First Time Grow, 3 Auto Strains

I've noticed one plant Widow #1 has a lot of holes in it's leaves, possibly earwigs because they're in the yard, although none have been around the plants as far as I can tell. Might possibly be burn from salts in the water being on the leaves. Nevertheless this is also the fastest growing plant out of the 6 so far. Used a lot of organic pesticides on the plants and in the surrounding area over the past week. Cotyledons on Moby #1 are basically completely dried up, unsure of the direct cause. But it's the second fastest growing plant of the bunch. Noticed a bit of yellowing on the newest growth, particularly Widow #2. Unsure why. I don't believe overwatering is an issue, since I'm watering every other day and not very heavily, allowing the top layer to dry between waterings. Any comments about a nutrient excess or deficiency would be appreciated. Overall I think these girls are doing pretty well. I welcome any comments and look forward to updating next week.