dill going blue, yellow then brown !

[marialittlebzz]

hi everybody !
I have three dill plant which are about 10 inches, they were ok but one of them stopped growing and has turned first blueish then yellow and finally brown... it still give new leaves but very slowly and also I've noticed some very tiny white "caps" like a pest or something.
The others starts to do the same thing now !
Any idea?

[Snadger]

Not sure, but Dill being umbeliferous similar to carrots, I think carrot fly will attack it?Sounds like carrot fly symptoms anyway!