Amblyseius andersoni

Amblyseius andersoni

from 130.00

*** This product needs to be ordered by 10am Thursdays for the following week’s delivery***

Target Pest 
This predatory mite feeds on broad, cyclamen, russet mites and two-spotted spider mites.  They will also feed on pollen and thrips larvae allowing the population to survive when pest mite populations decrease.  Andersoni is active and effective across a variety of temperatures and humidities. This flexibility makes it an easy choice for preventative mite control in your garden.

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Effective use in Commercial Cannabis cultivation:

Rates with Andersoni in Cannabis seem to vary a little from what the traditional registered rates listed below. We say that because the dollar value of the Cannabis crop is so high. Instead of treating in meters and as a row crop, we recommend that each plant have direct attention to them for optimal results. The climate fluctuation, temperature and humidity changes, the rapid plant growth with new plant growth, not to mention the air movements, and hairiness make Cannabis a beast for treatment. 

For Commercial Cannabis Rates please fill out our New Customer Inquiry form for a discrete, personalized Chemical Free Pest Management plan.

Available in 100 Gemini sachets, 200 mini sachets, or in loose material in 1 liter containers, 25,000 predatory mites.

For Best Results:

Please read the FAQ's at the end of this page.

Instructions for Use

Mini sachets:
Hang from crop wire or under plant canopy
Do not hang adjacent to heating pipes

Gemini sachets:
Hang over branches under canopy of plant

Shaker Tube: 
1 liter containing 25,000 mites
Shake small quantities of Amblyseius andersoni onto the crop near base of plant

We have found it to be very effective to spread liter containers into solo cups and hang under canopy of plant with hooks

Traditional Horticulture recommendations:

Amblyseius andersoni is a predatory mite that can be used in the control of a range of mite pests. This predatory mite is ideal for Cannabis, vegetables, hardy ornamentals and fruit crops, controlling red or two-spotted spider mite, fruit-tree red spider mite, and russet mites.

It is active at lower temperatures than other predatory mites, which means that it can be introduced much earlier in the growing season than some other predators. It is available in the Mini sachet with a hook or the water-resistant Gemini sachet that will tolerate irrigation or rain, so can be used in outdoor crops and over-head irrigated protected crops. 

Available in 100 Gemini sachets, 200 mini sachets, or in loose material in 1 liter containers, 25,000 predatory mites.

Andersoni occurs naturally throughout Europe, including the UK and the Netherlands, and in North America. It is primarily found in areas of grape and apple production, but also in soft fruit, peaches, deciduous ornamentals and conifers.

They prey on spider mites of various species, but also feed on Thrips and russet mites. They may enter diapause in late summer, but are active from early in the season, as well as tolerating high temperatures, provided the atmosphere is suitably humid.

Gemini sachets:
Lift each sachet from the box, pinch the join so that the printed face is outwards and drop the sachet over the crop wire, branch or leaf stalk.

Mini sachets:
Hang from crop wire or plant canopy
Do not hang adjacent to heating pipes
Duration of sachet activity is 6 weeks, though longer-lasting control may be evident if the mites establish in the crop

Gemini sachets:
Use at one per 6.5ft - 13ft of crop row.

Mini sachets:
Use at one per 6.5ft of crop row.

Shaker Tube: 
1 liter containing 25,000 mites
Shake small quantities of Amblyseius andersoni onto the crop. Avoid applying near flowers - the product and its carrier agent will stick to the trichomes.
Introduce Amblyseius andersoni early in the crop/pest cycle to protect against pest build up


Storage and Transport

Keep out of direct sunlight
Transport and store at 50F - 59F
Use within 18 hours of receipt



When and where should you use it?

Apply the sachets to any convenient location on the plant, such as a leaf petiole, twig or small branch. In crops grown against supports, or trained along wires, the sachets can be placed on these structures, but should always be shaded from direct sunlight.

Some mites will be found up to 20 centimeters ahead of the main infestation. Placing the sachets above this mass will allow the predators to feed on the advancing mites before they cause damage: placing sachets lower down means that the predators are approaching this mass from below, and are only able to remove pest mites after the damage has been caused.

For best results, apply the sachets when pest mite numbers are low. The predatory mites will then be able to feed on small colonies of pest mites and prevent them growing and causing major damage. 

Individual Gemini sachets are packed flat into boxes in units of 100. To use the sachets, pick each sachet up with a finger and thumb at the central line. The twin compartments of the sachet should hang down from this central line, forming an inverted ‘V’ shape. Make sure that the printed face of the sachet is facing outwards, and that the un-printed face, on which the emergence holes are situated, is facing inwards. This ensures that water cannot enter the sachet.

Adult female mites lay single eggs onto leaf hairs, and these eggs hatch after 2-3 days to become larvae.  As with other mites in the same family, these molt to produce protonymphs and then deutonymphs as they grow. All mobile stages are predatory, and will feed on eggs, juveniles and adults of spider mites. They are also able to feed on Eriophyid mites, commonly known as Rust or Russet Mites, which are tiny, worm like mites which can cause major damage on some crops.

As days become shorter and temperatures decrease in early autumn the mites will enter diapause, a state in which they can successfully survive winter conditions. They are reported to become active again as early as January, but this will be dependent upon ambient temperature and food availability.

How should you use it?

Amblyseius andersoni is intended as a preventive treatment for spider mite and other mite pests, which is best used before pest populations have reached high levels. If pest mite populations are very high, and major damage is visible on the crop, use an alternative treatment such as an acaricide prior to the introduction of Amblyseius andersoni.

When should you not use it?

Used as directed, Amblyseius andersoni will control or limit spider mite populations and significantly reduce pest damage. On some crops no other treatment is necessary. In other crops the additional use of Phytoseiulus persimilis or acaricides to control pest mite outbreaks may be necessary.

What will it do?

Amblyseius andersoni will not give control of whitefly, thrips or aphids. It is a predatory mite which is intended for control of mite pests. Where pest populations are high at the time of release, control may be slow to occur and damage to the crop will continue. 

What will it not do, and what are the control options?