The introduction of ladybirds, hoverfly larvae, lacewing larvae and several parasitic wasps in a garden situation will reduce numbers. Biological control is successful in a protective environment.
Recent research has shown the benefits that are provided by earwigs. Providing shelter for insects like earwigs in the garden may help to increase their numbers.
Unfortunately, aphid infestations can often build up on plants before the natural enemies are active in sufficient numbers, so natural predators will only have limited control success.
It's been suggested that most infestations are tolerable, with yields seldom impacted. However, if you believe your infestation is heavy, please read on to our chemical alternatives.