Cannabis & Pest Control

Troublesome pests such as spider mites, aphids, and thrips are posing challenges across various cannabis cultivation spaces, as the legalization of cannabis in Canada has resulted in a rise in pest transmission between facilities and home growers. Moreover, the majority of conventional pesticides are prohibited for use in this crop, making eco-friendly alternative choices like biological pest control methods essential.

In the provided tables, you'll find our recommended products for each pest, accompanied by prevention and elimination rates. Prevention involves safeguarding the crop from pest damage, while elimination focuses on removing pests from the crop.

Protocol:

Monitoring

To effectively monitor and control pests in cannabis grow rooms, use a minimum of 4 Yellow Horiver Wetstick cards per grow room. Place approximately one card per 20-40 square meters or one card per 20-40 lights. These sticky cards are essential for detecting and monitoring thrips, whiteflies, aphids, and sciarid flies. Count and assess the cards weekly to identify any increases in pest populations.

Conduct weekly crop inspections by thoroughly examining plants from the soil to the canopy. Check the soil, stems, leaves, and leaf joints for signs of pests. Perform leaf flips to inspect both the upper and lower surfaces of leaves, focusing on new and older growth, as pests can hide on the underside of leaves where they are less likely to be disturbed.

To prevent introducing pests to your main growing area, quarantine new plants in a separate area for at least two weeks before integrating them with your established crops. Inspect all incoming plant material upon arrival. Carefully examine plants for pests or signs of damage, especially when sourcing clones or transplants.

Following these practices ensures a proactive approach to pest control, minimizing the risk of infestations and promoting a healthy, productive cannabis crop.

Spider Mite Control Products

Spider Mite Control Products Preventative Elimination Repeat Applications Notes

One sachet per plant

n/a

Every 4-5 weeks

Feeds on all stages of spider mites, but does not do well in webbing. Not recommended to apply past week 2 of flower, as the sachets last 4-5 weeks on the plants.

One sachet per plant

n/a

Bi-weekly or as needed

Feeds on all stages of spider mites. Not recommended to apply past week 4 of flower, as the sachets last 1-2 weeks on the plants.



n/a

One sachet per sq. meter (approx. one light).

 

 

OR

 

100-150 predatory mites per meter square (approx one light) in diboxes.

Bi-weekly or as needed

Both products feed on all stages of spider mites.

 

Use Spidex Boost OR Spidex Red & Diboxes

to avoid getting carrier material on plants during flower.

 

Ensure all introductions are completed at least 2 weeks before harvest.


Thrips Control Products

Thrips Control Products Preventative Elimination Repeat Applications Notes

One sachet per plant

One sachet per plant combined with Thripor or Horiver Wetstick cards

Every 4-5 weeks

Feeds on 1st instar thrips larvae. Not recommended to apply past week 2 of flower, as the sachets last 4-5 weeks once applied on the plants.

n/a

40 insects per sq. meter (approx. one light)

Bi-weekly or as needed

Feeds on all stages of thrips, except eggs and pupae. Ensure all introductions are completed at least 4 weeks before harvest.

One card per square meter (approx. one light)

Two cards per square meter (approx. one light)

Replace cards when full

For best results place cards approx. 18" (46cm) above canopy.

300 mites per square meter (approx. one light)

n/a

Once per crop cycle

Only to be used as a supplementary control in combination with Swirski Ulti-mite. Will not adequately control thrips as a stand alone product, as it only feeds on thrips pupae in the soil.


Fungus Gnat Control Products

Fungus Gnat Control Products Preventative Elimination Repeat Applications Notes

300 mites per square meter (approx. 1 light)

400 mites per square meter (approx 1. light) in combination with Horiver Wetstick cards hung under canopy

Preventative: once per crop cycle

 

Elimination: every six weeks on mothers and reapply each transplant stage

Feeds on fungus gnat eggs and larvae.

n/a

Two cards per square meter (approx 1 light)

Replace cards when full

Hang underneath the canopy near the soil line to capture flying adults.

n/a

500,000 per meter square (approx. 1 light)

Re-apply weekly for 3-4 weeks

For fast results, use in conjunction with Entomite. Works on fungus gnat larvae.


Aphid Control Products

Aphid Control Products Preventative Elimination Repeat Applications Notes

n/a

50 insects per square meter (approx. 1 light)

Weekly or bi-weekly as needed

Aphids are extremely difficult to eradicate using biologicals only. Ensure all introductions are completed at least 4 weeks before harvest. Once the crop cycle is completed do a heat treatment in your rooms at 45C for a minimum of 5hrs.

n/a

10-20 wasps per square meter (approx. 1 light)

Weekly or bi-weekly as needed

Aphids are extremely difficult to eradicate using biologicals only. Ensure all introductions are completed at least 4 weeks before harvest. Once the crop cycle is completed do a heat treatment in your rooms at 45C for a minimum of 5hrs.


Scale/Mealybug Control Products

Scale/Mealybug Control Products Preventative Elimination Repeat Applications Notes

n/a

40 insects per square meter (approx. 1 light)

Weekly or bi-weekly as needed

Product mimics the look of mealybugs. It can be hard to distinguish between the two. Ensure all introductions are completed at least 4 weeks before harvest.


Growth Promotion & Root Disease Products

Growth Promotion & Root Disease Products Preventative Elimination Repeat Applications Notes

Start treatment with two applications 14 days apart

Apply every 14 days during periods of unfavourable conditions

Every 14-28 days, depending on crop conditions

Microflora PRO enhances plant growth by improving the availability of plant nutrients through the root system.

Trianum-P competes for space and nutrients on roots, reducing pathogen establishment. Must have a pesticide license to purchase.

Cannabis Solutions by pests:

Cannabis aphid

Rice root aphid

Fungus gnats
(Sciarid flies)

Shore flies

Leaf miners

Brown soft scale

Citrus mealybug

Long-tailed
mealybug

Hemp russet mite

Broad mite

Spider mite

Greenhouse Whitefly

Western flower
thrips

Onion thrips

Tobacco whitefly

Effective Bio-Control Tips for Cannabis:

Predatory Mites: If plants are touching, predatory mites can easily move between them. When plants are not touching, apply the sachets or bottles evenly to each individual plant for effective coverage.

Flying Predators: These predators will naturally disperse to locate prey. However, introducing them at multiple points throughout the growing area improves pest control efficiency.

Product Application: Whenever possible, use Ulti-Mite sachets to prevent carrier material from mixing with flowers. If this cannot occur, for flowering crops, place loose product into DiBoxes to keep the carrier material separate from the final product.

Cannabis Articles:




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