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This article was co-written by Lauren Kurtz. Lauren Kurtz is an expert in nature and horticulture. Lauren has worked for Aurora, Cporado, managing the Water-Wise Garden at Aurora City Center for the Department of Water Conservation. She earned her bachelor’s degree in Environmental and Sustainability Studies from Western Michigan University in 2014.
There are 12 references cited in this article that you can view at the bottom of the page.
This article has been viewed 5,829 times.
There are over 1,000 species of powdery mildew, an insect that resembles a caterpillar or a small white aphid. They congregate and multiply in large numbers on the undersides of leaves. The larvae and adult beetles damage the plant by directly sucking the sap and transmitting disease to the plant. Once the powdery mildew is heavily infested, it is very difficult to eradicate. You may need to apply several measures over a period of several weeks, even having to prune the tree.
Steps
Use natural solutions
- Dispose of the trash bag in the vacuum cleaner when it is full of pollen. Put the garbage bag in the vacuum cleaner into a plastic garbage bag and tie it up, then put it in the freezer for at least 24 hours to kill the insects. When all the chalk beetles are dead, you can empty the trash bag in the trash. [2] X Trusted Source University of Missouri Extension Go to Source
- Prune only to the extent that allows the healthy state of the tree to be maintained. With weak plants infested with powdery mildew, only the most heavily infected leaves should be removed. With sturdy trees, you might consider cutting infected branches close to the trunk to prevent spread. [4] X Trusted Source University of California Division of Agriculture and Natural Resources Go to source
- Be sure to dispose of infected branches properly. Burn or isolate infected branches in sealed bags. If you don’t handle it carefully, the powdery mildew can re-infest. [5] X Research Sources
- Only the larval and adult stages are actually harmful to the host plant. However, younger beetles will also develop into more harmful forms if left untreated.
- To determine the best time frame for treatment, you need to examine the lifespan and developmental stages of the specific beetle. There are many species of beetles – including Silverleaf, Fig, Greenhouse, and Bandedwing species; Each species has a different lifespan.
- If using a more concentrated soap solution, you should wash the plant late in the day to avoid burning the foliage.
- Be careful when bringing foreign insects into the garden. Predators can deal with a chalk bug infestation, but it’s also possible that you’ll soon find yourself dealing with a whole lot more new bugs! Please research carefully before doing this.
Use traps
- If you make your own trap, you may need to reapply the glue once it dries. For example, glue can dry within tens of minutes or hours. Machine oil or Vaseline cream may not work as quickly, but may keep the stickiness longer.
- Be sure to remove the trap if you are using a spray method or using a natural predator to catch the beetles.
Chasing chalk beetles
- Potted marigolds and marigolds are not effective at repelling powdery mildew. Make sure to use the right plants! If you’re not sure, you can go to a nursery and ask about symbiotic plants that repel powdery mildew.
- Consider using a natural oil, such as neem oil.
- This step requires you to be very careful when watering the plant. Trees covered with plastic material need to be watered with a drip irrigation system.
- Do not use the coating in hot weather. Plants will get hot if covered too much.
Use chemicals
Warning
- You should process several times to maintain the effect.
- Pesticides can be effective but are also toxic when swallowed. Many insecticides used to control powdery mildew are often associated with deaths and significant reductions in honeybee populations, an important factor in pollinating flowering plants.
This article was co-written by Lauren Kurtz. Lauren Kurtz is an expert in nature and horticulture. Lauren has worked for Aurora, Cporado, managing the Water-Wise Garden at Aurora City Center for the Department of Water Conservation. She earned her bachelor’s degree in Environmental and Sustainability Studies from Western Michigan University in 2014.
There are 12 references cited in this article that you can view at the bottom of the page.
This article has been viewed 5,829 times.
There are over 1,000 species of powdery mildew, an insect that resembles a caterpillar or a small white aphid. They congregate and multiply in large numbers on the undersides of leaves. The larvae and adult beetles damage the plant by directly sucking the sap and transmitting disease to the plant. Once the powdery mildew is heavily infested, it is very difficult to eradicate. You may need to apply several measures over a period of several weeks, even having to prune the tree.
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