Use a horticultural soap labeled for use on succulents or wipe leaves and stems with a cotton ball soaked in a 1 % solution of rubbing alcohol and water. Good cultural control and care will reduce the effect these pests have on your jade plant.
White spots on your Jade plant can be caused by excess salt in your tap water. If the water does have excess salt, the plant will expel the salt through the leaf pores. This will not harm your plant, but you may want to consider using filtered, rain, or distilled water if you want to avoid this spotting.
One of the most common reasons for black spots on succulents is overwatering. When succulents are watered too frequently or when they sit in waterlogged soil, they can develop root rot. This can cause black spots to appear on the leaves or stem, as well as other symptoms like wilting and a mushy texture.
Spider Mites
They spread with ease from an infested plant to another and can survive by sucking up sap from the leaves of the jade plant. Aside from the visible white spider-like webbings on the plant's leaves, spider mites are known to cause little dark spots on the plant's foliage.
A healthcare provider may think you have mites based on your health history and a physical exam. Intense itching and many small, red bumps, like pimples, are seen. Burrows may also be seen. These look like thin, wavy lines.
Mites cause damage by sucking cell contents from leaves.
Often, damage first appears as a stippling of light dots on the leaves; sometimes leaves turn a bronze color. Heavily infested leaves can turn yellow and drop off. Damage is usually most severe in hot, dusty conditions and on water-stressed plants.
In most cases, the black spots that you are seeing on your plant leaves are sooty mold. Sooty mold is a black mold that grows on plants that have been infested by insects such as whiteflies. The mold occurs when fungus grows from honeydew that is secreted by insects during feeding.
Solution: Remove the damaged leaves and throw them away. To kill the bugs, wipe the leaves with cotton balls dipped in rubbing alcohol, or use insecticidal soap. Repeat the treatment daily till the little buggers are gone.
These pests typically like hot and dry conditions, so increasing humidity by misting your plants regularly, or using a strong stream of water to wash off the adults, juveniles, eggs, and webs, can be very effective.
Here are some key points to look out for: Color – Real jade is a naturally dark green or light green stone with natural pattern varieties like white swirls and black dots.
This jade variety is known as flower green because the base is pea green and the patches of black inclusions look like flowers. Pea varieties have opaque green and white round spots that look like snow peas.
Stems and branches collapse. The interior tissues are soft and mushy. Discard affected plants. Scabby or corky areas develop on leaves.
Changes to the leaves are the first sign of an overwatered jade plant. Leaves can turn yellow and droop, and may eventually brown and drop off. Other signs include the leaves and stem becoming squishy and soft. The whole plant may also appear droopy.
Do this by mixing 1 tablespoon of potassium bicarbonate or baking soda with ½ teaspoon of liquid soap and 1 gallon of water. These blends must be sprayed onto the plant once a week for three to four weeks.
How to Water Jade Plants. Jade plants are succulents (they hold water in their leaves), so they don't do well when sitting in constantly moist soil, so let the top 1 to 2 inches of soil dry out between waterings. Indoors, this will probably mean watering once every 2 to 3 weeks—but be sure to check regularly!
Black spot—Diplocarpon rosae
This fungal disease of roses is usually a problem in California only in foggy or humid coastal areas. It can occur anywhere leaves commonly remain wet, such as where roses are sprinkler irrigated during the evening or night.
When a succulent is infected by powdery mildew, it will most likely look like it has been dusted with a classic white or grayish, powdery coating. It usually starts as circular, powdery white spots on the leaves and stems. And as the infection progresses, the spots will turn yellow-brown and eventually black.
1. Baking Soda and Dish Soap. Using a combination of baking soda, dish soap and some warm water can be a good way to get rid of the fungus from your succulents. You can also try using only baking soda and water or only dish soap and water.
Fungal diseases are the leading cause of leaf spots. As soon as you suspect trouble, inspect your leaves for moving insects. Then look closely at the spot itself. Spots due to fungal disease may have soft, wet-looking centers or signs of fuzzy fungal growth.
There can be a number of reasons why brown or black spots appear on your plant - usually on its leaves. Causes can include: a cold draft combined with too much water, sunburn due to excessive light exposure, overwatering/lack of drainage, insufficient lighting conditions or underwatering.
These strange bumps can be called “galls.” They grow in response to tiny insects, and they're very common. Through the process of photosynthesis, trees produce sugars which get stored in their leaves, stems, and trunks. Some insects take advantage of those sugars by feeding on them.
Spider mites prefer hot, dusty conditions and usually are first found on trees or plants adjacent to dusty roadways or at margins of gardens. Plants under water stress also are highly susceptible. As foliage quality declines on heavily infested plants, female mites catch wind currents and disperse to other plants.
Rubbing alcohol dehydrates and kills spider mites. Mix 1 part rubbing alcohol to 4 parts water in a bowl and use a clean cloth to rub the leaves of your plant with the mixture. You can also put this mixture in a spray bottle and spray the leaves. Repeat daily until the mites are dead.
This injury produces tiny white or yellow spots, giving leaves and needles a stippled or mottled appearance. As feeding becomes more severe, plants look bronzed or bleached and leaves may drop. Some plants, like azalea, may develop distorted leaves and flowers.