That's the color of bud rot, but that's not usually a problem in warmer, less humid weather...could be that a
caterpillar has bored into the bud and set up housekeeping in there- the only way to check for that is to break the bud open and have a look- the caterpillars that attack the buds usually won't eat any of the leaves, so there's no evidence that they're there till the bud starts to turn brown or beige.
It could just be regular bud rot (botrytis) but I hope it isn't...
caterpillar has bored into the bud and set up housekeeping in there- the only way to check for that is to break the bud open and have a look- the caterpillars that attack the buds usually won't eat any of the leaves, so there's no evidence that they're there till the bud starts to turn brown or beige.
It could just be regular bud rot (botrytis) but I hope it isn't...