Hi ILGM Grow Experts,
I’m making this post for my son. He noticed some discoloration on some of his leaves and wants reassurance it isn’t a pest or disease issue. For the record the plant has been sprayed with spinosad and there’s diatomaceous earth on the soil surface. He claims nothing was spilled on the leaves but it looks similar to what another grower had on here. I don’t know if there’s really an issue but any feedback is appreciated. Some details:
Strain: HSC Puff Pastry
Current Age: 6 weeks from sprouting (Veg)
Medium: Organic Soil, recycled Recipe 420, earthworm castings, and home compost. Water only currently.
Thanks in advance!
Looks like something splashed up on it nothing to worry about @Cannanaut
May be fungal 
@Budbrother you take a peek 
Thanks @Reed71 ! That was my initial thoughts but he’s convinced it’s more.
Ai says it might be caterpillar frass 
Thanks @kaptain3d ! There was a small caterpillar found so very real possibility.
I’m with @Reed71 on that
Thanks @Budbrother ! The plant is growing vigorously so I didn’t think anything other than something spilled. Happy Growing!