Introduction to common diseases of Alocasia macrorrhizos (taro plant), explained in one article

Alocasia macrorrhizos (detailed description) is a fairly common indoor foliage plant, named for the water it drips when the environment is humid. Although it is not difficult to grow, it can still get sick. Generally, the diseases of Alocasia macrorrhizos mainly show on the leaves, and there are two kinds: leaf spot disease and anthracnose.

Alocasia macrorrhizos (detailed description)

1. For leaf spot disease, spray the leaves with an 800-times dilution of chlorothalonil or carbendazim, for 2-3 consecutive applications, with 7 days between each. For anthracnose, you must spray the leaves with a 500-times dilution of 75% thiophanate-methyl, once every 7 days, for 2-3 consecutive applications, which can basically bring it under control. Because Alocasia macrorrhizos is a foliage plant, once the leaves become diseased it inevitably affects its ornamental effect, so prevention should be the main approach.

2. On the stems, there is a kind of wilt disease caused by bacterial infection. This disease is not easy to notice at first, but once discovered it is already very serious. If you find the stem leaning to one side, or a wilting spot, then it has definitely developed wilt disease. You can use a small knife to cut out the diseased part; the boundary between the diseased and healthy parts is very obvious, and usually you can snap it off by hand. If the diseased part is less than one third of the stem, you can coat the healthy part with a layer of chlorothalonil solution and keep it dry, then apply another coating after ten days, and after 20 days it can basically heal.

Pest and disease control for Alocasia macrorrhizos

Pest and disease control for Alocasia macrorrhizos

The diseases of Alocasia macrorrhizos show on the leaves, and there are generally two kinds: one is leaf spot disease, and one is anthracnose.

Leaf spot disease

For leaf spot disease, spray the leaves with an 800-times dilution of chlorothalonil or carbendazim, for 2-3 consecutive applications, with 7 days between each.

Anthracnose

For anthracnose, you must spray the leaves with a 500-times dilution of 75% thiophanate-methyl, once every 7 days, for 2-3 consecutive applications, which can basically bring it under control.

Wilt disease

On the stems, there is a kind of wilt disease caused by bacterial infection. This disease is not easy to notice at first, but once discovered it is already very serious. If you find the stem leaning to one side, or a wilting spot, then it has definitely developed wilt disease. You can use a small knife to cut out the diseased part; the boundary between the diseased and healthy parts is very obvious, and usually you can snap it off by hand. If the diseased part is less than one third of the stem, you can coat the healthy part with a layer of chlorothalonil solution and keep it dry, then apply another coating after ten days, and after 20 days it can basically heal.

Alocasia macrorrhizos is a foliage plant, and once the leaves become diseased it inevitably affects its ornamental effect, so the diseases of Alocasia macrorrhizos should be dealt with mainly through prevention and control.

The most serious pest of Alocasia macrorrhizos is mites, commonly known as red spider mites.

Red spider mites

Red spider mites generally live on the undersides of leaves. They not only suck the nutrients from the leaves but also spread various viruses, seriously affecting the plant's growth, so you must check frequently and treat immediately once discovered. You can use medications such as mite clear, saomangjing and imidacloprid for treatment.

What to do about root rot in Alocasia macrorrhizos: treatment methods for root rot in Alocasia macrorrhizos

 Alocasia macrorrhizos is one of the most popular flowering plants for people to grow, but during cultivation root rot often occurs, and in serious cases it can even kill the plant. So what should be done about root rot in Alocasia macrorrhizos? I will now write out the treatment methods for root rot in Alocasia macrorrhizos, and friends who need them can learn from them.

1. Control moisture

There are many reasons for root rot in Alocasia macrorrhizos, and overwatering is one of the important ones. Although Alocasia macrorrhizos is a plant that likes water, you still need to pay attention to moisture supply during cultivation and must not let water accumulate in the pot, otherwise it will cause root rot. Therefore, controlling moisture supply in normal times is a good way to prevent root rot in Alocasia macrorrhizos.

2. Sterilize the soil

When growing Alocasia macrorrhizos, pests and diseases can also cause root rot. When the situation is not too serious, you can disinfect the potting soil in time. The simplest disinfection method is to drip some essential balm around the flower pot, then water after a day, which can let the rotting roots of Alocasia macrorrhizos slowly recover.

3. Treatment methods for root rot in Alocasia macrorrhizos

If the root rot of Alocasia macrorrhizos is relatively serious, you must take it out of the soil, then remove the rotten roots, and soak it in potassium permanganate solution. After a day, take it out and insert it into plain sand. Once the rotten roots have fully healed, prepare fresh potting soil and transplant the Alocasia macrorrhizos into it.