Place yellow sticky cards in the grow area - fungus gnats love the color yellow and will fly towards it. These yellow sticky cards (found at most gardening stores) are covered with a glue that will trap adult fungus gnats, bringing down their numbers. But the most important reason to use yellow sticky cards is to help you keep track of how bad the current fungus gnat infestation is. As the infestation is reduced, there will be less adults caught in the yellow sticky traps. That's how you know that your approach is working.
INFO FROM GOOGLE [h=2]White Flies / Whitefly[/h]White flies behave just like spider mites. The insect hides underneath the leaf, sucks dinner from the essential nutrients in the plant. This results in white spots on the top side of the leaf. White flies are easily spotted with the naked eye. If you shake the plant a little, they'll fly around. They look like little white moths, around 2 millimeters in size. Solution: ·A white fly problem can be solved basically the same way as aphids. My favorite way to get rid of them is misting your plants in a solution made of 1 part SM90, 5 parts water. When you spray the plants, and make sure you get the undersides of the leaves(that's where they lay eggs). You'll want to do this when the lights are about to go off(or else the leaves will get burned).
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