Connect with us

Pests & Disease Control

Pest Control for Indoor and Outdoor Cannabis Plants

Just like garden vegetable crops, cannabis plants have a variety of pest insects that can hinder or destroy an otherwise healthy crop.



Just like garden vegetable crops, cannabis plants have a variety of pest insects that can hinder or destroy an otherwise healthy crop. Although most pest insects can negatively affect both indoor and outdoor cannabis crops, there are some pests that seem to be more prevalent in either an indoor or an outdoor cannabis garden. For example, slugs rarely, if ever, cause issues for indoor cannabis growers. On the other hand, fungus gnats and spider mites, which wreak havoc in indoor gardens, are usually kept somewhat in check by natural predators in an outdoor garden. Whether the cannabis plants are grown indoors or outdoors, gardeners armed with the knowledge to prevent, identify, and treat garden pests will be able to defend their precious plants from the damage inflicted by uninvited pathogenic guests.

General Prevention for Indoor Gardens

A solid initial step toward pest insect prevention is to reduce the possibility of pests entering the garden in the first place. The number one way pest insects enter an indoor garden or greenhouse environment is by the gardener’s carelessness. When acquiring a new cannabis strain or plant, it is a good idea for the gardener to not only inspect it for bugs, but also place it in an area outside of the indoor garden for a few days of “quarantine”. The quarantine process should include a treatment with a general insecticide. After 5-7 days, if it passes inspection, the grower can introduce the new specimen to the indoor garden.

Another way pest insects enter an indoor cannabis garden is by hitching a ride on an unsuspecting gardener. If possible, gardeners should avoid entering the grow room right after doing yard work or visiting a friend’s indoor garden. If not hitching a ride on the gardener, pest insects make their way into the garden via the ventilation system or other small openings. A fine screen or mesh covering the ventilation ports reduces the chance of pest insects entering the growing space.

A thorough inspection of the grow room may reveal some small cracks or holes which should be caulked or sealed. Sometimes even the most seemingly minor repairs can make major differences in pest insect prevention. Another simple measure an indoor cannabis grower can take to prevent unwanted pests is to keep a clean growing environment. Dead leaves, discarded soil, standing water, and previously used planting containers are all places for pest insects to live and breed. A clean growing environment is beneficial in many ways, but especially in terms of pest prevention, so if you keep on top of this hopefully you won’t be having to research how to get rid of grass spiders in your house, or any other insects for that matter.

Pest Insect Identification and Specific Treatments

No matter how clean a gardener keeps his or her indoor garden or how hard they try to eliminate unwanted visitors, chances are, at some point, a pest insect problem will have to be dealt with. Early detection and proper identification are crucial to eliminating the problem quickly. The reason early detection is so important is because most pest insects have relatively fast reproductive rates. The fast reproductive rates teamed with incredibly large birth numbers are the reasons untreated pest insects are capable of taking out an otherwise healthy garden in just a matter of days.

Common Pest Insects for Indoor Cannabis

Spider Mites

Spider mites are one of the most destructive indoor garden pests due to their resilience and extremely fast reproductive rates. The most obvious sign of a spider mite infestation is cannabis leaves that have yellow or white speckling. This speckled look is caused by the mites feeding on the underside of the leaves. Another definite sign of spider mites is their webbing, which looks like a tightly woven spider web. When a spider mite infestation occurs, the cannabis flowers and leaves may be fully encased in webbing. There are many chemical insecticides available that are designed specifically for spider mites. These products are usually referred to as miticides.

Chemical miticides can be very dangerous if not handled properly, so paying close attention to the application directions is a must. For the “conscientious cannabis gardener”, there are organic insecticides that have shown promise in treating mites. Whatever method a grower chooses, he or she must make sure to address the mite eggs. Spider mite eggs are super tough and can withstand most insecticides. Indoor cannabis growers with a mite problem should repeat the treatment program every 2-5 days for at least two weeks. This will catch the new spider mites as they hatch and prevent them from re-establishing.


Thrips are another common indoor garden pest. They can usually be identified by the “track” marks left on the top of the leaves when the larvae are feeding. Adult thrips are winged and generally have a straw-like color. Under magnification, a thrip’s body structure resembles that of a wasp or hornet. The best way to treat thrips is to address all stages of the life cycle. Combining sticky traps for the flying adults, a foliar insecticide for the larvae and adults on the plants, and a soil drench to kill any eggs or larvae in the medium is the best way to simultaneously treat all life cycle stages for thrips. Repeating the treatment every few days for a couple of weeks will only help a grower win the battle against these pest insects.

Fungus Gnats

Fungus gnats are usually identified by swarms of little black bugs that scatter when the soil or medium is watered or disturbed. They appear to resemble fruit flies, but, under magnification, their body structure looks more like a tiny mosquito. Fungus gnats are pesky bugs that seem to keep appearing, even after treatment. Again, the combination of sticky traps, a foliar insecticide, and a soil drench is the best multifaceted approach for a fungus gnat problem. It is also advantageous, if possible, to allow the top three to four inches of soil or medium to dry out. Fungus gnats need moisture for reproduction. Letting the top layer of soil or medium dry out will hinder their ability to reproduce.

Other Indoor Pests

Aphids, mealybugs, whiteflies, leaf-miners, and scales are less common pest insects for the indoor cannabis horticulturist. These soft-bodied insects can be successfully treated with an array of insecticides or beneficial insects. Many cannabis growers find insecticidal soap to be a good cure for these less intrusive soft-bodied bugs.

Integrated Pest Management for Outdoor Cannabis Gardens

Although some of the same pest insects that affect indoor gardens also affect outdoor cannabis gardens, preventing and treating pest insects in an outdoor environment can differ greatly from treatment programs in an indoor garden. It is nearly impossible to use a screen or filter to stop flying insects from reaching the plants in an outdoor garden. Therefore, outdoor cannabis growers must turn to other methods of pest insect prevention, such as reaching out to a pest control specialist like those over at trugreen new york. For most outdoor cannabis growers, the best way to approach pest insects is to implement an integrated pest management program. Integrated pest management, or IPM, is the practice of focusing on the long-term prevention of pests and/or pest damage by managing the ecosystem. The idea behind IPM is a comprehensive approach to dealing with pests over the long-term. All in all, IPM is the holistic approach to pest control. The principle of IPM is to look at all of the contributing factors and all of the possible remedies and then make a decision of when and how to take action.

Combination of Treatments

IPM programs normally implement a combination of treatments or control practices that prevent or treat a problem from many different angles. The control practices used in an IPM program can be categorized as biological, physical, cultural, or chemical.

Biological – Biological control is the use of beneficial plants, insects, or microorganisms to control pest insects and pest insect damage. Most pest insects have a natural predator. Ladybugs and beneficial nematodes are just two examples of biological controls.

Physical – Physical control refers to a control that kills the pest insects directly or physically stops them from entering the garden space. Sticky traps to catch flying pest insects and barriers to keep rodents or deer out of the garden are examples of physical controls.

Cultural – Cultural controls are practices that reduce the pest insect’s ability to establish itself. For example, a change in irrigation practices can reduce moisture at certain times throughout the day, thus reducing particular pests.

Chemical – Chemical control is the use of pesticides. For most IPM programs, chemical control is only used when needed and is used in conjunction with other techniques to maximize effectiveness and to create long-term solutions.

Identify the Problem

Even with an IPM program implemented, it is still possible for an outdoor cannabis garden to contract a pest insect problem. Positive identification of the pest will allow a grower to find a combination of treatments specifically designed for that pest. For example, an outdoor grower who discovers aphids may want to plant fennel (known to repel aphids) and release ladybugs. This would be the biological approach. The gardener could also spray the plant with water to “wash off” some of the aphids. This would be the physical approach. If these tactics fail, it may be time to use a chemical control (pesticides).

As long as humans continue to cultivate plants for food and medicine they will have to prepare for potential pest insect problems. As with many problematic issues in a cannabis garden, prevention is key. In both indoor and outdoor cannabis gardens, growers can take steps to reduce the likelihood of acquiring a pest insect problem. Growing cannabis indoors gives horticulturists heightened control over environmental factors. Unfortunately, this “closed ecosystem” also creates a perfect environment for pest insects to establish without the danger of natural predators.

Only a grower armed with knowledge can identify and treat pest insects in an indoor garden. Outdoor cannabis growers can team up with Mother Nature and her natural biological controls. By implementing an IPM program, outdoor cannabis growers can manage their ecosystems to best prevent and treat unwanted guests. Whether indoors or outdoors, cannabis growers who encounter pest insects need to act quickly to positively identify and treat the pest insect before surmountable damage occurs.

By: Eric Hopper

Continue Reading


  1. Tomxag

    September 25, 2020 at 12:20 pm

    urgent problems

    take advantage of this questions to assist you to determine whether you would like to see a mind health professional suitable for a diagnosis combined with cure for autism spectrum problem, A subconscious medical care matter to that concerns incapacity in social connections with other sites.

    support: this can be an checking find out to aid decide if maybe you have an autism range attack (like something had been described Asperger complaint). i highly recommend you take the time to make out the what follows style as efficiently, legitimately in addition,yet completely as they can. your whole collection of answers are generally secret and you will find .

    most people when using autism range syndrome display screens blunders regarding both verbal but also nontalking. They also often have a problem in doing with other sites mentally, turning eye contact, aka comprehending the subtleties ture of cooperation chatting between the two two many people. they generally obtain conditions empathizing with other people on top of that relating the thinking properly sensations.

    pain along with complaint likewise incorporate out of place manners, characterized by similar or constrained warning signs. all of these may be denoted caused by strict strategies, exceptionally very specific passion as well as spare-time activities, as well as,while an exaggerated reviews awareness from toys in his or her earth (for instance,akin to loud noises or dazzling, blinking things).

    some sort of weakest model of autism spectrum problems formerly were described as Asperger malady.

    here is additional information: Autism range problems characteristics

    learn more: Autism variety challenges thoroughly

    treatments for Autism

    removing the autism is different dependant upon whether the person is any or perhaps even child. grown treatment of autism is aimed at type of forms psychotherapy. Autism treat in children would have a number of, contributory strategic methods which usually work towards letting the newborn discover to assist in strengthening the company’s dialect, Social, as well as,while cognitive achievements, while it’s true spotlighting incredibly good affairs.

  2. Babeszbs

    September 23, 2020 at 2:06 am

    the way Vietnamese kids deal with Viet Kieu during wedding

    The highest time they can make contact with Vietnam could be described as on the beginner Year event back in jan. any of them go to venture to all their household members while some go that there so as to get engaged to be married. this company see each other along with the integrating off their partners or alternatively kinfolk. these kind young families also get acquainted with the other person by using Vietnamese paid dating sites. in this post i will bookmark deal with how Vietnamese young females or Viet Kieu speak with one another the internet.

    thinking about buying have a passion for and loving via the web has developed into event for Vietnamese men and women. effective dating sites launched thousands at young couples a year. Viet Kieu topics distinct own personal classifieds within the net locate Vietnamese women. numerous have your computer on your own, so that the number for an account and as well as try to look for girls are too less costly. they may beautiful vietnamese women try this when they want. Vietnamese womens similarly site his or her lives single profiles on the internet and look for Viet Kieu individual life far away. If a lady has broaden where you live, she will create a account a profile then locate Viet Kieu completely from home. though my girl is not required a pc, so therefore she must see on the web fitness center for this. your sweetheart feel the need to compensation a small fee for the benefit the internet.

    Viet Kieu does write specific fliers of french, as they are practical only at that tongue. Vietnamese housewives information their single members in their own personal appropriate language because they don’t talk or to pen speech with complete confidence. a certain amount of gals in Vietnam draft his or advertisements in french if selecting to just open find north west to single ladies. postings in speech get visited greater for the dialect Vietnamese. considering that the Vietnam most wives are far too desired in today’s world, a great deal american grownup males looking to hire Vietnamese wives. Thousand as wells of Viet Kieu teens Vietnamese committed together every single year. This has developed into means presently. hence, western a man search online for Vietnamese womans for married at these online online dating services.

    the biggest reason that a Viet Kieu go back to Vietnam and request hitched is because he fancies a little daughter lady. a little bit of Vietnamese women of all ages marry men who definitely are much older than consumers, particularly 20 or a 30 decades. i. e,nonetheless, a girl wearing Vietnam could get engaged to be married having 60 years Vietnamese man. you’ll the fermentation improvement of these your marriage. why do the females demand experienced all something like this? may possibly one primary level that a fresh Vietnamese woman requests after her aged people husband’s comments, This is to be able to make money in western side areas. this means, as your woman gets nearer a traditional western territory, she’s got most the opportunity to work to make money. throughout reality, she will have a much better probable on the inside traditional western usa.

You must be logged in to post a comment Login

Leave a Reply

Must Reads