Remove infected plant areas, improve soil drainage and avoid overwatering the succulent. (6) “Aloe Mite”. Overwatering: all cacti are succulents and they store water in their cells. Mendon Cottage Books. Subscribe now and be up to date with our latest news and updates. Sooty Mold. Soil is another contributing factor. Although the diagnosis can be late, once identified, fungus gnats can be controlled with insecticide or larvicide application (7). Yellow, green, or black in color, these small, soft-bodied insects feed on the plant sap causing stunted growth and weakening. As with other insect pests, they suck on the plant sap, causing damage to the plant and even allowing the fungal growth and diseases. They stay in these cloud-like fortresses happily sucking on the plant sap. Some fungal attacks are extremely difficult to stop. Aphid infestation can be controlled simply by washing the infested plants or rubbing using a cotton swab dipped in alcohol. Scale insects can be controlled the same way as mealybugs and aphids. To help with diagnosis and eradication, we compiled some of the common pests that can cause damage to your succulents. No one wants to witness their beloved succulents deal with annoying pests or fungal diseases. Controlling cultural conditions with plenty of heat, under stem watering, sterile potting medium, and ventilation will halt many fungal outbreaks. The presence of these mites is not easy to identify and the infestation will only be diagnosed once the plant is exhibiting symptoms that are permanently damaging. Milk – another effective way to get rid of powdery mildew. They can be identified by bite marks around the edges of the succulent leaves and the unmistakable slime trails they leave behind. DIY Fungicides for the Garden Baking Soda. degree in Agriculture specializing in Ornamental Horticulture. These insects are covered with a scale armor that protects it from predators and pesticides. Remove any leaves that have become infected. 2014. Treatments for Fungus Gnats Drying Out Your Soil. Over time, as the fungi mature and spread, the symptoms can broaden and even eat into the cambium as the surface skin cracks and allows the pathogen to enter. They are very stealthy, hiding under the leaves and can only be identified when the plant is disturbed. “Introduction to Succulents and Cacti – Cacti Culture for Newbies”. Keep the area dry as it calluses and watch carefully for signs of reinfection. It's a common problem for … Western flower thrips have a short life cycle which means they can easily damage a whole succulent collection in favorable conditions. (7) Bailey F., Allaway Z. San Marcos Growers. (3) Charles G. “Cacti and Succulents: An illustrated guide to the plants and their cultivation”. P 215. Succulents infested with mealybugs will show symptoms of delayed growth and loss of turgidity or fleshiness. These are small, white, flying insects which are common problems for leafy succulents. Also known as sciarid flies, these pests are a threat to succulents, especially young plants. Repot your plants in a well draining potting mix suitable for cacti and succulents if they are sitting in the wrong medium to prevent moist soil. If the damage isn't severe, a fungicide spray can usually help. Thank you for your support! Greenhouse specimens may be particularly susceptible unless there is adequate ventilation. They are very stealthy, hiding under the leaves and can only be identified when the plant is disturbed. Crassula, Echeveria, and Kalanchoe plants are the most susceptible to these pests. Infested succulents will develop yellow to brown spots, particularly on young growths. Dishwashing Soap. During the growing season, wait until the soil is completely dry before watering. Be sure to read the label and application procedures before using them on your plants. Insecticide treatment has to be done three times in weekly intervals to achieve good control of these pests (3). Leaf Spots. Since the damage done by eriophyid mites is irreversible, the best way to control infestation is to dispose of the infested plant so the mites will not spread to other plants. Infested plants will exhibit galls caused by a chemical injected by these insects. These gastropods are a particular problem for outdoor succulents. Copyright © 2013-2020 World of Succulents. There are organic treatments to get rid of powdery mildews: Potassium bicarbonate – is an effective and safe treatment that kills spores. Once diagnosed, eradication should be done immediately using soil drench treatments or you could just simply squish them (3). Introduced in the UK in the late 1980s, western flower thrip adults are yellow-brown in color with narrow hairy fringed wings, but they are not the main culprit for the damage, their larvae, which are half the size of the adult are. The succulent's leaves shrivel, and the succulent may die. “Success with Succulents: Choosing, Growing, and Caring for Cactuses and Other Succulents” Cool Springs Press. Pest infestation in succulents can become very damaging and eventually kill the plant if not controlled immediately. It appears as a result of feeding by aphids, mealybugs, whiteflies, and scale, as these insects exude a sweet substance called honeydew that the Sooty Mold feeds upon. For the best chances of success, treat your cacti at the first signs infection. 2014. While the adults can cause damage to the leaves, the grubs of vine weevils are the root cause of damage to many succulent collections. Condensation adds to the ambient humidity and promotes spore growth. Although some fungal infections do little damage to cacti, others that are left untreated can lead to the death of the cactus. The succulent's leaves shrivel, and the succulent may die. If you wish to use pesticides, note that spider mites require a specific miticide and will not be easily controlled with most insecticides (1,2). They are difficult to identify unless present in large numbers. If the plant is rife with lesions, it may be best to find some uninfected healthy material and start a new plant with a cutting. But unfortunately succulents do develop issues from time to time and we need to be equipped to get them through the tough times as quickly as possible. Although the diagnosis can be late, once identified, fungus gnats can be controlled with insecticide or larvicide application (7). Infested plants will show symptoms of stunting and failure to thrive. Outdoor cactus can come in contact with fungal spores in various ways. A landscape horticulturist by profession, she has been designing, installing, and maintaining various landscapes and gardens for residential and commercial use. Sooty Mold also called Black Mold, is among the least damaging fungi on succulents. PP 86-87. P. 139 (aloe mite). Lesions on cacti may present in many different ways. This guide will list out some of the most common pests and diseases faced by succulents and cacti as well as how to treat them. You can also cause rot or rupture of cacti cells. A few fungi types damage the roots and eventually, the whole plant, so once their visual damage is seen, it is too late for the plant. As an Amazon Associate we earn from qualifying purchases (at no extra cost to you). It’s also among the least damaging fungi on... Grey Mold. 2019. It’s pretty easy, just… don’t water your plants for a bit. 2017. If you overwater your cactus many times (especially need to be careful in cold weather and winter), it will start rotting.
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