kinda hard to tell from the photo - you need a closer shot of the buds... if you are having serious issues with the worms you may be better off cutting sooner than later, although I would try some kind of makeshift netting tent if I could. tokalot has the idea! if you don't have a microscope to check the trichomes, you can sort of tell by looking at the way the bud is behaving. at some point the pistils stop coming out straight up like antennae and start laying over, and changing colors. after a while, you'll get to notice it - the bud looks kind of "tired". the other thing I like to do is to snip a small bud from the middle of the plant and speed dry it in the oven - either overnight with the pilot light or in 20 min on 140 f or so. the smoke will be a bit nasty but you will have some idea of what the bud will look like when dry - they shrink a lot and what looked finished can actually be pretty airball.