Alokasie - recognize and combat diseases and pests

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There are several pests that can make Alokasie's growth more difficult. If you recognize and act in good time, the worst will be prevented.

Alokasie diseases pests

The tropical plant makes certain demands on its environment. Failure to do so weakens the plant, making it more susceptible to disease and pest infestation. You can do a lot to keep the Alokasie healthy, if you water the plant well enough, avoid waterlogging, provide high humidity and a bright but not too sunny location, and ensure consistent temperatures.

Alokasie is susceptible to infestation with:

  • White flies
  • spider mites

  • aphids
  • scale insects

White flies - the leaves are in danger

If the plant is attacked by the white fly, this will not escape the attentive plant friend. When you look at the leaves, sticky honeydew is noticeable. These are the excretions of insects. In addition, the leaves get spots and yellow gradually. The white flies are also optically good to see, because they fly up when the plant is touched.

What should I do?

Ventilate well. If the plant is in the greenhouse, spiders or parasitic wasps can be used as natural predators. If the plant is standing on the window sill, you can also use yellow sheets. These specially coated stickers can be attached directly to the plant. The insects are attracted and stick to the yellow sticker.

Spider mites - the stubborn destroyer

Although unwanted, spider mites are unfortunately frequent guests of the Alokasie. Especially in the spring, the infection occurs frequently and on the leaves show small bright spots that merge quickly into a larger bronze-colored spot. These are suction points which discolour by the ingress of air. If the plant is already severely affected, a delicate network of webs is also shown.

What should I do?

For natural control, some methods are suitable. Even if no 100% guarantee is given, by simply showering off the plant, more than 90% of the pests can be removed reliably and in an environmentally friendly manner in case of mild infestation. Use a medium-hard jet of water and direct it to the undersides of the leaves.

" Tip: If the root ball is packed in a plastic bag and sealed airtight before being washed off, the plant will not be soaked and the pests will not be able to get into the potting soil.

If the infestation is rather manageable, you can also treat the individual leaves with a detergent solution. Oviposition occurs predominantly in the corners of the leaf veins. To completely destroy the infestation, this treatment should be done regularly.

An effective natural control is also the treatment with vegetable stock. For this purpose, brew nettle leaves, pieces of garlic or onions and leave to simmer for about 24 hours. The plants can be poured with these solutions, or you can spray all infested plant parts thoroughly.

Spider mites have some natural predators. If you have the opportunity, you can use natural predators such as ladybirds, parasitic wasps, lacewings or robber bugs.

Aphids - destroyer at work

The infestation with aphids is unfortunately not uncommon. If they are observed, they have settled on the plant to suck the nutritious sap. The leaves wither and turn to yellow and eventually fall off. Nevertheless, the elimination of aphids is not a great show of strength and the Alokasie survives this usually without major damage.

What should I do?

In mild infestation, the aphids can usually pass through a long shower with warm water. If some detergent is added to the water, the solution can be used to clean the leaves. Affected plant parts can also be cut off. The Alokasie tolerates appropriate cutting measures all year round.

Spraying with a solution of nettle leaves, onions or garlic also promises success. Another possibility are natural predators such as gall midges, spiders or ladybirds.

Scale lice - the stubborn suckers

Scale lice are literally sucked on the plants and feed on their sap. This takes away the energy of the plant. If the infestation remains undetected for a long time, the affected plant can be seriously damaged.

What should I do?

Even if the scale insects are well visible to the naked eye - a courageous collection is usually not a good idea.If you catch a pregnant female, the eggs may spread throughout the plant during this procedure. The scraping with the help of a knife should be done carefully. The eggs are stored directly under the tank.

Some patience requires the individual treatment of the scale insects. Use a cotton swab soaked in dishwashing liquid or alcohol and press it on the scale.

" Tip: Scale insects are quite hard to fight. If the infestation was not detected early, it is often not around a chemical control around.

Small 1 × 1 pest control

White fly▶ frequent ventilation
▶ Spiders or parasitic wasps as natural predators
spider mite▶ Shower off the plant
▶ Rub in leaves with detergent solution
▶ Sud of nettle leaves, onions or garlic
▶ Gall midges or parasitic wasps as natural predators
aphids▶ Wipe leaves with detergent solution or shower off the plant
▶ Use stinging nettle or onionsuds
Ladybugs, spiders or gallmicks as natural predators
Scale insects▶ Wipe clean with detergent solution or alcohol
▶ Carefully scrape off pests
▶ chemical attack in case of heavy infestation

Yellow leaves - what now?

The leaves are the whole adornment of Alokasie. It will all the more attract attention when they suddenly appear dull and lackluster or even yellow.

This can have several causes:

  • The leaf is old and dies of course.
  • Waterlogging is present - plant needs new substrate as fast as possible.
  • Plant is too dry and needs more humidity.
  • The plant is too cold and should change location urgently.

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