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Bugs Are Eating My Roses?


Gold Post Medal for All Time! 858 Posts
October 31, 2005
A rosebud covered in aphids.

Question:

I have some sort of little bug with wings that literally eats the center of the stem out of my rose bushes. It goes from the top of the cut off stem down the center and eats it leaving a hole. It is making each branch that it attacks die. I have put toothpicks in the holes, I have painted over the holes and they drill through it! What are these things? Thanks!
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Hardiness Zone: 6a

Answer:

You have some type of cane borer infestation. There are a few insects that bore into the cane ends of pruned rose bushes. The most common are two different types of predatory wasps.

One type of these wasps feed on aphids. The other type feed on the insects aphids prey on. Both types are likely to make use of already damaged or weakened canes for nesting purposes.

In either case, they are not likely your main problem, but rather a secondary problem arising from either a current or past infestation of aphids.

If you see your canes starting to be damaged, cut off the damaged part of the cane. The nests are usually fairly shallow, and can be repruned to a lower bud, or you can look for where the borer got in, and try sealing up the hole with wood glue (like Elmer's).

Once you reprune or seal up the holes, the wasps should try and seek out other food sources. To prevent cane borers in the future, your best bet is to be vigilant about controlling aphids.

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October 31, 20050 found this helpful
Best Answer

The brown bugs you are describing may be earwigs or pincher bugs, roll up a newspaper get it damp and leave near the rose bush base, in the morning, throw the damp paper roll in a baggie and tie off, the earwigs love damp/moist places and will crawl into the paper roll. do this until you don't have any more problems, usually takes a few days. Good Luck! Dee

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By Malinda Henkel (Guest Post)
October 31, 20050 found this helpful
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The brown bugs that get in between the petals are japanese beetles and they do alot of damage. You can buy japanese beetle traps at Lowes or Home Depot.

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They fly on the roses and eat their way through a flower.

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October 5, 2017

Can you tell me what bug is on this rose? Thanks.

Identifying Bugs on Roses - bug in center of red rose
 

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Gold Feedback Medal for All Time! 949 Feedbacks
October 10, 20170 found this helpful
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Roses can be a happy place for several types of bugs but most respond to home-made sprays.

  • Usually a soap spray is all that is needed to rid your roses of most common bugs.
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  • Soap Spray Mix ½ teaspoon mild dish soap and 1 teaspoon cooking oil in a 1-quart sprayer filled with water. Spray liberally over entire plant.
  • Here is an excellent site that has instructions for several DIY sprays for keeping roses healthy.
  • homeguides.sfgate.com/homemade-pesticides-roses-37091.html
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