Quote Originally Posted by MarijuanaMike11
Thanks for your info Ga Grown. I picked up some Neem Oil only and did apply it using tepid water. Since this is my firsttime growing hydro I made the mistake of growing 3 different strains. The prob strain is THC Bomb. The Afgan Kush and Jewel are not as far along as the THC Bomb. Since a few of the leaves on the Jewel plant are getting some rust spots I decided to just spray everything even if this means losing the THC Bomb plant.
Thing that I wonder is how did I get these since I started from seed. The Jewel plant is in soil next to the others and I'm thinking my probs may have been intro'd by this plant as I bought it at a dispensary and it may have had stuff in the soil.
Lastly, any thoughts on why this happened so late in the cycle? Should I not have had this prob long b4? Seems prob did not appear until about 4 weeks into flowering.
Anyways, again I thank you for your advice.

MM
Let me say this to start with.. I'm not a hydro guy.. I do the soil thing. It's alot less forgiving in 99% of situations..The only reason I can see is that your humidity is high.. They love HPS light and high humidity..Your canopy got filled in and left an umbrella.In most cases with hydro it's humid under the canopy.They love the undersides of the leaf.The stalk and stems are just the highways they travel. Don't really matter if from seed or clone. You would still had gotten them.Given the right environment.