Yellowing older growth leaves falling without burns.?

This plant has had leaves slowly turning yellow then falling off before withering, it started at oldest node very slowly working upward during early flowering. It did have some pest problems last week but is all clear of pests and the organic pesticide used seemed to have no negative effect. No signs of burning on the fallen leaves, the holes/darker spotting seemed to be caused by the pests which are gone now... Other than yellowing there were no blemishes on any foliage prior to beetle infestation. Its in a gallon pot grown outdoors with a miracle soil/perlite mix with super bloom and molasses feedings at 1/4 strength startting 2 wks after preflowers popped up... ( green light superbloom, blackstrap non sulphured) been letting almost dry between watering every week with feeding every other watering.
 
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