To combat the appalling white fly invasion that was tormenting Melbourne gardeners in summer 2013 we introduced a parasitic wasp and a mite. They are susceptible to certain sprays – so we eliminated those pesticides to give them every chance to do their work. We saw a definite improvement in white fly control.
We used Montdorensis mites from and Encarsia formosa (parasitic wasp)
This year (2015) we have engaged the services of IPM Technologies and have jumped feet first into managing our pests in a sensible and intelligently planned manner. This has been a bit nerve wracking as it means a lot more monitoring of pests and NOT reaching for the spray pack. Angelica from IPM Technologies regularly inspects the nursery and is the source of amazing photos of what is going on around the nursery. At this point we have not sprayed the roses at all (unheard of!) and sprayed once for Pear and Cherry slug. We introduced a predatory mite (Persimilis) into our poly tunnel which rapidly cleared up a burgeoning spider mite infestation before it became a problem. Apart from that, it has been a matter of watching and waiting and allowing the natural predators which were visibly there, to build up in numbers and control the aphids on the roses and Silver Birches.