Cactus coreid bugs, which can do serious harm, feed on cacti, most notably the prickly pear. The first stage of the bugs’ infestation results in unattractive circular patches on the pads of the cactus. Large areas of weak or dead cactus, black blotches, and a yellowed, pittish appearance on the pads are just a few examples of the more severe damage that can result from a protracted infection. Fortunately, it’s not too difficult to get rid of the bugs, but you should do it as soon as you notice an infestation to save your cactus from total destruction.
Remove the bothersome coreid bugs from the cactus’s surface. Use the hose attachment, then briskly run the end over the part of the cactus where the bugs are hiding. Since there are often big colonies of the pests at the cactus’ base, pay close attention to it. Additionally, look underneath the cactus’ paddles. As an alternative, manually remove the pests from the cactus.
Put the bugs in a bucket of warm, soapy water or drown them in water to destroy them. Place the dead pests in a yard corner or pour them down the drain.
Apply a pesticide. Consult your neighborhood nursery for advice on which plants might work best based on the sort of cactus being invaded. Because some insecticides are only effective at particular stages of the life cycle, you need also think about what stage the pests are in. If you’re worried about using dangerous pesticides in your yard, several nurseries carry all-natural insecticides.
Cactus bugs: how do you get rid of them?
Even if there are additional pests that may harm your succulents, the majority of infestations will be caused by one of these four bugs.
Mealybugs
The fluffy, white insects known as mealybugs are typically found in big numbers. Although you might mistake them for a spiderweb up close, they have a distinct, cottony texture.
They adore living in cracks and other secret, safe places. Check the areas of your succulents where the leaves meet the stem; this is a preferred location.
Fortunately, mealybug infestations are fairly simple to manage. You can just unpot the succulent and thoroughly rinse it out with a strong stream of water if the infestation isn’t too bad. That ought to be sufficient to remove all of the mealybugs.
You should repot the plant in new soil because certain species lay their eggs in the soil. If you’re unsure whether your soil is contaminated, you can bake it at 200 degrees for a couple of hours to eliminate any hidden pathogens.
Apply rubbing alcohol to the affected areas of the plant if water is ineffective or you don’t want to repot the plant. The insects will be instantly killed by regular 70% isopropyl alcohol, but your succulent won’t be affected at all. Try spraying the plant liberally with alcohol after filling a spray bottle with it.
Scale
On the plant’s surface, scales take the form of rounded or oval bumps. They are very little, measuring no more than one centimeter or so, and are always dark in color.
It should be immediately clear why these insects are called scales since they are protected by a hard, smooth shell. When they reach the adult stage, they choose a location (typically along the stem) and stay there for the rest of their lives. They are fairly resistant to chemical treatments and almost impervious to predators.
However, they usually spread very slowly. If you notice a few of them on your plant, you may remove them quite quickly by scraping them off with a blade or your fingernail. If there are numerous, you should use a potent insecticide.
The solution is neem oil. Neem oil is frequently marketed as an extract and needs to be diluted before usage, so be sure to read the instructions carefully. Additionally, keep in mind that if the oil is on the plant and under strong, direct sunshine, it could result in sunburns because it is an oil.
Neem oil should therefore be used at night. That also lessens the chance of accidentally catching helpful bugs, most of which are active during the day.
Spider Mites
Spider mites are extremely hardy because they can overwinter in the soil and reproduce swiftly. They flourish in the same hot, dry environments that succulents do, unlike the majority of pests.
The tangled, wispy cobwebs that spider mites build around themselves to ward off predators make them very easy to recognize. They come in a variety of hues, including brown, black, and red, and many of them are so tiny you would need a magnifying glass to see them. Look for webs on the undersides of leaves, where they almost always congregate.
Although they pierce leaves to get the juices, the damage is done gradually. For a plant to actually be in danger, spider mites would need to completely cover it. To identify spider mites, look for random spots of yellow, brown, or gray scarring on leaves.
Washing away their protective web covering with vigorous water is the first step in getting rid of them. Apply neem oil next as you would for scaling. Treatment with isopropyl alcohol is also effective. An additional choice is to use insecticidal soap, which you can either purchase or manufacture by combining a few drops of dishwashing detergent with a quart of water. Use a spray bottle to liberally apply the solution.
Fungus Gnats
In reality, fungus gnats are merely a nuisance and not even a pest. However, they are very common and should be mentioned.
They resemble fruit flies in every way, more or less. perhaps a little smaller When you brush by them, they will occasionally take off in a swarm when they are resting on the leaves of your plants.
The adult gnats you see flying around have a relatively brief lifespan and barely consume any food. They lay their eggs in wet ground. The eggs develop into larvae that primarily consume decaying matter but may eat new, sensitive roots if given the chance.
Although fungus gnats are not very harmful to your succulents and cacti, they are a sign that your plant is overly damp. Give the plant extra time to dry out in between waterings or switch out the soil with one that is looser and faster draining.
It is quite simple to get rid of fungus gnats. The soil will eventually die if you thoroughly dry it up (without any water for around two weeks). The eggs and larvae will shrivel up, and the adults will eventually pass away. If you place a fan to blow over the plant, the adults won’t be able to return and deposit eggs because they are extremely slow flyers.
Water your plant with an alcohol or insecticidal soap solution and fully wet the soil for a quicker fix.
That is the quick-and-dirty method for removing bugs from your cactus and succulents. Do you have any questions concerning any other pests? Do you require more information? Tell us in the comments section below!
How can I get rid of nymphs from cacti?
Although cacti and other succulent plants are hardy, they are not immune to pests and diseases. When problems are discovered early on, they may usually be fixed or at least mitigated to bearable levels. The knowledge we have gathered should aid in early diagnosis of the common diseases and pests found in western Colorado. We’ve listed a few therapeutic choices, but they’re not all-inclusive; rather, they’re just approaches that have helped club members. Remember that healthy plants are more resistant to assault than stressed ones, so your first line of defense should be to provide your plants the care they need, including the right amount of water, soil, fertilizer, and positioning.
Cactus Bugs
Chelinidea vittiger are “true bugs,” members of the order Hemiptera. They have piercing/sucking mouthparts for ingesting sap (phloem), and you can find them drilling the weak areas of a variety of our outdoor cold-hardy cacti, including flower buds, newly sprouting cholla, immature opuntia pads, as well as older pads and cactus parts. Don’t ignore them; if there are enough of them, the cactus will perish. Their feeding behavior on opuntia causes unsightly circular lesions on the pads (image at right). The difficult-to-find cactus bug eggs are placed on the spines of cacti.
Nymphs can be treated with insecticidal soaps or horticultural oils, but adults are more difficult to manage. A product containing the neonicotinoid imidacloprid performs effectively as a foliar spray or soil drench for systemic treatment and prevention. Systematic control and some contact mortality will be provided by this. Applying imidacloprid to a plant before or during bloom is not recommended since it can get into the nectar and damage pollinators. This UCDavis Integrated Pest Management website on Imidacloprid has more details about the drug. Acetamiprid, a different neonicotinoid, is more environmentally friendly than imidacloprid and can be used as a foliar spray. It does not have a soil drench label. Additionally, you should remove and kill any bugs you spot on the plants. As cactus bugs, especially the adults, are wary and nimble movers and are excellent at hiding in inaccessible sections of the plant and in plant litter, hunting them down may be incredibly difficult and irritating. Use barbecue tongs shaped like spoons to capture, enclose, and sweep spiky plants into something like a kitchen storage container so you can crush them. They emit a foul smell. Try giving the plant a light watering if you are aware that cactus bugs are present but cannot locate them. The bugs will often climb the plant until they reach the top.
Why do the bugs on my cactus exist?
Cacti and succulent houseplants occasionally experience insect pests, but the majority of issues are bacterial or fungal illnesses brought on by overwatering. Scale, mealy bugs, and root mealy bugs are the three most prevalent pests. Pests like spider mites and fungus gnats are less frequent.
What causes cactus mealybugs to die?
When you detect mealy bugs on your succulents, the first thing you should do is quarantine the affected plants and relocate them away from other plants. Check the healthy plants for any indications of mealy bugs.
After that, be ready to clean your contaminated plants by removing them from the pot and giving them a thorough rinsing under running water. In hot, soapy water, wash the pot. Replant with fresh soil after allowing the plant and pot to dry out. Old dirt should be disposed of in the regular trash, not the green bin.
If you don’t instantly have ready-mix succulent soil at your home, you can put the soil in an oven-safe container covered with foil and bake it for at least 30 minutes, or until the soil reaches 180 degrees Fahrenheit. After letting cool, plant again. Since there may still be mealy bug eggs in the old soil, we advise getting new soil.
Now let’s get to the most crucial step: mealybug elimination. Pesticides made of chemicals are generally the first thing that springs to mind. We don’t advise using them, though, as some of them can be highly damaging to succulents. Here are some secure choices we’ve tried and think are really helpful:
Neem oil and soap mixtures or rubbing alcohol (isopropyl alcohol) come first. The cheapest and most efficient approach for controlling aphids, mealybugs, and spider mites is to use 75 percent rubbing alcohol. Simply give the succulents a good spraying and leave them. The bug will start to turn brown, which indicates that it is dead. The plants won’t be harmed by the alcohol because it will entirely evaporate in a short period of time. Perform this each week until you no longer notice any bugs.  
Another secure insecticide that can be applied directly to outbreaks is neem oil. It has the ability to instantly eliminate all stages of mealybugs. Neem oil at a concentration of 5% in water is combined with a few drops of soap before being sprayed all over your succulent. Keep in mind that using concentrated neem oil could burn your succulents.  
If you don’t have a spray bottle, you might paint-brush any area where mealy bugs are present. After a few hours, water the plant to remove the dead insects. You can readily find rubbing alcohol and neem oil online or at your neighborhood pharmacy. To prevent water stains or sunburn when using neem oil or rubbing alcohol, be sure to keep the plant out of direct sunlight. For a few days, keep them away from the window and direct sunshine.  
If there are still some mealy bugs on your plant, check it again and continue the procedure for a few days. Then, as a preventative step, spray once again after a week. Neem oil can also be sprayed into the soil to eliminate any bugs or eggs that may be lurking there. Put the plant back in its original location and continue inspecting every three weeks if mealy bugs don’t recur after thoroughly checking and spraying for a few weeks.
Neem oil and rubbing alcohol are relatively secure, but there is a danger they could harm your succulent.
So we advise utilizing ladybugs as another natural cure. Yes, you heard correctly! These adorable ladybugs are all-natural enemies of mealybug and other troublesome pests. However, we advise utilizing ladybugs only as a preventative measure and when your plant is in the early stages of infestation.
What can I use to remove mealy bugs from my cactus?
Mealybugs can be readily removed if you catch them early, before they have a chance to multiply.
Scrape the mealy insect off your cactus by using a q-tip in rubbing alcohol that is 70 percent strength.
To be sure, examine the plant from top to bottom. For a few more days, check the plant daily to make sure no new pests have arrived.
For each mealybug, use a different side of the q-tip because you don’t want to distribute them more than required.
You will need to spray your plant if the mealybugs are more numerous and cannot be removed one by one.
Before you can totally get rid of these pests, you will need to repeat treatment multiple times to destroy them in all stages.
Using a Homemade Dish Soap Spray
Making your own homemade mealybug spray from things you probably already have on hand is another option.
Neem oil, if you can find it, should be added to the combination for a far better success rate.
Your plant will receive a layer of protection from neem oil, making it more difficult for insects to eat through it.
With Blue Dawn dish soap and a 2 percent soap to water ratio, I’ve had the most results.
For instance, my spray bottle holds 650ml (or 20 oz), so I added 13ml (or half an ounce) of dish soap before adding water to cover the remaining space.
Use distilled or bottled water to prevent mealybugs from benefiting from the minerals in your tap water.
You want to make sure you get every area of your cactus since these small creatures can hide in crevices and crannies. Spray this mixture immediately on the surface of your cactus.
If there are still some bugs present, repeat the process again in a few days. To remove any remaining soap, spritz the cactus with distilled water after the bugs have all disappeared but don’t use any soap this time.
Avoid using too much soapy water because dish soap is still a detergent and might harm your houseplant if used excessively.
Use 70% Isopropyl Alcohol
The best method for getting rid of mealybugs on your cactus is typically to kill them using isopropyl alcohol.
Spray every bug and white fuzz spot you notice with 70% isopropyl alcohol (often referred to as rubbing alcohol) with a spray bottle.
Avoid using alcohol that is 90% strength since it will flash off too rapidly and not be as effective.
And if you opt for this strategy, be careful to keep your plant away from hot or direct sunlight to prevent burning. Spray ideally in the morning or at night.
The mealybugs are almost instantly killed by the isopropyl alcohol, which almost dries them up on touch. This will only work if you spray every single bug you see, just as the soap water method.
However, be careful with the alcohol; too much of it can harm the plant.
It might be better to dip a q-tip in the isopropyl alcohol and kill the mealybugs one at a time if you have caught them early and are certain that there are only a few bugs.
Nowadays, it can be challenging to get isopropyl alcohol, so if you can’t, try the dish soap and neem oil method first.
As there are probably other components in hand sanitizer that could be detrimental to your plant, I wouldn’t advise using it to get rid of mealybugs.
Systemic Insecticide Spray
Finally, you can buy systemic pesticide (bonide granules) at your neighborhood garden center or greenhouse to eradicate mealybugs from the inside out. Mealybugs become poisoned by the fluids.
In essence, you’ll water your cactus while using the pesticide, which works more like an antibiotic than a topical application like the other two techniques.
I advise applying a spray (either the soap mixture or rubbing alcohol) together with the systemic pesticide to get rid of mealybugs permanently.
This is because mealybugs may still be present in your soil, making it preferable to attack them from all sides.
Ideally, repot your plant in fresh soil if you can to ensure that no bugs or eggs are still present.
Other Methods That Might Get Rid of Mealybugs
You might try taking the natural approach and introducing other bugs that will devour the mealybugs if you have mealy bugs on your outdoor cacti.
Ladybugs will devour them, and mealybugs and aphids are both consumed by the larvae of the Green Lacewing.
To eliminate bugs, larvae, and other pathogens, some people bake their soil in the oven.
You can sterilize a small amount of soil by putting it on a baking sheet and roasting it in the oven for roughly 45 minutes at 175200 degrees Fahrenheit.