Amblydromalus andersoni
Overview
Amblydromalus andersoni (formerly widely known as Amblyseius andersoni) is a generalist predatory mite used in biological control programmes against spider mites, broad mite and other small pest species.
It is particularly valued for preventative use and its ability to remain active under a wider range of temperatures than some other predatory mites.
Type
Generalist predatory mite.
Target Pests
Primary Targets
- Spider mites
- Two-spotted spider mite
- Broad mite
Secondary Targets
- Rust mites
- Small mite species
- Alternative prey and pollen
Identification
Adults are pale beige to light brown predatory mites.
They move more rapidly than pest mites and are commonly found on leaf surfaces and around growing points.
Why Andersoni is Important
Andersoni is often used as a preventative predator because it can survive on alternative food sources when pest populations are low.
This allows populations to establish before damaging outbreaks occur.
Environmental Requirements
Temperature
Performs across a broad temperature range.
Can remain active under cooler conditions than some warm-season predatory mites.
Humidity
Moderately tolerant of varying humidity conditions.
Alternative Food Sources
Can utilise pollen and other food sources when pests are scarce.
Crops Commonly Used In
- Strawberries
- Ornamentals
- Nursery stock
- Soft fruit
- Apples
- Pears
Strengths
- Preventative spider mite control
- Broad temperature tolerance
- Can survive on alternative food
- Suitable for protected and outdoor crops
- Useful against broad mite
Limitations
- Slower curative action than Phytoseiulus
- Requires time to establish
- Less effective against severe spider mite outbreaks
Works Well With
Monitoring Establishment
Look for:
- Predator activity on leaf surfaces
- Reduced spider mite egg survival
- Stable predator populations before outbreaks occur
Common Questions
Can Andersoni control severe spider mite outbreaks?
It is generally better used preventatively. Severe outbreaks often require specialist predators such as Phytoseiulus.
Does Andersoni survive without pests?
Yes. It can utilise pollen and alternative food sources.
Can it be used outdoors?
Yes. Andersoni is commonly used in outdoor fruit and ornamental systems.