How to treat pests on Calathea orbifolia? 3 pests and 2 diseases: control and medication methods

Growing Techniques Jan 1, 1970 0 views

As a beautiful foliage plant, Calathea orbifolia has richly colored leaves, with white, green and red in equal measure, looking extremely beautiful! But when grown indoors, due to differences in environment and negligence in care, it will encounter many problems, such as pests and diseases. So how do you treat pests on Calathea orbifolia?

I. How to treat pests on Calathea orbifolia

In the process of growing Calathea orbifolia, for various reasons, it is unavoidable to encounter pests and diseases. The main pests are aphids, scale insects and red spider mites, and the diseases are leaf spot and southern blight; their appearance will harm the health and beauty of the plant. As for how to treat pests on Calathea orbifolia, everyone should spray medication in time for prevention and control.

II. Pest and disease control for Calathea orbifolia

1. Aphids on Calathea orbifolia

If you find pests on Calathea orbifolia, it is very likely aphids, because they are the main pest of foliage plants. These insects generally appear on tender leaves and newly grown buds, living by sucking the sap from the leaves, causing the leaves of Calathea orbifolia to turn yellow, and at the same time black or yellow diseased spots will appear.

Control method: when there are few aphids, manual aphid control can be adopted, using a writing brush or brush to brush the aphids off and bury them in the potting soil; when there are many scale insects, spray 40% omethoate 1500x solution or 90% trichlorfon solution for control. Usually pay attention to reasonable watering and fertilizing to improve its resistance to pests and diseases.

2. Scale insects on Calathea orbifolia

When the environment is not ventilated and care is improper, Calathea orbifolia is also prone to scale insects. These insects attach to the leaves, absorbing nutrients and water from them, causing poor growth of Calathea orbifolia. Moreover, the leaves eaten by scale insects will also cause other diseases, and in severe cases will directly lead to the withering and death of Calathea orbifolia.

Control method: when there are few scale insects, manual treatment with a brush can be used; if a large number of scale insects are found, in addition to manual removal, spraying medication is also needed for control. The agent can be 50% malathion 1500x solution, or 255 phosmet 1000x solution for control; spray once a week, and two consecutive sprays can effectively control them.

3. Red spider mites on Calathea orbifolia

Besides aphids and scale insects, red spider mites are also a main pest of Calathea orbifolia. These insects often occur when ventilation is poor, mainly piercing their mouthparts into the leaves of Calathea orbifolia to suck sap, damaging the plant's chlorophyll, causing the leaves to turn yellow in mild cases, and even leaf drop in severe cases, seriously affecting its ornamental value.

Control method: after discovering the pests, you can treat them with decis, or use sprays such as 25% fenbutatin oxide emulsifiable concentrate 800x solution, 73% propargite 2000x solution and other medications.

4. Leaf spot on Calathea orbifolia

Calathea orbifolia has strong adaptability and can be said to rarely get sick, but in a high-temperature, unventilated environment, it can also suffer from leaf spot. In the early stage of the disease, small yellow-brown spots appear on the leaves of Calathea orbifolia, and halos also appear at the edges; in severe cases, the spots will rapidly spread to every branch and leaf of Calathea orbifolia, and finally cause it to wither and die.

Control method: after discovering the above symptoms, promptly cut off all diseased branches to reduce the source of disease; then spray relevant agents, choosing 38% oxadixyl, pyrimethanil and kresoxim-methyl 800-1000x solution, or 4% flusilazole 1000x solution, spraying once every week, and three consecutive sprays will show results.

5. Southern blight on Calathea orbifolia

Among the pests and diseases of Calathea orbifolia, southern blight is also something everyone needs to pay attention to. This disease is often more serious in July and August, but also occurs frequently at ordinary times, often because the soil is too wet and poor. When the disease occurs, it causes purple-brown spots on the leaves, followed by an obvious white mycelium layer, and in severe cases the plant withers and eventually dies.

Control method: after discovering the above symptoms, promptly spray fungicides such as carbendazim, Bordeaux mixture and lime sulfur mixture on the stem base of the plant and on the substrate; or, after the disease occurs, directly remove the infected potting soil and sprinkle pentachloronitrobenzene powder or lime on it.

Regarding the pest and disease control of Calathea orbifolia, the editor has introduced this much. I believe everyone should know what to do when encountering pests or diseases on Calathea orbifolia again! In general, the cultivation method of Calathea orbifolia is not difficult; as long as everyone cares for it carefully, insects will not come looking for it. Finally, may everyone's Calathea orbifolia grow beautifully~

What to do when Ardisia crenata has insects: pest and disease control for Ardisia crenata / 2 pests and 3 diseases, medication spraying

Flower lovers should be familiar with Ardisia crenata. It is a very famous Chinese medicinal material, and after being used as medicine it can treat various human diseases. What is even more precious is that Ardisia crenata also looks good, so it is kept at home by many people. However, during cultivation, pests and diseases often appear. So what should be done when Ardisia crenata has insects? The following are several pest and disease control methods for Ardisia crenata; let's take a look together!

I. What to do when Ardisia crenata has insects

During the care of Ardisia crenata, attention should be paid to pests and diseases to avoid the plant being harmed. It is understood that the main pests and diseases of Ardisia crenata are: aphids, beet armyworm/spodoptera litura, root-knot nematode disease, stem rot and root rot; their appearance will all have serious consequences. As for what to do when Ardisia crenata has insects, everyone should first confirm the specific pest or disease, then spray the corresponding medication.

II. Pest and disease control for Ardisia crenata

1. Aphids

Aphids are the most common pest of indoor potted plants, and they also harm the health of Ardisia crenata. These insects generally appear in poorly ventilated and poorly lit environments, mainly harming leaves and buds, sucking large amounts of sap, and causing leaves to turn yellow, curl, and even fall off.

Control method: when there are few aphids, manual aphid control can be adopted, using a writing brush or brush to brush the aphids off and bury them in the potting soil; when there are many scale insects, spray 40% omethoate 1000x solution or 50% dichlorvos 1000x solution for control, spraying once every 7-10 days, and 2-3 consecutive sprays will show results.

2. Beet armyworm / Spodoptera litura

Besides aphids, under high temperature and high humidity and unventilated conditions, Ardisia crenata can also be attacked by moth pests, among which beet armyworm and Spodoptera litura appear most often. They live by eating the leaves of the plant, and in severe cases can eat all the leaf flesh, leaving only the veins, and even peel and eat the stem cortex.

Control method: first, promptly remove egg masses and infested leaves and destroy them together to reduce the source of disease; then spray cascade, chlorfluazuron, Lannate, Kuishaling 1000x and others in time for control, because this insect has a thick body wall and strong pesticide resistance, so early control must be grasped in prevention and treatment.

3. Root-knot nematode disease

Besides insects, under improper care, Ardisia crenata can also get sick, such as root-knot nematode disease, a root disease caused by root-knot nematodes. After suffering from this disease, tumor-like root nodules of varying sizes will form on the fibrous roots and lateral roots of Ardisia crenata. In addition, this disease also causes the plant to be short and stunted.

Control method: this disease is mainly prevented. Before planting, evenly apply 15 grams of 3% carbofuran granules into the potting soil, then cover with 10 cm of soil, and then water thoroughly; generally this can eliminate many kinds of pests.

4. Stem rot

Ardisia crenata is not cold-tolerant. In winter, watering should be controlled. Once watered too much or the potting soil drains poorly, plus the indoors being dark, it is very easy to cause stem rot. It is understood that Ardisia crenata mostly suffers from stem rot at the seedling stage, and when the disease occurs, the plant's stem turns black and rots.

Control method: after discovering the above symptoms, cut off the rotten parts of the plant, apply sulfur powder, then replace with fresh culture soil and replant. After that, move the potted plant to a ventilated and sunny place, and before long it will recover its health.

5. Root rot

If it is in a high-temperature and high-humidity environment for a long time, Ardisia crenata is also prone to outbreaks of root rot. This disease mainly harms the roots of Ardisia crenata, causing root rot, and in severe cases, the whole plant dies. It should be noted that underground pests will worsen the condition.

Control method: root rot of Ardisia crenata is mainly prevented. During daily care, strictly follow the watering method for Ardisia crenata and do not water too much; in the early stage of the disease, spray agents such as cascade, chlorfluazuron and Lannate for control.

Regarding the pest and disease control of Ardisia crenata, the editor has introduced this much. I believe everyone should know what to do when encountering pests or diseases on Ardisia crenata again! In general, the cultivation method of Ardisia crenata is not difficult; as long as everyone is a bit more careful, insects will not come looking for it. Finally, may everyone's Ardisia crenata grow beautifully~

How to deal with pests on Dracaena sanderiana: pest and disease control for Dracaena sanderiana / leaf spot, medication spraying

When growing plants indoors, pests and diseases are something everyone needs to focus on, because their appearance often brings devastating blows to the plant. As a beautiful green plant, Dracaena sanderiana is not only good-looking but also has many benefits, so it is often potted at home by people. Then, during cultivation, what should be done when Dracaena sanderiana has insects? The following are several pest and disease control methods for Dracaena sanderiana; let's take a look together!

I. How to deal with pests on Dracaena sanderiana

Dracaena sanderiana has strong vitality and generally rarely gets insects, but under improper care and poor environment, it can also get insects and diseases. Among them, the main diseases of Dracaena sanderiana are leaf spot, root rot and anthracnose, and the main pests are scale insects and red spider mites. Their appearance will affect the health and beauty of the plant, so once discovered they should be removed immediately!

II. Pest and disease control for Dracaena sanderiana

1. Scale insects on Dracaena sanderiana

Although Dracaena sanderiana is not prone to insects, in poorly ventilated and poorly lit environments, scale insects will also come. These insects generally float and attach to the surface of the plant's leaves, and their secretions pollute the leaves, affecting the plant's photosynthesis, thereby causing the leaves to wilt and inducing sooty mold, doing great harm.

Control method: when there are few scale insects, use a brush dipped in water to gently brush off the insect bodies, then spray white vinegar for prevention; when there are many scale insects, spray 40% omethoate 1000x solution for control, spraying once a week, and 2 to 3 consecutive sprays will show results.

2. Red spider mites on Dracaena sanderiana

Besides scale insects, under high temperature and high humidity and unventilated conditions, Dracaena sanderiana may also get red spider mites. These insects mainly pierce their mouthparts into the leaves of Dracaena sanderiana to suck sap, damaging the plant's chlorophyll, causing the leaves of Dracaena sanderiana to turn yellow and even fall off.

Control method: when individual leaves are damaged, remove the infested leaves; when more leaves are damaged, spray propargite, dimethoate, Huachongjing, fenvalerate and other medications as early as possible for control.

3. Root rot on Dracaena sanderiana

Under improper care, Dracaena sanderiana can also get sick, and the most common is root rot. This disease generally appears when watered too much or the potting soil drains poorly, plus the indoors being dark, causing the roots and stems of Dracaena sanderiana to turn black and rot, and at the same time accompanied by the yellowing of the Dracaena sanderiana stems.

Control method: after discovering the above symptoms, cut off the rotten parts of Dracaena sanderiana, apply sulfur powder, then replace with fresh culture soil and replant.

4. Leaf spot on Dracaena sanderiana

When the indoor temperature fluctuates greatly in a short period, or when watered too much during the dormant period, Dracaena sanderiana is also prone to leaf spot. This disease mainly harms the lower leaves of Dracaena sanderiana. Many small brown spots will appear on the diseased leaves, and in severe cases the spots will cover the entire leaf.

Control method: when the above symptoms are found, promptly remove the diseased leaves and destroy them together to reduce the source of disease; in the early stage of the disease, you can also spray 42% Kejunjing powder 3000x solution on the leaf surface, spraying once every 5-7 days, 2-3 consecutive sprays, and it can basically recover.

5. Anthracnose on Dracaena sanderiana

In the pest and disease control of Dracaena sanderiana, anthracnose is also something everyone needs to prevent. This disease is likely to occur in rainy seasons when humidity is too high and the environment is unventilated. If Dracaena sanderiana shows blackened leaf tips and yellow spots on the leaves, it should have anthracnose.

Control method: when the above symptoms are found, if it is winter or spring, promptly remove the diseased leaves and destroy them, and sprinkle quicklime to disinfect the soil. In the early stage of the disease, spray 75% chlorothalonil 600x solution or 50% thiram wettable powder 500x solution, spraying once every 7-10 days, and 3 consecutive sprays will show results.

Regarding the pest and disease control of Dracaena sanderiana, the editor has introduced this much. I believe everyone should know what to do when encountering pests or diseases on Dracaena sanderiana again! In general, the cultivation method of Dracaena sanderiana is not difficult; as long as everyone cares for it carefully, insects will not come looking for it. Finally, may everyone's Dracaena sanderiana grow beautifully~