How To Rid Plants Of Leaf Miners: A Guide For Home And Gardeners
The following are some tips to rid your plants of leaf miners:
1) If you have citrus trees or any other citrus tree, remove all the leaves from these trees and place them in plastic bags.
Put them into a dark location where they will not be disturbed for at least two weeks. (If you live in Florida, you may want to put them in a refrigerator.)
2) If you have other citrus trees, such as lemons or limes, then use the same procedure.
You may wish to leave some of the smaller leaves on these trees because they are easier to identify. Leave the larger leaves alone; it will only attract more insects.
3) Do not try to kill all of these pests with pesticides!
Insecticides work best when used on large areas. They are very expensive and need to be applied frequently. When using pesticides, always follow label directions carefully.
4) If you have roses, then spray them with a systemic insecticide like Imidacloprid or Clothianidin which will kill most leaf miners but not all of them.
These chemicals must be sprayed every three months for the best results. For the best leaf miner control, spray your roses before they actually hatch out on the leaves.
5) Always wear protective clothing and chemical-resistant gloves.
Also, thoroughly wash all tools and containers used in mixing and applying the insecticide. Follow safety precautions as listed on the container.
6) Spray all the leaves for three to four weeks to kill leaf miners.
After this time period, wait another three weeks before spraying again.
7) In your area, leaf miners usually hatch out just before or during the month of July.
Watch for them by looking for silvery spots on the top side of the leaves in your rose bushes.
8) Once you have located the leaf miners, then you can start to spray the insecticide on the underside of the leaves.
Remember to continue spraying for three to four weeks and then wait another three weeks before spraying again.
9) You can place small pieces of cardboard among the roses and look for the leaf miners as they travel across the cardboard.
10) If you grow vegetables in your garden, such as tomatoes, peppers, and strawberries, then you can use the same insecticide to kill leaf miners. You may need to reapply it every two weeks or so, depending on the severity of the problem.
11) For plants that are not close to a water source, you can spray them with a common household soap to trap the leaf miners. This will kill only the leaf miners that walk across the foliage however.
12) A good way to control leaf miners is to clean up all the old leaves around your yard and dispose of them. This helps eliminate places for leaf miner eggs to hatch out. It also stops the spread of leaf miner infestations from one plant to another.
13) Always check new plants that you bring into your yard for signs of leaf miners as they can hide on the leaves.
14) If you see a heavy infestation, then you can try to wash the insects off the plant with a strong stream of water or blast them off with a pressure washer.
You should keep an eye on your rose bushes for signs of leaf miners. They are very small and make their homes inside the leaves. They can cause your plant to weaken and die.
We hope you will keep these tips in mind as you continue to have success with your rose garden. If you have any questions, please let us know.
If you have found this report useful, please visit our sponsors to show your support.
Go from Leaf Miner Control to Organic Gardening Information: At-A-Glance
Return to Organic Gardening Home Page
Sources & references used in this article:
Leaf abscission: induced defense against pests or response to damage? by P Stiling, D Simberloff – Oikos, 1989 – JSTOR
Adaptation of leafminers to their natural enemies: a tritrophic interaction. by LJ Norda – 2010 – fse.studenttheses.ub.rug.nl
Biological Performance of Certain Agrochemicals and IPM Program against Leafminers, Liromyza trifolii Burg on the Garden Bean by ASA Saad, HA Mesbah, AM Kordy, M Khames – journals.ekb.eg