Natural Ways to Prevent Whitefly Infestations
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White flies usually start with houseplants. They are hard to eliminate. It’s best to isolate any plant to avoid having all the plants infested. Remove by hand any leaves that are heavily infested with whiteflies. The best solution is preventative. Check houseplants carefully before you bring them inside your house, especially the undersides of leaves which can be sponged and cleaned.
I have lots of lady bugs working hard to get rid of the white flies but I was wondering if the homemade spray that you are recommending is okay with lady bugs around.
Thanks
I applied the alcohol, water and liquid soap mix which gave good result. No more white flies and I am applying spray periodically on the stems.
I’m not sure. I’m finding that soap may be OK overall for the adult form but maybe not for the softer-bodied larvae. I can find nothing about the effect of the rubbing alcohol on lady bugs. (Also, as with any alcohol spray, test a little area first to check for plant sensitivity, and do not apply in direct sunlight.) It might be safest to just let the lady bugs continue their task, since you have a good collection of workers!
hi; I have a very large gardenia. Last year, I was advised to use a fungicide which I mixed with water and poured into the ground around the bush rather than attempting to spray the this very large shrub/bush. I am not able to find a similar product this year - all the products are for spraying. Any suggestions?
Well, the first thought we have is to inquire of the source you had a year ago. The National Gardening Association has this advice: Whitefly is one of gardenings most difficult pests to control. The little fly-like insects with white wings hang out on the undersides of leaves where they multiply rapidly in warm weather. Whiteflies damage leaves and suck sap from the plant; if the infestation is severe, this can lead to death in young plants and decline in older ones. Persistence is the key to control. I have had good luck controlling these pests by spraying them with a mixture of dishwashing liquid, such as Palmolive with lemon, and water. A good squirt of soap to a gallon of water should do the trick. Place the mixture in spray bottle and spray leaves, both sides well, at least twice a week when the flies are active. You may need to continue this treatment for many weeks. Spray on an overcast day, in the very early morning or late afternoon to avoid damage from the sun. Also worth a try: Yellow sticky tape placed near plants — Yellow colored traps that attract insects with their color and snare them with a sticky substance. Release Encarsia Formosa, a tiny parasitic wasp which will eat them. Available from some nurseries and seed companies. Pyrethrin spray — an organic pesticide made from chrysanthemums. Encourage Hummingbirds. They love to dine on whiteflies. Hang feeders and keep them clean and full of simple syrup (a mixture made from 1 part sugar dissolved in 4 parts hot water). Plant flowers they adore, those with tubular flowers such as fuchsia, foxglove, salvias, bee balm. Good luck!
I planted a new salvia in a pot near my hummingbird feeder because I knew the birds liked Salvia-- but that's what got infested with whiteflies. The agastache right next to it seems to be unaffected. Unfortunately, the infestation of the salvia seems enough that the one or two birds I've got visiting the feeder may not be able to make a dent...
I'm also concerned that a soap treatment might adversely affect the hummingbirds. Someone suggested a sugar solution would cause the flies to stick to the plant-- and that wouldn't seem to be a problem for the hummingbirds-- a better option than soap? I've used Dr. Bronner's peppermint soap on my apricot tree for aphids in the past with some success, but hesitate to use it at this point since I do have a few hummingbirds at feeders in the area now...
I use it also. If you spray in the evening, everything will be dry by morning and not hurt any beneficials or birds