Dear colleagues,
Now we have serious problems with whitefly in tomato at the greenhouse. Always we use Encarsia system from Biobest (Encarsia formosa, parasitic wasps) for control of these pests. Unfortunately, now our problems is increased due to damaging of sensor control system in block. Can you advise me another, more effective biological method against the whitefly in tomato?
Sincerely, Mehdi Ali.
Whiteflies have apparently become resistant to many common insecticides. Biological control with entomopatogenic fungi like Aschersonia aleyrodis, Verticillium lecanii and Paecilomyces fumosoroseus are the best option to control whitefly outbreaks in tomato. The combination of entomopatogenic fungi and parasitic wasps like Encarsia formosa is the best method of control. Also some predators like Chrysoperla, Orius, Geocoris, Colleomegilla, Coccinella, are usefull as a complement with bio rational treatments. Cultural control practices such as removing fallen and dry infested leaves with pupae in the greenhouse is important.
The natural enemies of whitefly include spiders, lacewings, hoverflies, ground beetles, mirid bugs. The adults and larvae of some ladybirds also feed on nymphs of whiteflies. Along with that you can again use Amitus fuscipennis for the replacement of Encarsia formosa for effective control of white flies in tomato.
In this list of labboratory producers of entomopatogenic fungi in Europe, USA, Africa and Asia and with the trade name of the product you can search suppliers in the internet.
https://naldc.nal.usda.gov/download/11204/PDF
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