Whitefly in the greenhouse

Measures to combat

You can choose from the following methods to combat whitefly:

• Yellow stickers
• Parasitic wasps
• Relocation of affected plants
• Home remedies

Yellow stickers

Yellow stickers are yellow-colored adhesive tape that you hang from the ceiling of your greenhouse. White flies jump on the paint and stick to the sticky film. You can find the utensils in every specialist shop. After a while, you should get your Yellow stickers switch.

Parasitic wasps

The ichneumon wasp is the natural predator of the white fly, but is completely harmless to your plants. The trade offers small pouches from which the beneficial insects hatch. However, the application is only possible under a few restrictions, namely if

• the temperature in your greenhouse is at least 18 ° C.
• the humidity in your greenhouse is at least 70%.
• the beneficial insects can find sufficient food on site.
• You have enough patience.
• You want to control the infestation between March and September.

Relocation of affected plants

If only a few plants are infested with the whitefly, you should isolate them as soon as possible so that the pest does not spread to healthy specimens. This is very easy with potted plants. If you have to dig up a crop, you should weigh upwhether the risk that this will survive the change of location is really worth it. How to proceed with the isolation:

1. Choose a distant beach location.
2. It should be cool and airy.
3. Control the plant well.
4. As soon as you can no longer see any flies, place the plant in its old location.

Home remedies

The following home remedies from our own production are effective:

• Water-rapeseed oil solution
• Soft soap
• Plant basil
• Shower plants with cold water (helps against maggots)
• nettles or cabbage soaked in water