Thrips Pest Solution: Amblyseius cucumeris

Amblyseius Description

Amblyseius (Pronounced: AM-BLI-SAY-US) are small very active predatory mites, about 1mm long, pale brown in colour with slightly flattened pear shaped bodies, their eggs are white.

Amblyseius are used to control thrips by growers in commercial horticulture.

Amblyseius cucumeris Life Cycle

Amblyseius adults produce several eggs a day and are quite long lived. Both the adults and young mites eat thrips and may also eat young spider mites.

Amblyseius cucumeris Usage

  • Amblyseius requires a temperature of 18°C (64°F).
  • Amblyseius should be introduced to the greenhouse/conservatory on the day of receipt.
  • Amblyseius are sensitive to long hot dry spells, so damping down or misting can help at these times.
  • Amblyseius sachets should not be placed in direct sunlight or near to heating pipes.
  • Like all Defenders biological controls, Amblyseius is harmless to children, pets and wildlife. 

Biological Thrip Control Product Details

Defenders supply Amblyseius cucumeris in sachets known as "breeder" packs where the mites are mixed with bran. These "breeder" packs are simply hung amongst your plants.  A food supply for Amblyseius is also contained in the sachet, so it is  possible to introduce them into the crop before thrips numbers have built up.

Product Code

Area Treated


Amblyseius 10

10 Sachets, which is sufficient to treat an area of approx. 5 square metres.


Amblyseius 25

25 Sachets, which is sufficient to treat an area of approx. 15 square metres.


All packs of Amblyseius are sent with full release instructions contained in the document wallet on the package.

Remember! Biological controls are living creatures and can be effected by chemical usage. If you have used any pesticides recently check with us before ordering Amblyseius as it may not be possible to use them. 

For heavy infestations of Thrips or if it is too cold, you can use SB Plant Invigorator, an organic spray. This will target colonies and reduce the population. The beneficials can be released as soon as the SB treated leaves are dry but should NOT be used after their release. SB can also be used to spot treat small outbreaks of Thrips.