[erineisner]

Option 1: Set up a CAN filter inside the grow room and mount an inline fan on top. Keep in mind this will take up some space and will not vent air or heat out of the room. However, any supplemental CO2 supplied within the room will not be lost and the filter will eliminate the majority of any odor.

Option 2: Vent air from just outside of the grow tent into the tent. Set up a CAN filter inside with an inline fan mounted on top. Duct air out of the fan through an AC reflector and out of the tent. In this situation, air is just being circulated from the room right back into the tent repeatedly.

Option 3: Vent air into the grow room from a separate room. Have a CAN filter set up inside the grow room with an inline fan on top and vented through an AC reflector. Duct air from the other end of the reflector out into the grow room and then out into a separate room. You can vent air outside or into a basement to heat your home. *

Option 4: Assemble a CAN filter with an inline fan outside of the grow room. Use ducting to vent the cool filtered air into the grow room and up through an AC reflector. On the other end, duct air out of the room and outside or into another room. This system will move heat out and leave more space inside the room. *

* If you are still concerned about the smell of the air vented out, set up a separate inline fan attached to a carbon filter or another CAN filter outside of the grow room before ducting outside or into a separate room.

[erineisner]

In order to prevent these pests from reoccurring next year, it is important to eradicate them now. The best product to control any leaf eating worm or caterpillar is known as Bt (Bacillus thuringensis). And although it may sound scary, it is a naturally occurring soil bacteria that ONLY effects these sorts of insects. As for the powdery mildew, try a sulfur or copper based fungicide to combat the fungus.
Now, the most important thing you can do to protect the rest of your garden is to get these infested plants OUT! If you want to be thorough, treat the entire garden (infested or not) with both the fungicide and the Bt. Next, remove the plant material that is showing signs of infection or infestation. Keep a very close eye on the remaining plants in your garden throughout the rest of the growing season and treat plants as needed. Once the growing season comes to an end be sure to remove all remaining plant material (even weeds) before winter hits. Additionally, be sure to regularly disinfect garden tools and equipment, and do so especially after coming into contact with diseased plant materials.
There are a couple different ways in which you can dispose of these plants. Since powdery mildew spores generally do not survive long after their host plant dies, it is acceptable to add infected plant material into your compost pile. (Insect pest infested materials are good to go as well). If you do not have a compost pile, you can burn or bury the material (again, powdery mildew is ok to bury because it is not soil borne). Finally, you can always add these materials into your green waste trash bin as well

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