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Michael McDonough
Mueller Community

Posts: 6
Joined on September 5th, 2013
by Michael McDonough on June 15th, 2014

Is there anyone out there who has had success getting rid of thrips on their roses? We tried the recommendations from Shoal Creek Nursery and Natural Gardener but nothing seems to work, so far.
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Mueller Community

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Joined on September 7th, 2007
by ret1ree00 on June 16th, 2014

Success-not much. I have been growing roses for a number of years and Thrips are almost impossible to control. They have a 2-3 week lifecycle and once in the rosebud almost impossible to treat. I often deadhead the damaged rosebud anyway and throw them in the trash not on the ground.

There are some preventive measures you can do that I believe help but once they get into the rose bud only a systemic insecticide would work and it does more harm to other good bugs. I have also read Orthene does control Thrips but again it is toxic to other insects.

If you have a heavy infestation I would spray a soap solution on the rose buds every three days until you get control. It may take quiet a bit of time. I have a formula that my entomologist brother gave me (½ cup Polmolive Green dish soap, 2 tablespoons olive oil, 2 tablespoons Miracle Grow mixed into 100 oz. water). Use a pressure sprayer so you can get under the leaves for mites, or a bottle sprayer if using just for the rosebuds.

Neem oil also helps in that it makes the insect forget to eat.

Lacewings are the better solution in general because they are predators that eat the larva of aphids, thrips and a host of other bad insects. Lacewings and Lady bugs can be purchased on line. You can get either the eggs or live insects. A healthy population of lacewings and lady bugs in the spring are always a good sign.

I think persistence is the key.
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Michael McDonough
Mueller Community

Posts: 6
Joined on September 5th, 2013
by Michael McDonough on June 17th, 2014

Thanks for the info. I'll try the soap solution and try to stay on top of the situation.
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