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Fungus gnats wont affect the plants much at all. to control fungus gnats and other dipterans you should remove ALL standing water and let your media/soil etc etc dry down. Fungus gnats are almost always a sign that you are over watering. you can release a predatory mite such as hypoaspis...

aphids dont 'hatch' during the season. They reproduce A sexualy. they are also parthenogenetic. 100% of those aphids are female and guess what, there all born pregnant. you only get males and thus eggs when they are forced to move because of lack of food, overpopulation, and cold weather etc.

Those are good mites. They predate on several pests, if anything you should be moving as many as you con onto your plants. there a good thing.

plz do not post false information. 1. Pythium is not a virus, it IS an Oomycete that causes root rot (fungus not virus) 2. The literature on fungus gnats spreading root rots is a bit inconclusive. there are several published papers showing spread and several showing no spread. 3. there are...

Thats a species of beneficial predatory mite. Most likely Phytoseiulus persimilis.

Mixing DE with your water wont do a dam thing. just spread it over the top of your soil.

He was referring to a kind of pesticide that's really strong (gnarly) since your still in veg and one that's systemic. Systemic pesticides persist in the soil/plant for a longer period of time because they are taken up by & in the plant. http://en.wikipedia.org/wiki/Pesticide

Thrips dont lay eggs in the soil. They have a weird sudo pupal stage in the soil. Sand wont help all that much on its own, if at all. http://www.ipm.ucdavis.edu/PMG/PESTNOTES/pn7429.html http://urbangardenmagazine.com/2010/11/predators-amblyseius-cucumeris-vs-thrips/

It depends on your reason for 2-3 days of darkness. plants will notice light, even if its a camera flash and then complete darkness. if its over the ~5lumens or what ever the number is your plants can tell. The way plants determine day/night is an 'instant' process...

Always inspect new plants (you should be doing this anyways to all your plants) FYI hydro vs soil wont affect aphid infestations or the likelihood of you getting aphids. You can spray or use bio control there are several parasitiods for aphid control such as...

Depending on what stage your grow is at you could try re-potting the plants. remove all the bad soil and get rid of it. Then apply a pyrethrin, neem, etc etc to the roots. THen BLAST the roots with water as well as soaking them (which you probably already had to do to remove ALL the soil) its a...

IDK how effective thats going to be.. Part of the lifecycle of a thrips is in the soil but a sand covering isnt usually used. Post up a picture if you can of the thrips. You can use one of these though. http://www.evergreengrowers.com/amblyseius-cucumeris-202.html...

If you have some give it a shot. Neem doesn't work all that well once its a full on infestation & neem can work well as a deterrent. Dig around as much as you can in the pots & try and find out just how many their are. Ive seen pots that have an infestation on only one side or a corner etc.

I think we need a better picture. My guess is that its not an aphid but idk :( sorry I dont see any cornicles and the antenna look like they are pointed in the wrong direction but im not expert when it comes to root aphids.

Yes I can. Their the wrong color, they hold their wings in a different way, They have only two distinct wings, I could go on and on.. The picture of the white fly may seem similar to you but its not. Even with a shitty picture. there are clear and distinct morphological differences. One is a...

Nope moth flies and white fly are different pests. He doesnt have white fly. Just put some bleach down the sink once or twice and then after that just make sure to run it for a minute or two every day for 1-2 weeks.

Mods wana get this shit out of here? lol.

lol bozo so mean. anywho the cotyledons will drop/turn yellow blah blah blah its normal.

Looks like a deficiency & some of those could be from a heteropteran. IE podi bug etc etc. doesnt look like mite damage at all to me.

How long ago did you change/add nutes to your res?