All mobile stages of Macrolophus pygmaeus, from the first instar to the adult, are voracious predators of many small invertebrates (mainly whiteflies). When established on the crop Macrolophus makes a significant contribution to the control of other pests such as spider mite, caterpillar and leafminer, but is not recommended specifically for control of these pests. Spider mite in particular is a poor-quality diet, and results in slow growth and low fecundity.

It is not recommended for use to control other pests such as spider mite, although once established in the crop it will contribute to their control.