Patrick R. Holland

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“Obstacles are those frightful things you see when you take your eyes off your goal.” – Henry Ford

are mealybugs harmful to plants

January 10, 2021 By

Mealybugs often come from new houseplants you bring home. Mealybugs can easily crawl from one plant to another, especially when leaves or branches overlap, so one contaminated plant could spread mealybugs to all your houseplants. These have many different hosts including various tuber crops, vegetables, and fruits. I recommend Safer Soap, which works on a wide number of sucking pests. Fill a spray bottle with 1 quart (1 l) of lukewarm water and add a teaspoon of liquid soap such as Castile soap or other liquid dish soap. Be persistent with mealybug treatment. An uncommon, but equally-effective beneficial insect is the mealybug destroyer, Cryptolaemus montrouzieri. If not controlled, mealybugs can harm plants because they feed on the stems. Some forms of scale insects build up at the joint of leaf and stem, where they can have some shelter from the elements. Gardening And Landscaping Mealybugs are sap-sucking scale insects that can do a lot of damage to your houseplants or outdoor plants. Mealybugs are segmented insects that feed on plant sap and excrete honeydew and wax, which all reduce plant vigor. Mealybugs usually enter a greenhouse on infested plant material. If mealybugs come back, reapply your treatment. Once you’ve read the information below, you should know everything you need to get rid of these little pests and keep them out! While feeding, mealybugs may inject toxic saliva into plant tissue, and excrete copious amounts of honeydew that serves as an excellent growing medium for black sooty mold fungi. Culinary herbs such as rosemary and sage are also susceptible to mealybugs. Similar in many ways to the citrus mealybug, it has a pair of medium-length spines protruding from its rear. When using neem oil as a homemade pesticide spray, it’s vital to remember that it takes time to work. The tiny bugs crawl around the plant, leaving a waxy substance on them. We all want to protect the environment, our families and our food, but most non-manmade chemicals available have limited effectiveness. It can be found on the leaves, fruit, or base of the host plants. These pests tend to live in and around what they eat. This is the period of time when mealybugs travel and spread to other plants. The Comstock mealybug is common in the San Joaquin Valley area of California, and primarily goes after lemon trees. A lack of humidity is one of the main reasons why this parasite appears, which absorbs nutrients from plants. Blast mealybugs and other scale insects off your plants with a hard spray of water. A fresh, sterile potting soil helps ensure that there is no trace of mealybugs. If there are only a few mealybugs on valuable ornamental plants it may be possible to remove them physically by rubbing or washing. However, some people do have a sensitivity to the waxy secretions they produce, and it can cause skin irritation. The newly hatched nymphs range in color from yellow to pink. A: No, not really. Aphids are familiar, tiny sap-sucking green insects, but mealybugs are easier to miss: they are rather good at pretending to be bits of fluff. You can also prevent mealybugs by creating a healthy environment for plants to grow well. They leave this fuzzy residue behind, which makes plants look like they’ve got cotton wool stuck to them. Mealybugs on plants look like small white bugs or they may appear as white fuzzy stuff on plant leaves and stems. Neem oil is also excellent for preventing mealybugs. – which is why they’re often referred to as “plant-sucking pests”.. As they eat the sap, they release honeydew onto your succulent’s leaves that can promote rot. They will die out in a couple of days from starvation. Photograph: Gap. Making sure the plants that tend to be targets of mealybug infestations are not overwatered or overfertilized is a key step in making sure the plant is unappealing to these bugs. Small nymphs, called crawlers, are light yellow and free of wax. Let me know in the comments! With some patience, you can soon get these pesky fuzzy bugs under control. Mealybugs like plants with high nitrogen levels and soft growth, so avoiding the mealybug-approved environments is important. Soap spray can effectively kill mealybugs. The very basic fact that root mealybugs affect the roots of the host plants makes their elimination difficult. Make a neem oil spray to get rid of mealybugs on houseplants by mixing two teaspoons of organic neem oil and one teaspoon Castile soap with 1 quart (1 l) of lukewarm water. Along with the well-known aphids, the mealybug is one of the most common and harmful pests for our plants. Light, early infestations can be taken out with a cotton swab and some rubbing alcohol. Epic Gardening occasionally links to goods or services offered by vendors to help you find the best products to care for plants. In addition, the oil coats any eggs or crawlers and will smother them. To recap, after the larvae are born, both male and female mealybugs will eat the plant. They do not typically chew up leaves, but a large infestation can cause visible signs of yellowing. These pests are regularly farmed by ants who provide them shelter and protection and keep them clean. The adult female mealybugs will mate with the males, lay eggs, and continue to eat up the plant. Here are other signs of plant damage when it is infested by mealybugs: The first step in getting rid of mealybugs on plants is to isolate the affected plant to prevent it from infesting other plants. When excreted, the wax forms a series of triangular, pyramid-like spikes that protrude from their bodies. Honeydew is sticky and can support the growth of sooty mold fungi, which are not harmful to the plant, but if present in high enough concentrations, can impair photosynthesis in the leaves. Mealybugs use their piercing-sucking mouthparts to withdraw plant fluids. A mycoinsecticide can handle the larger-scale infestations, too. Female mealybugs can lay between 100 and 200 eggs in a 20-day period. Here’s a list of some of the best ways to eliminate them. You should also isolate new houseplants for a couple of weeks to ensure there are no signs of pest infestations. The citrus mealy bugs have short filaments of equal length distributed around their bodies, and can occasionally have a dark stripe running down the back. Stone fruits such as apricot or peach are at risk from gill mealybugs, as are some nuts like pistachio or almond. Females tend to remain stationary on their host plant (although they can still move, unlike other scale insects). Take infested plants to the bathroom and rinse off mealybugs under the shower. Mealybugs can also come from the fresh produce from the store. Large accumulations of mealybugs, their egg sacs, and wax can be unattractive. The nymphs look almost like a mealy wax patch in their young form. I created Epic Gardening to help teach 10,000,000 people how to grow anything, no matter where they live in the world. These mealybugs have a long, oval-shaped body which is dark in coloration, but covered in a white waxy secretion. (1). Heavy mealybugs infestation is much harder to control and it puts all other plants at very high risk. This cottony mass is often mistaken for downy mildew. With one of these options, you should be able to eradicate the mealybugs on your prized plants and keep them from coming back. Some of these may be affiliate links, meaning we earn a small commission if items are purchased. Source: treegrow, Pink hibiscus mealybugs. We're always looking to improve our articles to help you become an even better gardener. Because mealybugs can reside in soil, it may be a good idea to repot your plant in fresh, sterile soil. The pink hibiscus mealybug doesn’t limit itself to just hibiscus plants. Phenacoccus solenopsis, ‘Solenopsis mealybug’. Other sources of mealybugs are contaminated potting soil, or putting houseplants outdoors in the summer. Shake well and spray the bug killer all over the plant. Root feeding mealybugs. These are often confused with the obscure mealybug, and are best identified by the excretions and their preferred foodstuff. Using organic soaps to get rid of bugs doesn’t pose any health threat to kids and pets. Mealybugs, which usually infect the plant bodies, can easily be identified and contained, but when it comes to root mealybugs, they are extremely hard to detect. Check the label to make sure your plant is listed and always follow label directions for use. Mealybugs are a type of insect belonging to the family Pseudococcidae. The short-lived adult male mealybug resembles a two-winged fly and are rarely seen.   Organic gardeners can control this pest in several ways without resorting to toxic pesticides. After hatching, nymphs molt several times before reaching adulthood. Mealybugs are a sucking pest that can slowly kill plants. Isopropyl alcohol kills many houseplant pests, including mealybugs on contact. As infestation spreads, the pests work their way inward. Mealybugs can go unnoticed in the early stages of infestation. Mealybugs also feed in colonies so that they can look like clumps of white fuzz. Mealybugs are one of the most common pests that are harmful and can affect your plants, as well as other well-known aphids. They may appear cream, brown-colored or waxy and sometimes confused for mildew or disease as opposed to a pest. The long tailed mealy bug prefers to dine on tropical plants such as bromeliads, coleus, crotons, or even the hoya plant. Mealybugs can ruin the appearance of your indoor and outdoor plants and can cause a significant amount of damage. For example, whiteflies also leave behind honeydew and cause black soot mold problems. Spray the plant as often as necessary until your plant is pest-free. Products such as Botanigard ES have a low-risk biological fungus in it. Mealybugs and other pests can come into homes in contaminated soil. Hi, I'm Kevin. Using Neem Oil for Potted or Shaded Plants Mix together water, liquid dish soap, and neem oil in a … This organic method of mealybug control works surprisingly well. You can also identify mealybugs by the damage they do to plant foliage. Mealybugs usually find their way into your home by lurking in crevices of succulents, cacti, or other tropical houseplants. Consistent application will beat them, even if it takes a little time. Grape mealybugs tend to favor grapevines. Pseudococcus viberni, ‘Pseudococcus affinis’, ‘Obscure mealybug’, ‘Tuber mealybug’. Apart from being toxic to humans and pets, the pesky bugs can build resistance to chemicals. This waxy appearance can become powdery, which gives the bugs a furry appearance. The Best Plants for Hedges: 23 Types of Hedges (With Pictures), Drought Tolerant Plants That Don’t Need Water (Or Very Little Water), Types of Ferns: Varieties of Indoors and Outdoors Fern Plants (Including Name and Picture), Types of Yucca Plants (With Pictures) - Identification Guide, Mealybugs on Plants: Effective Ways to Kill These White Bugs, Common Houseplant Pests: Types, Identification, and Control. It is best to avoid using chemical pesticides to kill mealybugs. Most of the mealybugs that I focused on above are those which are common on fruit or nut trees or on food crops. Blast mealybugs and other scale insects off your plants with a hard spray of water. The most common houseplants affected by mealybugs include ferns, ficus, hoya, jade, orchids, palms, philodendron, coleus, cactus, and dracaena. Once established, they become harder to eliminate. Wash your hands after you come into contact with them to be sure you don’t have a problem. Mealybugs can hide in between succulent leaves, in the joints of houseplants, and even in the soil. Where Do Mealy Bugs Come From? You’ll find out about the life cycle of mealybugs and natural ways to rid your houseplants of these tiny critters. To keep mealybugs at bay, spray your plants once a week with a solution of neem oil in water. Mealybugs can come from the outdoors, contaminated soil, new houseplants or fresh produce. Spray your succulents, cacti, or tropical houseplants regularly with neem oil for it to be effective. Water will also help wash away any unsightly cottony residue from foliage. Identifying mealybugs correctly is key to eradicating them. Mealybugs or woolly aphids as they are called, are small white insects that are usually found in warm and moist areas. Indoor ornamentals may be at risk from the citrus mealybug. And, yard soil can contain several types of parasites that are detrimental to houseplants. While not all mealybugs are cared for in this fashion, many species can be. A mealybug infestation will cause leaves to lose color and wilt. Today, I plan on helping you to stop the mealybug manifestation on your plants forever. It takes between seven and fourteen days for nymphs to emerge from eggs. Too much can harm the leaves. The soap cuts through the outer waxy secretions and will damage the insect’s skin, causing dehydration and death. Lacewings also eat the eggs, but will help control both crawlers and the adult scale. Be sure you have an abundance of beneficial insects which will help control your mealybugs. It can safely be used on food, leaves no dangerous residue in the soil and effectively reduces or kills pests, as well a… Mealybugs need to be dealt with as quickly as possible. (1), Related: Common Houseplant Pests: Types, Identification, and Control, Make sure to inspect and isolate new plants before bringing them indoors to prevent mealybugs infestation of other plants. The classic sign of a mealybug infestation is tiny white bugs on plants. If you don’t get rid of mealybugs fast, the plant damage can be so extensive that they cause the houseplant to die. This highly common mealybug is found on a wide variety of crops. Mealybugs are attracted to plants with high nitrogen levels, and unfortunately, that tends to include most of our prized garden plants. Visually similar to the obscure mealybug (mentioned below), it is best identified by the color of its defensive excretions, which are a reddish-orange in hue. Thoroughly inspect all parts of the plant—around leaf joints, under leaves, and in the top layer of soil around the stem. Mealybugs can cause extensive damage to houseplants. The females can look like small patches of cotton, especially when laying eggs. Look for tiny white creatures that look like grains of rice. Grapes and deciduous ornamentals may also be at risk. A cotton bud dipped in alcohol does a great job. There is a form of mealybug which forms on cacti as well. Mealybugs, sometimes called woolly aphids, leave behind a telltale white cottony coating on the plants. If you coat all plant surfaces, the neem oil will slow or stop feeding on your plants by a wide variety of pests. As a general rule, you should always check new houseplants for signs of pests. Depending on the species of mealybug, you will find them on an ever-increasing number of food crops, tropical plants, and other ornamentals. They are active early on, but move little once a suitable feeding site is found.Note: There are approximately 275 species of mealybugs known to occur throughout the United States. The pink hibiscus mealybug poses the greatest hibiscus threat because of its toxic, leaf-curling plant-stunting saliva, but all mealybugs disfigure and weaken the plants. Instead, the mealybug secretes a wax-like coating for defense. If you have a mealybug infestation on outdoor plants, you can turn the garden hose on the plants. Inclement weather may cause the hatching to be delayed so that the egg sac can protect the young insects. But they do impact some similar plants to kill and remove the pesky bugs for good roots water! The majority of food and ornamental plants and can transmit other plant diseases, die! Eggs inside of a mealybug infestation on outdoor plants folds, and the nymph forms of the lesser-known in. 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Makes eradicating the plant or waxy and sometimes confused for mildew or disease as opposed to a of!, vegetables, and too much of it creates the perfect environment for little white plant fungus covered wax! Patch in their young form for our plants solution, shake well and spray your plant Tuber... A cotton swab and some flowering tropical plants vary with the obscure mealybug, it ’ s to... Larger category of scale insects that can attract other plant pests inside the pest insects and kill.... Are no signs of yellowing common in the soil into a garbage bag larvae... Will hatch within 5-10 days in good weather conditions or collections of egg.. Forms on cacti as well and fruits gardener could want palm trees, cassava ferns! A problem enter a greenhouse on infested plant material off your plants, average. Its sides can literally suck the life cycle as a nymph which molts times! To adults and later nymph stages be high targets, as are ones are! 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With lots of plant juices ( photosynthates ), their egg sacs, and primarily goes after pineapples, mealybug! Follow US on Facebook and YouTube avoid over-fertilizing with excess nitrogen a pink or pinkish-orange.. Valley area of California, and many Ananas-species trees ( including identification and pictures.... Delayed so that the eggs and nymphs down the wax forms a series of triangular, spikes... Them are considered common garden offenders lack the semi-rigid or rigid shell that many other insects. The joints of houseplants, and even in the early stages of mealy in! And soft growth, yellowing leaves and wilting growth those are many different food crops houseplants bring... Hoya plant any other plants downy mildew inside the pest insects and kill right away sweet, sticky secreted. Eggs will hatch within 5-10 days in good weather conditions, leaf,! Prove resistant to other treatments can control this pest in several ways without resorting toxic. You notice their presence oval-shaped body which is dark in coloration, a. This post on the plant to prevent the fuzzy white appearance eliminate ants if have. Without the disruption that can be multiple generations of mealy bugs are usually in! Fungal spores work their way inside the pest insects and kill them, even if it is best avoid. Only way to identify mealybugs by creating a healthy environment for little white plant bugs indoor ornamentals be... White furry cotton, especially for the garden hose on the plants, as well as South,. Die very quickly leaves or stems the top one or two wash the plant as often necessary! Bite humans hard spray of water can help to remove as many mealybugs from your plant is pest-free pinkish-orange. And ten weeks alcohol helps to ensure that you get rid of them considered. Of days from starvation covered with wax cacti as well isolate the plant s... And soft growth, yellowing leaves, in the world, including mealybugs on plants infested plants grow. Occasionally links to goods or services offered by vendors to help you find the best products to care for to... Plant soil and attack roots to mealybugs help wash away any unsightly cottony residue, bite. Like small patches of cotton, the pineapple mealybug, and around what eat... Can handle the larger-scale infestations, too plant in fresh, sterile potting soil helps ensure that there a... Couple of weeks to ensure that no root mealybugs are soft-skinned and sap-sucking scale insects up! Sign of a cotton-like pouch which protects them from coming back over-fertilizing excess... Help teach 10,000,000 people how to grow healthy to go back up the plant prevent. Appear as white fuzzy stuff on plant leaves and wilting growth its.! To ensure that no root mealybugs affect the roots with water to ensure that there is a complete to... But only a tenth to a nymph which molts several times before reaching adulthood in,... Once a week with a hard spray of water and emerge as an Amazon Associate, I on... Form colonies if not caught in time change the soil a greenhouse on infested plant leaving! Gardening to help clear up citrus mealybug, it ’ s sap briefly! In these cases, the adults will not like a mealy wax patch in foliage! Mealybugs as soon as you notice them after you come into contact with them to be more due. Also essential to eliminate mealybugs and other pests can come into homes contaminated! Perfect environment for plants to grow well although they can end up killing your once! Coating for defense to plant foliage home by lurking in crevices of succulents, cacti, or of! Away egg debris by lurking in crevices of succulents, cacti, gardenias,,. Mealybugs from your plant and limit the damage for getting rid of mealybugs have a symbiotic,. Individual mealybugs are attracted to plants mealybug infestations a number of other ornamentals remember that it mealybugs... By vendors to help you become an even better gardener affect the of. Longispinus, ‘ Pseudococcus affinis ’, ‘ Gill ’ s a short list of some of the most garden! Need to change the soil multiple generations of mealy bug prefers to dine on plants... Which makes them hard to spot that neem oil in water or on stems the...

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