Important pests of protected crops. Adults usually found laying eggs on the underside of the youngest leaves. Newly hatched larvae are mobile for a few hours before settling as immobile 'scales' where they suck plant sap.

High numbers of whitefly produce large quantities of honeydew encouraging black sooty mould. 

Whitefly Control Products

Encarline  Encarisa formosa
A parasitic wasp. The adult lays 60-100 eggs singly into whitefly scales, which turn black as the parasite develops. Encarsia are introduced as pupae either on cards, which are hung within the crop or are introduced as loose black scales.

Used to control glasshouse whitefly Trialeurodes vaporariorum with limited control of cotton whitefly Bemisia tobaci. 

Eretline  Eretmocerus eremicus
A parasitic wasp. The orange/yellow coloured adult wasp Eretmocerus lays an egg next to and slightly below developing whitely larva. This hatches and feeds on the whitefly larva finally pupating within the empty host skin as a light yellow 'mummy'. A small hole may be found after the adult wasp emerged from the whitefly pupa. The parasitoid can attack, kill and develop in several whitefly species including Bemisa tabaci (cotton whitefly) and Trialeurodes vaporariorum (glasshouse whitefly).

Use on heated, edible and ornamental crops (+16°C) this wasp can be used throughout the year. On other crops use late spring to late autumn; ideal for poinsettia crops. 

This parasite is released under licence only. Please contact for more details. 


Macroline  Macrolophus pygmaeus 
A predatory bug. Adults and nymphs attack all stages of pest. Used for whitefly but will also feed on leafhopper, caterpillar, leaf miner, spider mite and most soft bodied prey. Introduced early season mainly on tomatoes (not cherry tomatoes) and aubergines. In some situations can be used on ornamentals and other crops but consult Fargro for advice.

Long generation time of six weeks means that it takes time before it exerts a significant effect on the pest populations and other controls will be necessary before it is fully established. Establishment can be improved by additional feeding. 

Swirskiline  Amblyseius swirskii 
A predatory mite. which can survive in the absence of prey feeding on pollen and mould. Feeds on whitefly (Trialeurodes vaporariorum and Bemisia tabaci) eggs and larvae, as well as, to a lesser extent, spider mite and thrips. It will not control established populations or where large numbers of adults are moving into the crop.

Introduce early into the crop cycle, to protect. Requires a minimum temperature of over 18°C.

This predator is released under licence for use on glasshouse grown crops, please contact for further details.