How to treat red spider mites on Alocasia macrorrhizos (giant taro)? Introduction to prevention and control methods

Many gardening enthusiasts don't know how to treat red spider mites on Alocasia macrorrhizos, and buying and spraying pesticides is troublesome. The editor will tell enthusiasts a little trick - one move can take care of red spider mites on Alocasia macrorrhizos, and it works every time.

On an Alocasia macrorrhizos infested with red spider mites, the leaf surface is rough with a waxy texture, and the leaves begin to turn yellow. If you look closely, there are also spider silk threads on the leaf surface. At this point, enthusiasts need not worry, because red spider mites won't cause the Alocasia macrorrhizos to die.

Now let's talk about the little trick. Enthusiasts should first prepare a washbasin, then start lathering soap to make a basin of soapy water - a dilute one will do. Then use a cloth to wipe all the leaves of the Alocasia macrorrhizos (be gentle), trying to wipe the red spider mites clean. Of course, it doesn't need to be too clean, because if you wipe for too long, the Alocasia macrorrhizos leaves may be damaged.

After wiping, change to a basin of clean water and wipe the leaves again, mainly to remove soap residue.

After one week, repeat once more. By this time, you should be able to see that the Alocasia macrorrhizos has significantly improved. I have seen many Alocasia macrorrhizos plants with more or less red spider mites. Those who are more diligent can try wiping and washing - it really works.

Prevention and control measures for yellowing leaves of Alocasia macrorrhizos, and an introduction to its treatment methods and techniques

When it comes to Alocasia macrorrhizos, I believe everyone is familiar with it. Alocasia macrorrhizos stays green all year round and has extremely high ornamental value. Once the leaves turn yellow, its ornamental value is greatly reduced. So, do you know the prevention and control measures for yellowing leaves of Alocasia macrorrhizos? Let's learn together with the editor.

1. Give Alocasia macrorrhizos reasonable lighting conditions. Alocasia macrorrhizos prefers a semi-shaded environment. During care, pay attention to shading, but remember not to place it in a dark environment for a long time. In addition, also pay attention to ventilation in the environment and keep the air flowing.

2. Alocasia macrorrhizos has a high water demand. Water whenever the soil starts to dry, and water thoroughly at one time until water flows out from the bottom of the pot. When watering Alocasia macrorrhizos with yellowing leaves, there should be a regular pattern - do not let the potting soil stay too dry or too wet for a long time. While watering, use a spray bottle to clean the leaves as well, keeping the leaves clean, and you can also see the water rolling off the leaves.

3. Alocasia macrorrhizos does not have high soil requirements, but the fertility of the potting medium must be ensured. To solve yellowing leaves of Alocasia macrorrhizos, choose sandy loam or humus loam containing organic matter, replace the soil in time, and increase nutrients. To increase the plant's own resistance, do not use only nitrogen and phosphorus fertilizers. Use them alternately with organic fertilizers. Applying a little ferrous sulfate will make the leaves larger and greener.

4. Keep the living environment of Alocasia macrorrhizos warm and humid. In winter when the weather is cold, move it indoors in time; slowly change the living environment of Alocasia macrorrhizos so that it adapts to changes in ambient temperature, and remember never to place Alocasia macrorrhizos in an environment where the temperature fluctuates abruptly.

5. Prevent man-made damage to Alocasia macrorrhizos. The sap of Alocasia macrorrhizos is toxic, so try to avoid contact with its body. When red spider mites appear on the plant, spray with 40% dimethoate emulsifiable concentrate at 1000 times dilution or 80% dichlorvos at 1000-1500 times dilution to prevent yellowing leaves of Alocasia macrorrhizos.

The above is all the content I have learned about Alocasia macrorrhizos today. I hope enthusiasts will find it helpful after reading this article. If you want to learn more about Alocasia macrorrhizos, please continue to follow Duorou Huapu, and we will provide you with more related knowledge!

Pest and disease control methods for Alocasia macrorrhizos

Diseases of Alocasia macrorrhizos show up on the leaves. Generally there are two kinds: one is leaf spot disease, and the other is anthracnose. For leaf spot disease, spray the leaf surface with chlorothalonil or carbendazim at 800 times dilution, 2-3 times in a row, with 7 days between each application. For anthracnose, spray the leaf surface with 75% thiophanate-methyl at 500 times dilution, once every 7 days, 2-3 times in a row, and it can basically be controlled. Because Alocasia macrorrhizos is a foliage plant, once the leaves become diseased, it will inevitably affect its ornamental effect, so prevention should be the priority.

On the stems, there is a kind of wilt disease caused by bacterial infection. This disease is not easy to detect at first, but once discovered it is already very serious. If you find that the stem is leaning to one side, or there is a wilting spot, it must be wilt disease. You can use a small knife to cut out the diseased part. The boundary between the diseased part and the healthy part is very obvious, and generally you can break 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 again after ten days, and it can basically heal after 20 days.

The most serious pest of Alocasia macrorrhizos is mites, namely what is commonly called red spider mites. Red spider mites generally live on the underside of leaves. They not only suck the nutrients from the leaves but also spread various viruses. They greatly affect plant growth, so you must check frequently and treat immediately once found. You can use medications such as mite killers, acaricides, and imidacloprid for treatment. Imidacloprid and other medications for treatment.

In addition, common pests and diseases of Alocasia macrorrhizos also include snails, scale insects, ants, earthworms, and aphids. The prevention and control methods are introduced separately below:

Snail - the shell is slightly thick, glossy, and elongated-ovate in shape, with a shell height of 130mm and shell width of 54mm. It has 6.5-8.0 whorls, the spire is conical, and the body whorl is swollen. Commonly controlled by manual capture, or by inserting 1-2 cotton swabs with dichlorvos into the potting soil, then covering with a plastic bag and fumigating for 2 hours before removing.

Scale insect - the body is orange-red, with black hairs and white waxy substance on the back. Some stick to the branches and stems of flowers and trees, some lie in the middle of the leaf veins on the front or back of leaves. After sucking sap, the leaves turn yellow and fall off, and the branches become shriveled. Some also adhere like cotton to the branches, stems, and fruit stalks of flowers and trees (because there are many types of scale insects, they are not listed one by one). Commonly controlled by gently brushing them off with a soft brush, then applying diluted dichlorvos; or by using scale insecticide.

Ant - the body is relatively small and dark brown. You should know what they look like specifically. Commonly controlled by inserting a cotton ball with dichlorvos into the drainage hole at the bottom of the pot, or by immersing the pot in water to eliminate them.

Earthworm - the body is bilaterally symmetrical and has segmentation; it has no bones, and the body surface is covered with a thin pigmented cuticle. Commonly controlled by watering the potting soil with deltamethrin at 500 times dilution, or by using diluted superphosphate to drive earthworms out of the pot.

Aphid - a small greenish-yellow insect with many species, mostly occurring on the buds, tender stems, tender leaves, or flower buds of ornamental flowers. Commonly controlled by spraying with 40% dimethoate emulsifiable concentrate at 3000 times dilution or by spraying with 80% dichlorvos diluted with water at 1000 times.

When using pesticides, note that some plants are allergic to pesticides, and never use pesticides at too high a concentration.

The above is the pest and disease control methods for Alocasia macrorrhizos introduced by the editor. I hope it can help you. For more information about pests and diseases of Alocasia macrorrhizos, please continue to follow the Flower Channel.