once you see sacs bursting pollen will be present, often the first set or 2 of sacs will be empty or unfertile but they will soon be followed by many others and they will throw pollen. I have tried selective pollination but i prefer and reccomend that you just keep a male arounnd for breeding autos, just let one live and keep it with the female you want to breed till she swells up w/ seeds. You breeding DR?