Stop These Bonsai Killers: Top 6 Pests and How to Defeat Them!
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- Опубликовано: 8 сен 2024
- There are a number of insect pests and nuisance weeds that want to destroy your precious bonsai trees. Keep watching and not only will I help you to identify them, but show you how to deal with them.
Scale insects
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Scale insects are small, sap-sucking pests that attach themselves to plants, including bonsai trees.
They can cause significant damage by weakening the tree, leading to yellowing leaves, stunted growth, and in severe cases, branch dieback or death of the plant.
They notably excrete a waxy protective substance beneath their domed shells.
To eliminate scale insects, it is essential to manually remove them using a soft brush or cloth, apply horticultural oil or insecticidal soap to suffocate the pests, and ensure good overall tree health to prevent infestations.
Regular monitoring and timely intervention are crucial for managing these pests effectively
Woolly aphids
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Aphids
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Aphids are small, sap-sucking insects that infest bonsai trees, feeding on their foliage and tender stems. They pose a problem for bonsai cultivation by weakening the trees, causing distorted growth, and excreting honeydew, which can lead to sooty mold growth. This not only affects the tree's health but also its appearance, making effective aphid management crucial for maintaining bonsai vitality.
To combat aphid infestations on bonsai trees, regularly inspect the plants and use a strong water spray to dislodge them. Introduce natural predators like ladybugs or use insecticidal soaps and neem oil for chemical control to help prevent aphid infestations. Surfactant sprays will suffocate them and their eggs.
Vine Weevils
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Wine weevils, particularly the vine weevil (Otiorhynchus sulcatus), pose a significant threat to bonsai trees due to their destructive feeding habits. While adult weevils feed on plant leaves, creating noticeable notches along the edges, it is the larvae that cause the most harm.
Living in the soil, the larvae feed on plant roots, leading to a severe reduction in nutrient and water uptake.
For bonsai trees, which have compact and delicate root systems, this root damage can be devastating, resulting in wilting and potentially killing the tree. To protect bonsai from vine weevils, it is crucial to monitor for signs of adult feeding damage on leaves and to inspect the soil for larvae, especially if the tree shows signs of poor health.
Effective management includes using biological controls like nematodes, chemical treatments specifically targeting vine weevils, and replacing infested soil. Regular vigilance and appropriate treatment measures are essential to ensure the health and longevity of bonsai trees.
Liverwort
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Liverworts are small, non-vascular plants that thrive in moist, shaded environments and are often found growing on the soil surface or the trunks of bonsai trees. They have a simple structure, consisting of a flattened, leaf-like body called a thallus.
In bonsai cultivation, liverworts are considered a nuisance because they compete with bonsai for nutrients and water, especially in the confined space of a bonsai pot. Their presence can indicate overwatering or poor drainage, conditions that are detrimental to bonsai health.
Therefore, managing liverwort involves improving soil drainage, reducing moisture levels, and physical removal of the plant.
Pearlwort
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Pearlwort (Sagina procumbens) is a low-growing, perennial plant that resembles moss and thrives in moist, compact soil conditions. It produces small, white flowers and has a dense, mat-forming growth habit. In bonsai cultivation, pearlwort is problematic because it competes with bonsai trees for nutrients, water, and light. Its rapid growth can quickly cover the soil surface, leading to significant competition for resources.
Additionally, its dense growth can be aesthetically unappealing and challenging to remove once established.
Effective management involves regular monitoring, maintaining proper watering practices, and manually removing the weed to ensure the bonsai's health is not compromised
Enjoy 🙏😁🌳
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If you enjoyed this video then please like, share and comment. To be notified of future videos like this then please subscribe:
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I think one of my trees might have pearl wart.
It looks like it has nice little flowers but after watching this I’m going to remove it asap
Very helpful video thank you Jason
It’s more of a persistent nuisance than a major threat to the tree. Because it has deep roots it ends up competing for fertiliser and water with the tree.
Cabinet of horror 👻 Thanks Jason, now I know that it is pearlwort what I have to remove constantly from many of my pots… 😬 You seem to catch all that stuff right in time 👍 Your trees are looking fantastic. Enjoyed the video. Cheers 🙋♀️ Martina
Thank you Martina. A couple of my trees are often overgrown with the stuff. You turn your back for five minutes…
Very informative and helpful, thank you Jason, fortunately at the moment I’m pest free (insect wise) have some liverwort that I keep on top of.
Cool. Mostly recurrent issues here with woolly aphid on my crab apple tree, and scale insects seem more active this year.
Awesome information and photography! Spring is always the worst for caterpillars in my area. This year has been a bonus year for aphids and thrips though. In any other setting than bonsais, liverwort are the most primeval cool looking plants. I loved the close-up vids!
Thanks Sue. Woolly aphids and scale insects seem very active for me this year. Yes, liverwort look fascinating but not a good thing in your bonsai soil as they thrive in damp soil and indicate drainage issues.
Great timing for this video Jason. I have a stunning Elizabeth magnolia tree, which I just discovered is covered in magnolia scale. Like horror movie covered. I have an arborist coming out in a couple of days. I will do anything to save that tree. These suckers (literally) will grow up to 1/2 inch. I'll show you the tree in the video which will be coming soon. I have been doing some massive gardening projects still. My little elm is doing great in the winning bonsai pot!
Scale can be horrible to deal with. I recently lost a few cuttings to scale... Fortunately, I was able to save the trees.
Thanks. Fortunately there are only a handful but they are horrible creepy things. 😁
Yes indeed - there are many types of diseases and pests that can and do affect or destroy our bonsai. You nail many of the primary ones here. I’ve found on the grow weed varieties that you have to make sure you got ALL OF it and any rooting aspects are removed. Thank you for yet another informative bonsai video.
Thanks Jeff. Yes, Pearlwort is particularly annoying and persistent. Just spent an hour slip potting two Chinese elms just to remove the stuff from the surface of the soil.
@@TheBonsaiGarden yep. Had an experienced bonsai practitioner help me do that a year or two ago. Hey everyone, those [grumble-grumble] pesky green things have deep roots many times.
Excellent video Jason! Thank you!!
Thank you Lisa 🙏
Good stuff Jason! Great information as always.
Thank you for your kind words Justin.
Really good informative video Jason, good job. 👍🏼
Thanks, I appreciate that. 🙏
The horror movie sounds! Epic!
😂😂👍
Excellent video!!!
Greatly appreciate that 🙏
You must have been with me yesterday whilst I was doing my apples!!! I filled my Jason Pest Bingo Card in one session :)
Thanks🤝
🙏
I think most weeds under bonsai look beautiful, looks like the forest floor but of course they need to be removed
Yes, I understand what you mean. They can look like vegetation growing and give a certain authentic feel to the trees - but of course they can also be a problem.
👍👌🙂
🙏🙏🤗
I have a clear film on my orangeola JM leaves. Not all leaves, just some. Any ideas what that is?
Sounds like honeydew sap from aphids.
@@TheBonsaiGarden thank you. I'll have to check it thoroughly. It looks over watered as well, I don't think it is... I have 9 other maples With no problems. Neem oil okay to use if that's the case?
Soapy water is usually sufficient.