Directions say to apply then water immediately; ok to apply during light rain? If rain is imminent? NEED to get rid of grubs..yard is being taken over by moles/voles. Thanks.
I would wait until there is no rain in the forecast for at least 24 hours. This article will help: https://www.gardeningknowhow.com/plant-problems/pests/pesticides/when-to-apply-pesticides.htm