Seeds Pests and diseases

White flies

21.01.2021

General
 
Despite its name, the whitefly is not a fly, but a whitefly from the Aleyrodidae family. It is related to the aphid and also feeds on plant juices. Of course, also from those in cannabis and the flowers that will later become marijuana. As a rule, one meets the greenhouse whitefly or the tobacco whitefly. Their body is actually yellowish, but is covered with snow-white wax dust.
 
damage
 
White flies also feed on leaves and suck out their sap. In doing so, they release honeydew, a sticky secretion that is also typical of aphids. The cannabis plants and cannabis flowers lose their natural color and strength, dry out and wither - or even die. In addition, whiteflies are known to be carriers of various viral plant diseases.
 
identification
 
Whiteflies can be found using a simple method by gently shaking the hemp plant or its branches. When it is infested with whitefly, the adults whiz outside and then fly back. No other pest carries the telltale white or flies so well and occurs in such large quantities.
 
prophylaxis
 
Flypaper can be used as a basic prevention. Otherwise, the plants should be well cared for to avoid whiteflies: do not water too much, adequate and regular ventilation with outside air that is filtered if possible. White flies also rarely appear at temperatures below 27 degrees.
 
Elimination
 
If whiteflies are discovered on the beloved hemp plants, a variety of biological agents can be used successfully to defend them. But spray can also be made from garlic, cinnamon oil or chili peppers. Ladybirds or the parasitic wasp Encarsia formosa can also be used against whiteflies.