from green to light yellow. You'll also see the lenticels (breathing pores) start to darken on fruit skins. Store them indoors in your refrigerator or coolest location in your home. They ripen when brought to room temperature.