Learn how to identify and control cactus moths so you can defend your house or place of business.
What Orkin Does
Techniques for controlling cactus moths include removing infected host cacti or releasing sterile insects. Host plant removal calls for sanitizing and removing all Opuntia plants from a location, and it should only be employed under specific conditions. As scientists are unable to generate enough sterile insects to control a big population, the use of sterile moths has only been demonstrated to be a successful management approach for small populations.
Every home or structure is different, so your Orkin Pro will create a customized moth treatment plan just for you.
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!
A cactus moth consumes what?
Cactoblastis cactorum (Berg), a pest that is native to South America and feeds on prickly pear cacti (Opuntia spp.), has been employed successfully over the world as a biological control agent against exotic Opuntia cacti, including many Caribbean islands, Hawaii, and Australia. The rich flora and biodiversity of the native desert ecosystems in North America were seriously threatened by the moth’s inadvertent introduction to the Florida Keys in 1989, according to scientists and conservationists. In these dry regions, opuntia cacti are essential because they reduce soil erosion and offer a diverse range of vertebrate and invertebrate species with food, water, shade, and shelter. The parasitic wasp Apanteles opuntiarum Martinez & Bertha has been discovered by researchers as a promising option for distribution as a biological control agent to manage the Argentine cactus moth in the United States.
What is the origin of the cactus moth?
NOTE: It is unknown if this pest spreads in or on firewood. The Gallery of Pests simply features it there for informational purposes.
The Cactoblastiscactorum cactus moth is indigenous to northern Argentina, as well as portions of Peru and Paraguay. In the 1960s, it was introduced to the Caribbean islands to manage a number of (native) prickly pear cactus species (Opuntia) (Simonson 2005).
However, the moth was anticipated to have reached Texas by 2007 in the absence of a USDA-led slow-the-spread campaign (see below) (Enkerlin at Entomological Society Symposium, 2010).
Most species of prickly pear cacti (genus Opuntia) can be killed by the cactus moth, especially those with flat pads. The cactus moth has significantly harmed Florida’s six species of delicate prickly pears, three of which are on the state’s endangered or threatened species list (Garrett, 2004). Small people are more at risk of dying from these attacks, which have affected up to 75% of the prickly pear cacti in some areas (Johnson and Stiling 1998, Baker and Stiling 2009).
There is a wide variety of pollinators supported by these cacti. Numerous wildlife species, such as deer, javelina (peccaries), Texas and desert tortoises, and spiny iguanas, rely on them for a consistent and nutrient-rich food source. Packrats, which are devoured by raptors, coyotes, and snakes, as well as breeding birds like the cactus wren and curve-billed thrasher, find shelter under prickly pears. The cacti serve as nursing plants for the seedlings of other desert plants. The highly erodible soils are kept in place by the root systems of the prickly pears (Simonson 2005).
Mexico will be most affected economically by the loss of prickly pear cacti because prickly pears are a source of food for both people and cattle there. Both the tunas (the fruits) and the pads (the pads) of prickly pears are grown (nopales). In the bush, people also gather fruits and pads.
Natural deep-red dye made from the cochineal beetle (Dactylopius coccus), which feeds on prickly pear cacti, is another linked economic crop. Production of cochineal dye is a prominent agricultural crop in Mexico (Simonson 2005). Some people believe that using the color in foods and cosmetics is preferable because it is a natural substance (http://www.botgard.ucla.edu/html/botanytextbooks/economicbotany/Cochineal/index.html).
Potential economic losses in the US would be less. Losses could include decreased income from authorized hunting opportunities, depending on what species, if any, move into regions where prickly pear cactus were previously common. In South Texas, ranch land leased for hunting is paid a greater fee than ranch land leased for cow production (Garrett 2004). The widespread demise of prickly pear cacti would likely also have a negative impact on ecotourism in the Southwest.
The program was a joint U.S.-Mexican initiative for a number of years, organized by a SAGARPA/USDA agreement and carried out by the North American Plant Protection Organization (NAPPO). Through this system, Mexico even sent money and staff to help the United States monitor and control moth populations, such as in Louisiana.
Other participants in the study included the Gainesville quarantine laboratory of the Florida Department of Agriculture’s Department of Plant Industry, which houses the facility where cactus moths are raised for various purposes.
studies to enhance the bait utilized in traps, the release of sterile males, and now host specificity testing for biocontrol. A volunteer network run by Mississippi State University was in charge of keeping an eye out for cactus moths on federal, state, and private property along the Gulf Coast.
The USDA program never received enough funding. Never did Congress appropriate money. Over many years, Mexico gave at least $1.4 million. As previously mentioned, the U.S. Geological Survey (Department of Interior), Mississippi State University, and the Florida Department of Agriculture and Consumer Services all contributed to the detection and management of cactus moths.
The program now focuses on biocontrol. Once the cactus moth reaches the arid parts of Texas and the Southwest, where cacti are common, biocontrol is thought to be the only practical control method.
In order to prevent the spread of the cactus moth, APHIS modified its regulations in 2009 to forbid the movement of Opuntia cactus nursery stock from affected states in the Southeast (Federal Register Vol. 74 No. 108 [June 8, 2009], pp. 27071-27076). However, a rule to restrict the importation of prickly pear cacti in 2011 (USDA APHIS 2011) in order to stop further introductions of the moth was never finalized.
Sources
2009; Baker, A. J.; Stiling, P. contrasting the impacts of two species of Florida Opuntia on the foreign cactus-feeding moth Cactoblastis cactorum (Berg) (Lepidoptera: Pyralidae) and the native Melitara prodenialis (Walker) (Lepidoptera: Pyralidae). 11: 619–624 in Biol. Invasions.
L. Garrett (2004). White Paper: Economic Impact from Cactoblastis cactorum Spread in the United States, USDA APHIS PPQ CPHST.