What to do if there are white spots on orchid leaves, what is the disease of white spots on orchid l

It may be caused by the damage of "orchid scale insects", which do not move when harming, just like the dander on the ambush, which is the most serious insect pest of orchids, and the reproduction speed and harm are extremely large, so it needs to be prevented and controlled as soon as possible. Generally, it is better to spray special pesticides, such as "chlorpyrifos", "chlorpyrifos and machine emulsifiable concentrate", "Guoguang scale must die", etc., It can also be manually brushed or scraped, but it should be operated carefully to avoid damage to the orchid leaves!

There are many kinds of scale insects, including yellow, pink, red and black spots. Scale insects are extremely stubborn and prone to occur by adsorbing on orchid leaves and sucking chlorophyll for a living. After the occurrence of scale insect infestation, even if it is eliminated, it will leave white spots and yellow spots on the green orchid leaves, and in severe cases, the whole orchid leaves and even the roots of the leaves will become white and yellow residues, and the orchid will grow at one time and can never be restored to its original state.

The reason for the breeding of scale insects is that the water on the pot is too heavy, and the planting site is not ventilated or not well ventilated.

Spider mites are small mollusks. It mainly relies on chlorophyll to survive, once the lotus petal orchid is invaded, the entire leaf surface gradually loses chlorophyll, and small white spots will also appear, which seriously damages the growth of the orchid plant. This pest is highly fertile, and when it occurs, it gathers in groups on the back of the leaves or on the leaves to suck nutrients.

The cause of spider mites is that the potting soil is too dry and poorly ventilated.

Thrips are also a pest that harms orchid leaves. They also feed on the epidermal tissue of orchid leaves, which can also leave small white spots on the leaf surface that cannot be recovered for life. The cause of this pest is that the orchid plant was originally infected, and the cultivation area was not ventilated.

If there are white spots on the leaves of the orchid, it may be powdery mildew, you can wipe it clean with a wet paper towel first, and then spray him with some carbendazim or some diluted alcohol. Then put it in a ventilated place.

There are two conditions that will produce white spots: 1. It is the wax secreted by the plant itself 2. White spot disease is produced after being infected.

There are six ways to do this:

1. Place in a windy place. If there is a lot of white substance on the leaves of the orchid, it is caused by the lack of ventilation in the environment, so it should be placed in a windy place, so that the orchid can grow better, and it can also make the orchid grow more lush, and it is very important to open the window often for ventilation.

2. Remove with a toothpick. Prepare a toothpick and use a toothpick to remove the white substance from the orchid, you need to be more patient, and remove all the white spots in time, which can make the orchid look better and make the orchid leaves more beautiful.

3. Brush off with a toothbrush. Brushing the white spots off the orchid leaves with a toothbrush can make the leaves look greener and more beautiful. Therefore, treat it with a toothbrush in time, so that the orchid can grow better.

4. Spray water regularly. If there are white spots on the leaf surface of the orchid, it means that the leaves have insects and need to be treated in time, so that the orchid can grow better and the orchid grow healthier. Spray the leaves regularly to keep them moist and make the orchid grow better.

5. Use of drugs. White spots on the leaves of orchids indicate that scale insects have grown and can be removed with pesticides.

6. Water in time and get more sunlight. Orchids need sunlight and water in the daily breeding process, so try not to plant in a place where there is a lack of sunlight, put orchids in a sunny place, and water them in time.

Summary. The leaves of the orchid have white spots, if it is caused by the scale insect, pinch it off directly when the number is small, and make a homemade solution to deal with it, or you can set up the orchid plant, and then use mosquito incense to smoke it, when the scale insect is more serious, you can buy the cocoon Bizhi, cocoon to spray, and replace the soil once after spraying. If it is caused by powdery mildew, it is necessary to remove the severely infected leaves, strengthen ventilation, and spray carbendazim, chlorothalonil, methyl tobuzin and other fungicidal drugs.

The leaves of the orchid have white spots, if it is caused by the scale insect, pinch it off directly when the number is small, and make a homemade solution to deal with it, or you can set up the orchid plant, and then use mosquito incense to smoke it, when the scale insect is more serious, you can buy the cocoon Bizhi, cocoon to spray, and replace the soil once after spraying. If it is caused by powdery mildew, it is necessary to remove the severely infected leaves, strengthen ventilation, and spray carbendazim, chlorothalonil, methyl tobuzin and other fungicidal drugs.

You can brush it off with a toothpick or toothbrush.

The tip of the leaf has a white edge called a silver mouth.

The white edge of the leaf is a kind of leaf art, only the tip of the leaf has a white edge called the silver mouth, more than one-third of the leaf length with a white edge is called the silver edge, the whole leaf is all white with a white edge called the silver wheel, all varieties of orchids may appear this kind of edge art. Such as Chunlan silver mouth, Huilan overturning wheel, silver edge Jianlan and so on.

1. Jianlan, a terrestrial plant. Leaves 2-6 clustered, thinly leathery, band-shaped, soft, curved and drooping, 30-50 cm long, wide, slightly shiny, apex acuminate, margins inconspicuously obtuse. The flowers are erect, 20-35 cm high, and shorter than the leaves.

There are usually 4-7 flowers, up to 13 flowers.

The upper part of the flower bract is less than 1 cm long in the middle of the inflorescence axis, and the lowest one is up; The flowers are light yellow-green, with a clear aroma; sepals narrow, round-lanceolate, about 3 cm long, 5-7 mm wide, light green, green at the apex, pale at the base, with 5 darker veins; The petals are short, close to each other, and light in color with purple markings.

The labial flap is inconspicuous with 3 lobes, the lateral lobes are light yellowish-brown, and the labial disc ** has 2 half-moon-shaped folds, white, the middle lobes are reversed, and the pale yellow is with purplish-red spots. Flowering period is from July to October.

2. Chunlan, a terrestrial plant. Pseudobulb sets to form clumps. Leaves 4-6 clustered, narrowly banded, 20-40 cm long, 6-11 mm wide, apex acute, margins finely serrate.

The flowers are erect, much shorter than the leaves, and are sheathed by 4-5 pieces; bracts long and broad, longer than the ovary with peduncles; The flowers are solitary, less than 2 flowers, 4-5cm in diameter, light yellow-green, with a clear fragrance.

Sepals nearly equal. narrowly oblong, 6-8 mm long and left and right wide, apex acutely pointed, midrib base with purple-brown stripes; petals ovate-lanceolate, slightly shorter than sepals; The labial flap is inconspicuously 3-lobed, shorter than the petal, light yellow with purplish-brown spots, the apex is reversed, and the labial disc ** has 2 folds from base to middle. Flowering period is from February to March.

3. Orchid, a terrestrial plant. Leaves 7-9 clustered, erect, 25-80 cm long, about 1 cm wide, often folded in the middle and lower parts, apex acute, basal joints indistinct, margins finely serrate; It has distinctly transparent veins. Flowers erect, 30-80 cm high, greenish-white or purplish-brown, sheathed by several elongates; The racemes have more than 6-12 flowers.

The peduncle is often shorter than the peduncle, and the bottom one is longer, up to 3 cm long; flowers pale yellow-green; sepals nearly equal, narrowly lanceolate, 3-4 cm long, 6-8 mm wide, apex acute; petals slightly smaller than sepals; Labial lobes indistinctly 3-lobed, shorter than sepals, lateral lobes erect, with purple spots, middle lobes elliptic, with transparent papilloid hairs on top, marginal hairs, with white purplish-red spots, labial disc with 2 slightly curved folds from base to middle. Flowering period is from April to May.

Orchid leaves have white spots, which need to be sprayed with dimethoate solution in time for effective control. When caring for orchids, avoid strong direct sunlight and ensure proper sunlight scattering. Water the orchids in time, do a good job of water replenishment, and water thoroughly every time.

Prune orchids to enhance air circulation and avoid the growth of bacteria and insect pests.

The white spots on the leaves of the orchid are due to the fact that the plant has suffered from scale insects. If not controlled in time, the leaves of the orchid will be quickly eroded, and the leaves will turn yellow and fall off. It is necessary to spray dimethoate solution on damaged leaves in time, or wipe the surface of the leaves after dilution with vinegar for effective prevention and control.

Orchids like a semi-shady environment, can not be directly exposed to direct sunlight, the environment is dark, orchids will migrate, leaf growth is slow. Orchids need to be maintained in a ventilated and bright place to ensure sufficient sunlight scattering, and the light is strong in summer, so it is necessary to do a good job of proper shade protection to avoid sunburn on the leaves.

Orchids like a moist environment and need to be watered in time to replenish water. Water the orchid thoroughly every time to avoid root rot caused by stagnant water. In summer, the temperature is high, you can water 1 time a day to ensure that the soil is in a moist state, and there is more rain in the rainy season, so do a good job of soil drainage.

Orchids have dense branches and leaves, and during the growth process, they need to be pruned in time. Prune some dead branches and rotten leaves of orchids in time to reduce excess nutrient consumption. Orchids are thinned to effectively enhance air circulation and avoid the breeding of bacteria and insect pests.

Ensure air circulation and promote the continuous growth of orchids.