In most cases, white spots on Cacti are caused by a pest infestation. The white spots are protective shields of mealybugs or scales. Another reason for white spots on cacti can be fungus growth due to powdery mildew or the necrotic spot virus.
How do I get rid of the white stuff on my cactus?
When these white sticky spots first start to appear it is best to spray them off the cactus pads with a power nozzle attached at the end of your hose. If the infestation begins to get out of control, I suggest treating the areas by scrubbing them with insecticidal soap or unscented dish soap.
What is the white cotton stuff on cactus?
Cochineal is a scale insect and is found on prickly pear cactus, Opuntia engelmanii. As a rasping, sucking insect, it feeds on the tasty juices of the cactus. It produces a cottony white covering to protect itself from predators.
What does cactus fungus look like?
They may be round, irregular, raised, flat, and any other shape. Many are discolored but, again, the tones can range from yellow to brown and all the way to black. Some are corky, while others are weepy. These may ooze brown, rusty, or black fluid, evidence of severe infection.
What is a natural remedy for mealybugs?
Mix 1 cup of rubbing alcohol with few drops of Dawn dish soap and 1 quart (32oz) of water. Pour the solution in the spray bottle. Spray the whole plant, not only where mealybugs are visible. Spray leaves well, top, and under and stems.
Why is my cactus covered in white fuzz?
If you spot white fuzz on your cactus plants, you’re most probably dealing with a pest infestation. As the population of these bugs grows on your cacti, they gather and group together. Since they have cotton-like wax surrounding their bodies, this clumping together appears like white fuzz.
Why is my indoor cactus turning white?
If the cactus has been watered too much or not enough, the plant can turn white. This is because cacti require less water than most plants. … If the cactus has been overwatered, it will turn white and start wilting as the moisture evaporates from its leaves.
What is the white stuff on top of my plant soil?
A white mold growing over the surface of houseplant potting soil is usually a harmless saprophytic fungus. … Overwatering the plant, poor drainage, and old or contaminated potting soil encourage saprophytic fungus, which feeds on the decaying organic matter in soggy soil.
What is the best treatment for mealybugs?
On small infestations on houseplants, a 70% or less solution of isopropyl (rubbing) alcohol in water may be dabbed directly on mealybugs with a cotton swab to kill them or remove them. Test the solution out on a small part of the plant 1 to 2 days beforehand to make sure it does not cause leaf burn (phytotoxicity).
How does vinegar get rid of mealybugs?
Take 1 ounce of apple cider vinegar and mix it with 2-3 ounces of water. Pour this liquid into a garden sprayer and spray in the evening. Apple cider vinegar stops the molting process of mealybugs, and will also help to kill the majority of pests on the plants.
How do you treat mealybugs on cactus?
Use 70% Isopropyl Alcohol
Killing mealybugs with isopropyl alcohol is usually the most effective way to get rid of mealybugs bugs on your cactus. Use 70% isopropyl alcohol (more commonly known as rubbing alcohol) in a spray bottle and spray every bug and white fuzz spot you see.