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Flower Balconies & Pest Control

Flower balconies, often vibrant and compact garden spaces in urban or residential settings, can quickly become hotspots for common pests like aphids, whiteflies, thrips, and fungus gnats. Because these areas are close to living spaces and frequently visited by pollinators, traditional chemical sprays are often undesirable. Biological pest control offers a safe and effective alternative, using natural enemies such as predatory mites, beneficial nematodes, and predatory insects to target pests without harming plants, people, or beneficial insects. Many biocontrol products are easy to apply—such as preventative sachets—making them ideal for home gardeners. This approach not only keeps plants healthy and blooming but also supports a more sustainable and pollinator-friendly balcony ecosystem.

Monitoring & Mass Trapping

Monitoring and mass trapping are important tools for managing pests on flower balconies, but they must be used thoughtfully to protect beneficial insects. Horiver sticky cards and roller tape can be helpful for detecting early signs of pests like whiteflies or thrips, but they should only be used if the balcony is enclosed or netted. When placed in open, outdoor spaces, these sticky traps can unintentionally capture pollinators like bees and butterflies, as well as native beneficial insects that help keep pest populations in check. For open balconies, it's better to rely on regular visual inspections and use targeted pheromone traps for specific pests when needed. This approach allows for effective monitoring and population control while preserving the health and diversity of the surrounding insect community.

Spider Mite Control Products

Spider Mite Control Products Preventative Elimination Repeat Applications Notes

One sachet per plant

n/a

Every 3-4 weeks

Feeds on all stages of spider mites, but does not do well in webbing. 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.



n/a

One sachet per plant

 

 

OR

 

100-150 predatory mites per meter square

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 the floor.

 


Thrips Control Products

Thrips Control Products Preventative Elimination Repeat Applications Notes

One sachet per plant

One sachet per plant combined with Thripor or Horiver

Every 4-5 weeks

Feeds on 1st instar thrips larvae. The sachets last 4-5 weeks once applied on the plants.


n/a

40 insects per sq. meter

Bi-weekly or as needed

Feeds on all stages of thrips, except eggs and pupae. Best used with diboxes for a cleaner distribution method.

One card per square meter

Two cards per square meter

Replace cards when full

Only use when if the balcony is netted or closed in.

 

Blue or Yellow: common thrips species

Green: Echinothrips

1 tablespoon per pot

n/a

Repeat every 6-8 weeks or when an influx of thrips is found on the plants

Only use with common thrips species, as this product only feeds on thrips pupae and the Echinothrips do not pupate in the soil.

 

To be used as a supplementary control in combination with Swirski Ulti-mite. Will not adequately control thrips as a stand alone product.

 

An Entomite 10,000 will treat 60 pots at one tablespoon per pot.


Fungus Gnat Control Products

Fungus Gnat Control Products Preventative Elimination Repeat Applications Notes

1 tablespoon per pot

2-3 tablespoons per pot.

Prevention: re-apply every time you pot up your plants or change out soil.

 

Elimination: Repeat every 6-8 weeks or when there is an influx of fungus gnats flying around the plants

Feeds on fungus gnat eggs and larvae.

 

An Entomite 10,000 will treat 60 pots at one tablespoon per pot.

 

Use in combination with yellow Horiver Wetstick cards.

One card per square meter

Two cards per square meter

Replace cards when full

Only use when if the balcony is netted or closed in. Hang underneath the foliage near the soil line to capture flying adults.

n/a

500,000 per meter square

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

Weekly or bi-weekly as needed

Aphids are extremely difficult to eradicate using biologicals only. Best used with diboxes for a cleaner distributions method.


Scale/Mealybug Control Products

Scale/Mealybug Control Products Preventative Elimination Repeat Applications Notes

n/a

40 insects per square meter

Weekly or bi-weekly as needed

Product mimics the look of mealybugs. It can be hard to distinguish between the two. Best used with diboxes for a cleaner distribution method.


Whitefly Control Products

Whitefly Product Controls Preventative Curative Repeat Applications Notes

1 sachet per plant

1 sachet per plant combined with yellow Horiver cards

Apply every 4-5 weeks.

Feeds on eggs and larvae of whitefly. The sachets last 4-5 weeks on the plants.

One card per square meter

Two cards per square meter

Replace cards when full

For best results place cards approx. 18" (46cm) above canopy. Only use when if the balcony is netted or closed in.


Caterpillar Control Products

Caterpillar Control Products Preventative Elimination Repeat Applications Notes

n/a

500,000 per square meter

Weekly or bi-weekly as needed

Ony apply once you see the caterpillars on the leaves.

Flower Balconies Solutions by Pests:

Aphids

Fungus gnats
(Sciarid flies)

Shore flies

Leaf miners

Brown soft scale

Citrus mealybug

Long-tailed
mealybug

False
spider mites

Two spotted spider mite

Broad mite

Impatiens thrips

Western flower
thrips

Onion thrips

Tobacco
whitefly

Greenhouse
whitefly

Flower Balcony Articles:




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