Insect predators can be effective if you have a small problem or if you need to get to harvest and chemical sprays are not a good option. Diatomaceous Earth – Basically, this is fossil dust – sprinkle on the top of your soil, and anywhere else in your room (window sills, doorways, etc). This powder-like substance is harmless to mammals and plants but is incredibly sharp at the microscopic level. Therefore it will tear and dehydrate spider mites on physical contact. This will not get rid of an infestation but can help control and slow things down when used effectively.
Treat Entire Grow Area With Insecticide, Not Just Plants! – Treat complete room with broad-spectrum insecticide (only do this for a really bad problem or one that keeps coming back) – avoid this if you can! Note: Many growers try to avoid chemical sprays or miticides which contain Abamectin or lindane because these are harmful to humans. Please take a look at anything you use to treat your grow room, follow the directions closely, and heed all warnings. Some treatments will work for some setups or types of mites, but not for others. As mentioned earlier, if you got your spider mites from another marijuana grower, chances are you may need to resort to extreme measures to get rid of your infestation. Step 2: Follow up in 2-3 days with a different method to kill them (you should also re-apply your first method) Follow up in 2-3 days with something different that will also kill their eggs and any surviving adults. The adults at this point will already be more resistant to your original method so you’ll get the best results using something else for the second treatment.
Step 3: Repeat Step 1 & 2 at least one more time – always treat grow area at least once after you think spider mites are completely gone. Repeat steps 1 & 2 at least one more time to ensure that you have really cleaned out your grow room. Some species of spider mite can take days or weeks to mature and will reappear in the grow room stronger than ever. Because of this, you should treat your area at least once after you are almost certain that all the spider mites are gone. Using a mix of several different methods seems to work best for getting rid of spider mites. Some spider mites are more resistant to some methods than others. If you can see spider mites with your eyes, it means you probably have millions in the room waiting to hatch. Step 4: Prevention: thoroughly inspect and proof your grow area against future attacks. Once spider mites are gone, you need to worry about prevention. With spider mites, the best offense is a good defense! Stop spider mites from ever getting hold of your grow room with good prevention…. If you’ve had spider mite attack your grow room in the past, you might be unintentionally doing something to encourage or attract them. There are many preventative products such as sprays which make plants less tasty to annoying spider mites. However, these should only be used as a supplement to good gardening practices. The most important aspect of spider mite (or any marijuana pest) prevention when growing indoors is a clean and secure grow room. Many indoor growers get spider mites from bringing in cannabis clones that are infected, or from visiting another grower or grow room with spider mites. Even just a few eggs on a clone or a few spider mites on your clothes is all it takes to start a full-fledged infestation. This is the most common way people get spider mites, especially the marijuana-specialist spider mites (“the borg”) which can be almost impossible to kill! Most importantly, never move plants or clones from the outside world into your grow room without treating and quarantining them. If you get a new plant, keep that plant away from your other plants until you know that it’s clean. For every new plant or clone: Get a handheld microscope and use it to look for bugs on new plants. Check closely for tiny spots on the leaves which could be spider mite bites.
Also, check for eggs and tiny bugs underneath the leaves. It’s easiest to find bugs when the plant is at its smallest. Dip new clones or small plants in room temperature water treated with Safer Soap or Mighty Wash If you can’t dip the plant, spray with a proven spider mite cure. Keep new plants in quarantine for at least a week and check regularly to ensure they have no bugs before you bring them around your other plants. Never go directly into the grow room from outdoors to avoid tracking in bugs. If you’ve visited another grower or grow room, it’s especially important to change your clothes and possibly shower before going to check on your plants. You don’t want to infect your plants with spider mites that are cannabis specialists! One of the cool things about growing with seeds is you never have to worry that they come with bugs!
Not only does this help prevent bugs but it protects buds so they don’t have fibers and dust all over them! Collect any dead leaves or other plant matter regularly and remove them from your growing space.