What to do when Dieffenbachia gets pests? Timely pest and disease control in humid environments
I. Solutions for pests on Dieffenbachia
Dieffenbachia leaves are green all year round, but if not cared for properly, the leaves can also turn yellow or rot. So how should we treat pest and disease control in Dieffenbachia? What to do when Dieffenbachia gets pests? If Dieffenbachia becomes sick, it will show the following symptoms, and the treatment for each symptom is different. Let us take a look together:
Brown soft scale
What to do when Dieffenbachia gets pests? In many cases the pest is this one. This insect has complex feeding habits and can harm many plants, and Dieffenbachia is one of the flowers it damages. When the brown soft scale harms plants, it generally gathers in groups on the leaf surface or on tender leaves, piercing and sucking the plant sap, and at the same time excreting sticky liquid. Its excrement easily causes sooty mold fungus to multiply in large numbers, making the stems and leaves turn black, affecting the plant's photosynthesis, causing weak growth and yellowing leaves, and harming its ornamental value. When the infestation is severe, the branches and stems are covered with the insects, causing the plant to turn yellow and affecting its growth.
Dieffenbachia pest and disease control methods: branches and leaves heavily infested with pests need to be pruned off, and choose to spray 20% fenvalerate 2000 times solution, 50% fenitrothion emulsifiable concentrate 1000 times solution, 50% monocrotophos emulsifiable concentrate 1000 times solution, 40% omethoate emulsifiable concentrate 1000 times solution, etc.
II. Dieffenbachia pest and disease control
1. Leaf spot disease
Leaf spot disease occurs on Dieffenbachia leaves, and is especially likely to occur in humid weather. At first the spots are small brown spots, with the surrounding area water-soaked and fading to green, and they expand in concentric rings, round to oval, with brown edges and grayish-white centers. In the later stage, dark brown mold spots appear at the center of the spots, and under humid conditions they become a dark brown mold layer.
Dieffenbachia pest and disease control methods: promptly remove diseased and dead leaves, and in both the early and late stages of the disease, spray with 0.5%-1% Bordeaux mixture (or 50% carbendazim 1000 times solution).
2. Anthracnose
This disease also occurs on Dieffenbachia leaves, and compared with pests on Dieffenbachia, this one is the most frightening; in severe cases it can spread to the leaf stalks. At first the spots are water-soaked small yellow spots, and after expanding they become oval to irregular brown or yellow-brown, slightly showing concentric rings; in the later stage the spots join together into a dry, withered appearance, and produce small black dots arranged in concentric rings.
Solution: This disease is mainly caused by poor ventilation, and the presence of scale insects favors the occurrence of the disease. The method to control this disease is to strengthen care and apply more phosphorus and potassium fertilizer; in the early stage of the disease, spray with 0.3%-0.5% equal-amount Bordeaux mixture (or 60% zineb 800-900 times solution, or 70% thiophanate 1500 times solution).
III. Dieffenbachia dislikes direct strong light in summer
Dieffenbachia likes warm, humid and semi-shaded environments, and dislikes direct strong light in summer. The key to growing Dieffenbachia well is to avoid direct strong light when the weather is hot and the sunlight is intense in summer. Otherwise, it easily causes the leaf tips to dry and the leaf edges to scorch or even turn yellow, affecting the ornamental effect. Therefore, after moving outdoors in early spring, it should be placed under a shaded trellis or under the eaves or in a shaded spot on the balcony, and be careful to prevent rain from falling on it. As for watering, besides keeping the potting soil moist in summer, watering in spring and autumn should not be too frequent, and in winter watering should be controlled.
Dieffenbachia has fleshy roots, so it is most afraid of waterlogging; if watered too much, the roots easily rot. But the air must be kept humid, because if the air is dry, undesirable phenomena such as dry leaf tips also easily occur. In spring and autumn, apply decomposed cake fertilizer water once every 3-4 weeks, which can make the plant grow robustly and keep the leaves green. In addition, around the beginning of summer, several old leaves on the outer part of mature plants should be cut off to favor the sprouting of new buds and new leaves and the emergence of flower stalks. Now that you know what to do when Dieffenbachia gets pests and the analysis of Dieffenbachia pest and disease control methods, do you know what to do?
What to do when Chinese evergreen gets pests: control of 5 common pests and diseases of Chinese evergreen
As a common foliage plant, Chinese evergreen is not difficult to grow, and it looks good, so many people keep it at home. But there are many novice growers, and they simply do not care for it systematically according to the methods, which results in the plant getting pests and becoming sick. So what to do when Chinese evergreen gets pests? For this, the editor has summarized 5 common pests and diseases of Chinese evergreen. Let us go and take a look!
I. Chinese evergreen gets pests, spray with pesticide
Coming home and looking at the large green leaves of Chinese evergreen, eye fatigue is relieved in an instant. But beautiful things need to be carefully cared for by us, and once it is grown improperly and Chinese evergreen gets pests and becomes sick, its ornamental value will be seriously affected. As for what to do when Chinese evergreen gets pests, it is actually very simple: determine the specific pest, then spray the corresponding pesticide to solve it.
II. Pest and disease control of Chinese evergreen
1. Brown soft scale
When it comes to pests on Chinese evergreen, it is generally the brown soft scale. This insect is relatively small and often gathers in groups, mainly attacking the plant's leaves, affecting the plant's photosynthesis, causing Chinese evergreen leaves to turn yellow and harming its ornamental value.
Control method: when brown soft scale is found, it can be brushed off with a writing brush, then rinsed clean with water; then spray 50% omethoate emulsion or 50% monocrotophos, and generally one application can achieve the control effect.
2. Red spider mite
A type of mite, it is also one of the common pests of Chinese evergreen. This pest often occurs when ventilation is poor, and it harms the top of the plant, causing the top of Chinese evergreen to turn red-brown and have spider webs, affecting the plant's growth and development.
Control method: after finding the pest, it can be treated with Decis, or drugs such as spraying 25% anti-mite emulsifiable concentrate 800 times solution, 73% propargite 2000 times solution, etc. can be used.
3. Leaf spot disease
When the indoor temperature fluctuates greatly in a short period, or when watering too much during the dormant period, Chinese evergreen is prone to leaf spot disease. When the disease occurs, many small brown spots appear on the Chinese evergreen leaves, and in severe cases the spots cover the entire leaf.
Control method: when the above symptoms are found, promptly remove the diseased leaves and destroy them in a centralized way to reduce the source of the disease; then spray 65% zineb 500 times solution or 25% myclobutanil emulsifiable concentrate 800 times solution for control, and spraying 1-2 times every 10-15 days can be effective.
4. Anthracnose
When it comes to what diseases Chinese evergreen can get, anthracnose is indispensable. This disease mainly harms the leaves. At the beginning, several light yellow, dark brown or light gray small patches appear on the affected parts, and as time goes on, it will infect the stems and branches, seriously affecting the plant's growth.
Control method: when the above symptoms are found, promptly cut off the diseased leaves and burn them in a centralized way to reduce the source of the disease; in severe cases, spray 50% carbendazim 1000 times solution or 70% thiophanate-methyl 1000 times solution for preservation, and it can be effective after 2-3 times.
5. Brown spot disease
Besides the above pests and diseases, brown spot disease is also a disease commonly suffered by Chinese evergreen. This disease mainly harms the leaves, causing grass-yellow wet spots to appear on the leaf edges and leaf tips; in severe cases, the leaf spots expand in connected patches and become brown-yellow spots, the plant's growth is affected, and its ornamental value is reduced.
Control method: when the above symptoms are found, pesticide should be sprayed for control. The pesticide can be 50% carbendazim wettable powder 600 to 800 times solution, or 50% thiophanate-methyl, sulfur suspension 600 to 800 times solution, sprayed alternately 3 to 4 times, once every 7 to 8 days, with good control effect.
Regarding pest and disease control of Chinese evergreen, the editor has introduced this much. I believe everyone should know what to do when encountering pests or illness in Chinese evergreen again! In general, with just a little inattention, Chinese evergreen is easily invaded by pests and diseases, so everyone must care for it carefully; only in this way will pests not come looking for it. Finally, may everyone's Chinese evergreen grow beautifully~
What to do when dumb cane gets pests: control of 6 common pests and diseases of dumb cane
Coming home and looking at the broad, thick, spotted leaves of dumb cane, eye fatigue is relieved in an instant. But beautiful things need to be carefully cared for by us, and once it is grown improperly and dumb cane gets pests and becomes sick, its ornamental value will be seriously affected. So what to do when dumb cane gets pests? The following are 6 common pest and disease controls of dumb cane. Go in and take a look!
I. Dumb cane gets pests, spray with pesticide
During the growth of dumb cane, for various reasons, the plant will inevitably suffer pest damage. The main diseases include: leaf spot disease, brown spot disease, anthracnose and root rot; the main pests include: scale insects, red spider mites, etc. Once found, everyone should immediately spray pesticide for control. As for what pesticide to spray, let us continue reading below.
II. Pest and disease control of dumb cane
1. Scale insects
Scale insects are the most commonly appearing pests on dumb cane. They are relatively small, often gather in groups, and secrete wax, looking like a pile of white wax powder, which greatly damages the plant's ornamental value. This pest often gathers on branches and leaves, sucking plant sap to live, which causes dumb cane leaves to turn yellow, and in severe cases causes branches to wither or the whole plant to die.
Control method: when there are few scale insects, just pick them off with a wooden stick and crush them to death. When there are many pests, spray dichlorvos 1000-15000 times solution, or 50% malathion emulsion 1000 times solution, etc. for control.
2. Red spider mite
A mite-type arachnid pest, it is one of the common pests harming dumb cane. This pest often occurs when ventilation is poor, and it harms the top of the plant, causing the top of dumb cane to turn red-brown and have spider webs, affecting the plant's growth and development.
Control method: after finding the pest, it can be treated with Decis, or drugs such as spraying 25% anti-mite emulsifiable concentrate 800 times solution, 73% propargite 2000 times solution, etc. can be used.
3. Leaf spot disease
When the indoor temperature fluctuates greatly in a short period, or when watering too much during the dormant period, dumb cane is prone to leaf spot disease. When the disease occurs, many small brown spots appear on the dumb cane leaves, and in severe cases the spots cover the entire leaf.
Control method: promptly remove the diseased leaves and destroy them in a centralized way to reduce the source of the disease; during the disease period, spray 65% zineb 500 times solution or 25% myclobutanil emulsifiable concentrate 800 times solution for control, and spraying 1-2 times every 10-15 days can be effective.
4. Brown spot disease
One of the pests and diseases of dumb cane, it mainly harms the leaves. When the disease occurs, grass-yellow wet spots appear on the leaf edges and leaf tips; in severe cases, the leaf spots expand in connected patches and become brown-yellow spots, the plant's growth is affected, and its ornamental value is reduced.
Control method: when the above symptoms are found, pesticide should be sprayed for control. The pesticide can be 50% carbendazim wettable powder 600 to 800 times solution, or 50% thiophanate-methyl, sulfur suspension 600 to 800 times solution, sprayed alternately 3 to 4 times, once every 7 to 8 days, with good control effect.
5. Anthracnose
When it comes to what diseases dumb cane can get, anthracnose is indispensable. It mainly harms the fleshy stems, causing spots to appear on the stems. The spots formed by this disease are relatively large, 2-3 cm in diameter, some semicircular and some oval, brown in color, and in the later stage they turn grayish-white.
Control method: after finding that dumb cane has anthracnose, immediately cut off the diseased part, and apply copper oxychloride solvent once every 5 days; if the disease has not been present long, use 30% copper oxychloride combined with 70% mancozeb, apply once every ten days, and spray 2-3 times.
6. Root rot
During the growth of dumb cane, because of watering and other stable factors, novices easily encounter root rot in the plant. When the disease occurs, the dumb cane leaves begin to wither and die, and when storing the corms, the corms easily rot and become dry and hard.
Control method: when the above symptoms are found, if the condition is mild, spray 500 times zineb solution; if the rot is severe and the bulbs have seriously degenerated, just throw them away directly.
Summary: In order to appreciate the beauty of dumb cane, everyone should care for it strictly according to the cultivation methods of dumb cane. Of course, if pests and diseases appear, everyone need not worry; just follow the control methods above to solve them. Regarding pest and disease control of dumb cane, the editor has introduced this much, hoping to bring help to everyone.