Howdy dayan, Looks like You have an infestation of some sort of critter! I'm not sure what kind, could be spider mites, but the 'webbing' does not look like the photos that I have seen (I have not (knock-on-wood!) not had any of them on my grows before). I have used Azamax as a foliar spray and directly in the reservoirs (DWC, indoors) before for white flies, Thrips, and fungus gnats before with good results.
What is the growing method (hydro, soil,indoors or outside)?