Recognize, control and prevent aphids

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Recognizing aphids

Aphids are small, round insects of a few millimeters in size. They are easy to spot with the naked eye. The bugs can be green, yellowish, black or gray in color. Some aphids have wings and can therefore spread quickly. The bulbous insects like to sit in groups near the buds of flowers, on stems or on the underside of leaves.

Zwarte bladluis Zwarte bonenluis op blad

Black aphids

Some aphids are very dark, such as the black bean aphid. Lice can also be green, yellowish, brown or gray in color.

Bladluis wit op blad vervelhuidjes

White aphids

White bugs on the leaves? These are not bugs but molts of aphids. When you see the white molts, you know there are aphids on your plant.

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Sticky leaves

The aphids absorb too much sugar from the plant sap and secrete it as a sticky and translucent liquid. This is called honeydew.

Mieren die bladluizen melken voor honingdauw

Ants and aphid

Ants love honeydew and flock to it en masse. In exchange for the sweet drink, the ants protect the aphids.

Katoenluis met vleugels

Winged aphids

If there are many aphids together and it becomes very busy, the female aphids will produce winged offspring. The aphids with wings can fly away in search of another plant with more space.

Aphid development

Aphids quickly become a pest because of their extraordinary reproduction rate. At warm temperatures, females can clone themselves, causing viviparous young to immediately start absorbing plant sap. If a plant becomes overcrowded, some aphids develop wings and fly to other plants. In the fall, females produce males for sexual reproduction and eggs are laid. The eggs overwinter and new females emerge in the spring.
Under optimal conditions, aphids can mature within a week. Females can produce between 40 and 100 offspring, which amounts to 3 to 10 offspring per day.

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Aphid damage

Aphids suck plant sap from leaves, causing the plant to weaken and grow less well. If there is a large infestation of aphids, the leaves may deform and young plants may die. Aphids can also transmit plant viruses from plant to plant.

Aphids prefer young and healthy leaves and growing tips. Plants that are sensitive to aphids are roses, apple trees, or houseplants with soft leaves such as Calatheas or Alocasias.

Anthurium met gele vlekken en witte velletjes

Yellow spots on leaves

Because the aphids suck on the leaf, the plant cells die and the leaf turns yellow. You can also see the white molted skin of the aphid in this photo.

Boterbloemluis op blad gele vlekken en witte velletjes

Brown spots on leaves

In the photo you see buttercup aphids that have sucked plant cells dry. The cells first turn yellow and then brown. You can also see white molting skin of the aphid.

Roetdauw schimmel

Sooty mold

Sooty mold is a collective name for fungi that grow on honeydew. The fungi grow on the sugars on the leaf and form a black layer. The fungi are harmful to the plant.

Control aphids

Aphids reproduce very quickly. Therefore, take action immediately when you see the first aphid. Cut off the affected parts of the plant and spray the plant with Plant Soap . Once the liquid has dried, use Carna lacewing larvae or Puncta ladybirds to combat the aphids naturally.

Groene gaasvlieg larve bestrijdt bladluis

Lacewings against aphids

You can easily scatter Carna larvae over your houseplants or low garden plants. Carna is also very suitable for the vegetable garden. The young lacewing larvae immediately look for aphids and eat them.

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Lieveheersbeestjes larve bestrijdt bladluis

Ladybug larvae

Puncta ladybug larvae are best used if you have many aphids in one place. Ideal for shrubs, hedges or other plants in the garden. You can also use Puncta indoors. You will receive the product as dark larvae of a few mm in size. If you're lucky you'll see the adult ladybugs emerge!

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Plant soap op blad sprayen

Why use Plant Soap?

A large number of aphids can be challenging for natural enemies to overpower. In that case, it is advisable to first clean the plant with Plant Soap as a preparatory treatment. Afterwards, the Insect Heroes can be spawned.

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Preventing aphids

To prevent aphids, it is advisable to check the leaves, shrubs or tree regularly. Especially the underside of the leaves, where the aphids like to live. Fertilize the plants well during the growing season and water them regularly. They also like to rinse the plants every now and then and this also sprays off any possible bugs.

Prevent aphids in houseplants
Make sure the plants are not exposed to draughts. The plants do not like this and aphids can enter your room unnoticed from outside. If you suspect aphids, you can also clean the leaves with Plant Soap .

Preventing aphids in the garden
To prevent aphids in the garden, it is best to attract natural enemies. Plant native plants in the garden that are attractive to insects. Create mess corners in the garden where insects can hide. You can also place strong-smelling plants in the garden, such as garlic next to a rose, to protect the rose.

Groene perzikluis op onderkant blad

Check the underside of the leaves!