Are they micro webs under the leaves or ordinary large spider webs? If you have spider mites at week 6 this could be a big problem.
For a start, only an infestation would manifest into webs, hosting the whole development cycle of adults, juveniles and eggs.
THE ONLY THING YOU CAN DO IS USE A LIGHT NEEM OIL MIX - 1.5 ML PER LITRE AND SPRAY THOROUGHLY UNDER THE LEAVES, ESPEC ONES WITH WHITE DOTS AND REPEAT EXACTLY 3 DAYS LATER TO KILL THE HATCHING EGGS.
SOME PEOPLE SAY THAT NEEM OIL CAN IMPAIR THE TASTE BUT I DISAGREE AND I KNOW WHAT I'D RATHER BE SMOKING GIVEN THE CHOICE OF MITES OR A BIO OIL !!
GOOD LUCK AND ACT VERY FAST !!