Help!!! Tough White fly infection on Hibiscus

wliu57May 14, 2006

I am fighting with white flies on my four Hibiscus almost a year. I tried earthworms and garlic fermented water (all the info. from this forum). I used two bags of the earthworms for the treatment. At begining, it seems effective. And later, it seems not so effective. The white fly not only damage my hibiscus, but also damage my Michelia ALBA, which is very precious tropical plants.

I am really tired on fighting with this bug.

Are there any other effective ways to deal with white fly?

Thank you all!!!

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taitai(Z5 WI)

I can not tell from "My Page" where you live, and if these plants are indoors or out. Hibiscus and Fuchsias are two favorites of Whiteflies. To get rid of White Flies you must somehow break the life cycle. The fly itself does not cause as much damages as the hundreds of larvae they produce. Its the nymphs on the leaves that are Sap Suckers and cause the damage to the plants. In the north, cold temps control Whiteflies outdoors. The problem is when you bring tropicals indoors.
Whiteflies are attracted to yellow and white. Most garden centers sell yellow sticky cards to catch some of the adult Whiteflies. These have never ended an infestation for me, but do help to control it. You need to attack the nymphs on the leaves.
Looking at the methods you have tried, it looks like you are trying "Organic" or "Naturally-Derived" methods. If this is what you want to use, sabadilla, neem, pyrethum or rotenone are naturally-derived. Remember "Naturally-occuring" does not always mean "safer". Rotenone is more toxic to humans than Sevin. I use an Insecticidal Soap outdoors with great success. "AS ALWAYS, READ AND FOLLOW LABEL INSTRUCTIONS"
Another great "Natural" method to control damaging insects in your garden is the attract native parasitic wasps and predatory beetles to your garden. Not all insects are bad. It might be something you would want to research.
This info is mostly from memory and hopefully mostly correct. I hope it gives you some ideas. Its what works for me. GOOD-LUCK!!!!

    Bookmark   May 15, 2006 at 1:19PM
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wliu57

Just a correction for the last post.

What I used is earthworm castings plus strong hose water.

    Bookmark   May 15, 2006 at 1:20PM
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jean001(z8aPortland, OR)

And if you're in FL, CA, or TX, the problem may be giant whitefly. If so, it's tough whitefly to manage.

So, tell us -- where do you live?

    Bookmark   May 16, 2006 at 1:44AM
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wliu57

Thank you all.

I am in CA, Orange County.

The hibiscuses are outside. Yes it may be gaint whitefly, since when I use hose water I sometime can see the adult whitefly, about 1 X 1 cm size or larger. There are lots of small whiteflies about 2 mm long on the surface of the leaves. I always tried to kill the gaint whiteflies. On the back of the leaves, there are lots of larvaes which makes the leaves yellow, or black, and drop.

I am really really tired to fight with the whitefly.

Thanks for any advices.

    Bookmark   May 16, 2006 at 11:47PM
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jean_1940

I live in SE North Carolina and have huge holes eaten in the leaves of my 2 hibiscus bushes. There are tiny little "WORMS" on the leaves I have seen very few white flies around the bushes. I have treated with a soap based spray but only helps a litte. Plesase Help!

    Bookmark   May 17, 2006 at 10:50AM
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watergal(z6/7 Westminster, MD)

I don't like using chemical poisons, but imidacloprid will really eradicate whitefly. You can buy it as a systemic or a spray. For a tough infestation, I would go for the systemic (I winter mine indoors in Maryland and that is the only thing that worked for any length of time).

Imidacloprid is the chemical that poisons whiteflies and a bunch of other nasty pests (does not work on spider mites - some people find it actually encourages spider mite infestation but I have not had that happen to me). Bayer has several products you can use - there is a tree and shrub drench that is a liquid you pour on the soil that lasts for about a year (!). There is a rose & flower spray but you must reapply more frequently.

Merit or Marathon is another brand name you can use. I bought some Marathon granules to use indoors (Bayer products are not labelled for indoor use but Marathon granules are.) These are harder to find as they are primarily sold wholesale.

None of these products are cheap but THEY WORK. Yellow sticky traps will help, regular spraying with neem oil will help too, if you don't want to go the chemical pesticide route.

    Bookmark   May 31, 2006 at 8:33PM
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jenny_in_se_pa(USDA7 Sunset 32)

I was also going to suggest yellow sticky traps. If you can put them on stakes around the plant to capture the adults, that would begin to reduce the egg-laying population. However if many other plants are infested, it might be a difficult battle.

    Bookmark   June 4, 2006 at 12:09AM
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tsmith2579(7B)

I don't advocate bringing back DDT, but why is everyone so dead set against using chemical insecticides? Bayer makes a Multi Insect Spray which doesn't smell, isn't too hash to the plant and works well. Since this is an ornamental and not a food source, I highly recommend it.

    Bookmark   June 4, 2006 at 9:48PM
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soxxyfox_yahoo_com

I found a solution to the white flies...I use the mosquito zapper "shaped like a tennis racket" to kill them

    Bookmark   February 7, 2011 at 7:37AM
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gamittasaA_lasd_org

i have a lovely hibuscus bush outside my door it produces lovely pink flowers almost year round. but this year half o the bush from the bottom to middle is invested in a white moss from flies. my friend sprayed malathian the other night. it stinks bad, but on the third day the bush is starting to look better. but there still are yellow leaves, just hate looking at yellow leaves. i hope this strong spray works.

    Bookmark   June 30, 2011 at 3:30PM
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Rubi471

I just bought potted hibiscus plants from Lows and put them on my porch (Dayton, OH)Long behold, I noticed that 2 hibiscus bushes do not bloom. Upon further inspection I found that they have all kinds of white and black color little worms, spotted leaves, and white little particles around their buds. I looked carefully at other hibiscus plants (2 trees, 3 small pots) and ALL of them have infestation! Should I try to treat them or just return to the store? Thanks in advance for any good advice!

    Bookmark   July 6, 2011 at 10:22AM
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warutledge

I am on Day 20 of the Giant Whiteflies War. Untold numbers of Giant Whiteflies have died under my thumb. I have removed infected leaves by hand, folding them in half, literally grinding them to powder. I have a stool and sit, like a dark samurai in a Kurosawa film, looking up at the leaves of my hibiscus.

This plant lives under our lemon tree, outside. I was reluctant to use some sort of spray. I was very close in the early days. Initial tactics included blasting colonies with water from the hose. After this, I removed the egregious areas, trimming back nearly all leaves on half the bush. And still they came, but slower.

For 6 straight days I sat on my stool, removing leaves. Hiding leaves in the trash. Blasting with water the trash daily, as adults swarmed around it, threatening their next victim. I began to fear I was aiding the Giant Whiteflies, selectively breeding Whiteflies with quicker resources. Whiteflies that escaped before their execution. Surely they would breed, surely I would loose more leaves. I adapted my hunt.

I called on the Lemon Tree for help. Lemon Tree would donate a sturdy leaf to the fight. Using this leaf, I would first CRUSH the Giant Whitefly colony in its place. Only then, in the wake of the white powdered mess, would I remove the leaf. Only the best escaped. And I hunted their children.

In a few short days, I was down to only a few leaves of war as I hunted in the evening. I began to think like a Giant Whitefly. Northern California evenings are cool, slowing my prey. Every leaf was suspect of harboring rebel factions. If a colony turned up, it had neighbors. Sometimes I killed children. Mere teenagers, and younger, died.

Spotted leaves have returned green. Blossoms have unfurled. The Hibiscus claims victory. Even the Meyer has bloomed, heralding sweeter days before the Giant Whiteflies came.

And still I hunt. Today, it was only four. Some days it's none. I don't think I will ever stop hunting.

    Bookmark   July 14, 2011 at 12:53AM
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rosco_p(z6a ont.canada)

Enjoyed the novella and will be awaiting the sequel.Glad to hear that victory is yours.

    Bookmark   July 14, 2011 at 4:41PM
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