After a wet winter and spring, Mosquito Abatement Districts around southern Idaho are expecting a busy summer.  Pools of standing water that we usually see after a rainstorm are fertile territory for mosquitoes that spread the West Nile virus.  Authorities  say the amount of rain we've received this year is on track with 2006 when Idaho led the nation in the number of West Nile virus cases.  Crews are already pre-treating ponds and other areas in anticipation of the warmer temperatures, when mosquitoes hatch.  Meanwhile they suggest that property owners try to drain small puddles or at least treat larger areas of water.  Even a bucket of water around the house can be a good place for mosquitoes to hatch.