A high pressure with falling water temps to below spawning temps will back them off, but if the water temps remain in the low 60's or above they don't leave. I've been fishing the last few days with high pressure and abnormally high air temps and the spawn is going on pretty strong. The pollen has been the only problem with sight fishing. I saw a picture of an Elite pro at Smith Mountain Lake using liquid dish detergent to disperse the surface pollen, tried it, and it works. I used about a 50% mix with water to get it to work with a spray bottle. I've been catching them with spinnerbaits, Chatterbaits, Senko's fished like jerkbaits, and wacky rigged Trick and finesse worms.