Orchid leaf characteristics to judge the disease

Look at a little knowledge of Lanye's disease.

Symptom appearance of orchid leaf disease

1) the leaves are yellowed and grow normally:

It's too much light.

2) the leaves turn yellow and the new buds are smaller:

Excessive light, lack of nitrogen fertilizer and necessary humidity.

3) yellowing and shedding of old leaves:

Caused by normal aging or turning the basin.

4) rapid yellowing and shedding of old leaves:

Too much watering, too often, improper pot turning and planting.

5) the tip of the new leaf is scorched:

Excessive fertilization, planting materials are not clean.

6) the focal tips of new leaves and old plants are black:

Excessive dampness and heat in the basin, and there are rotten roots in the root system.

7) after the new buds were unearthed, they stopped growing:

There are rotten roots or unclean things next to the new bud, open the breeding wood around the new bud, remove the unclean matter and resume growth.

8) there are focal spots on the leaves, and there is no yellow on the periphery:

The scorching sun burns.

9) there is a dipping head at the end of the leaf:

The water temperature of watering is too high; the temperature is too high when watering; showers are caught in high temperatures in summer, etc.

10) New sprouts and bad hearts:

After watering and pouring into the bud core, the water can not be evaporated and absorbed, and the unclean reproductive wood in the basin produces leaf rot and so on.

11) there are spots and water-immersed edges on the leaves:

Excessive humidity, basin humidity and air humidity produce asphyxiation, accompanied by leaf rot bacteria. Poor ventilation and ventilation.

12) there are chloasma on the leaves:

Caused by heat at the root.

13) there are irregular maculae and necrotic mesophyll tissue on the leaves.

Viral disease, also known as "Balas".

14) there are small yellow spots on the leaves:

Caused by scale insects.

15) the leaf appears purple-black, and the back of the leaf is still green:

Caused by low temperature and frost. Lack of phosphate fertilizer can also occur.

16) Leaf dehydration, pseudocorm crepe:

The basin is caused by long-term over-drying and dehydration.

I think this is due to fat damage, which is characterized by the fact that the new seedlings grow better, but the old seedlings will start to turn yellow from the roots, especially if they are not strong at all, there will be more yellowing leaves.

This is also a fertilizer hazard. If this happens, water less if it is not serious. After a period of accomplishment, if it is serious, the planting material will be changed.

Introduction of common fungicides in orchids

1 product name to treat the nature of orchid disease dilution multiple

2 Chlorothalonil 75%WP leaf spot, blight, anthrax broad-spectrum, non-aspiration prevention before the onset of 800-1000 times liquid

3 methyl topiramate 70%WP leaf spot, flower rot, anthrax broad-spectrum antibacterial spray 1000-1500 times

4 carbendazim 50%WP internal spray of leaf blight, root rot and anthrax 800-1000 times

5 can kill 77%WP blight, root disease, leaf spot, copper agent, broad-spectrum long-term spray and root irrigation solution

6 Agricultural streptomycin 72% WP bacterial spray and root irrigation 500-800 times solution

7 medical streptomycin bacteria spray and root irrigation

8 potassium permanganate disinfectant chemical soaking 800-1000 times solution

9 Dysen zinc 80%WP anthracnose, spot disease touch and spot disease early stage spray 800-1000 times solution

10 mancozeb 70%WP anthrax, spot, blight broad-spectrum antibacterial spray 600800 times

11 enemies killed 2.55% EC aphids, leaf-eating caterpillars, stomach poison spray 2000-2500 times

12 speed culling 40% EC scale insects, leaf mites contact, stomach poison penetration, spray, root watering

13 disease Kirk virus disease infiltration, spray, root watering 800-1000 times solution

14 virus Bike virus disease permeated, sprayed and irrigated 600-800 times

15 Houttuynia cordata Thunb nutrition and sterilization double disinfection and sterilization

16 Dakenin broad-spectrum spray and 1000 times root irrigation solution

17 Chlorothalonil 75%WP leaf spot, blight, anthrax broad-spectrum, non-aspiration prevention before the onset of 800-1000 times liquid

18 Redomir mn-Zn 58%WP blight, root disease internal inhalation, drug spot spray, 80-1000 times solution of gonorrhea root

19 Baolian 10%WP internal inhalation and safety spray 1000-1200 times for all kinds of leaf spot

20th century high 10%WP leaf spot, anthrax internal suction spray 3000-60000 times

21 Pulic 66.5% blight, rot bacteriostasis, stimulate crop growth spray, soil treatment 600-800 times

22 Bao Gong 25%WP leaf spot, blight, anthrax broad spectrum, inhibit some fungi spray 800-1000 times

23 50%WP blight, Fusarium oxysporum, rot, root rot, broad spectrum of sclerotia, spraying or root irrigation 1000 times in the early stage of contact.

24 soil bacteria disinfect 70%WP Fusarium, internal absorption of Pythium, soil disinfection and root irrigation, spray 1500-2000 times solution

25 sclerotiorum net 40%WP sclerotiorum, leaf blight contact, infiltration, residual long gonorrhea root or spray 800-1000 times solution

26 75%WP root disease, stem rot, anthrax internal absorption and infiltration of soil treatment

27 the sclerotia of 50%WP, root rot and anthrax were absorbed internally, and the drug spots were left 800-1000 times after application.

28 25%WP rust internal inhalation spray 1500 times solution

29 Zhanling 1.5%WP virus disease suppresses virus and promotes plant growth spray

30 Yekuning 20%WP bacterial disease internal absorption, long-term spray 1000 times solution

31 High lipid membrane 27% emulsion fungi, bacteria, protection of plants, isolation of bacteria spray, environmental protection drugs

32 50%WP decay, spots, anthrax broad-spectrum antibacterial spray, soil application of 800-1000 times solution

33 benzoate 50%WP leaf spot, Fusarium oxysporum broad-spectrum antibacterial spray 1000-1200 times

34 Sukeling 50%WP sclerotia, root rot, flower rot internal absorption, easy to produce antibacterial spray, root watering 1500-2000 times solution

35 germicidal alum 64%WP stem rot contact, internal absorption, easy to produce resistance spray

36 Ethophosphorus aluminum 80%wp blight, downy mildew internal suction, upper and lower conduction spray, root irrigation

37 Weixiu Ling 20% EC rust internal spray

Description: 1: the drug is usually used once every 7 to 10 days, and it can also be adjusted according to different conditions; 2: carbendazim, carbendazim and methyl topiramate can not be used alternately.

3: copper preparation, alkaline drug and methyl topiramate can not be used at the same time; 4: the best plant material: large grain gold stone and small grain immortal soil or Qingchengshan black fairy soil and Huayilan soil.

Further introduction of Bailavirus (BLS)

Orchid virus disease, also known as Bayas disease, its pathogen is not bacteria, nor fungi, is a virus caused by great harm and difficult to cure the disease, known as orchid "AIDS", "cancer", it is not only contagious but also hereditary, and it is still unable to prevent and cure, once infected, the whole piece of orchid will suffer a devastating loss. When I first entered the orchid world ten years ago, I encountered such a disaster. In this game with the disaster, I found a piece of medical Radix Isatidis to spray leaves and water the orchid to cure the virus disease of orchids. An effective way has been explored for the prevention and control of orchid diseases and insect pests. Here is a brief introduction to you Lanyou for reference.

In the mid-1990s, I began to learn to raise orchids for about half a year. On the new leaves that bought a pot of snow, I found several milky white spots, the boundary of which was like a water stain formed by the diffusion of water droplets into absorbent paper. Matt is slightly bright, and a similar spot appears on the leaves of two small buds ten centimeters high. At that time, as soon as I knew it was a disease, I mistakenly thought that the orchid seedlings had mutated. I was really happy for a while and gave preferential treatment management such as key fertilization, just because the growth of the orchid seedlings was getting worse and worse, the water color faded, the spots were sunken, and the positive and negative sides of the patches were grayish green and transparent, and the plaques were not embellished with different colors. I was held in a place with strong light, showing dull folds and atrophy. It was only then that I realized that it might be caused by the disease, so I sprayed leaves every three days with pesticides such as chlorothalonil, carbendazim, Keshuda, Shibao, and so on. After spraying more than ten times, there was no improvement, but the orchid leaves shrank even more. it took half a year for the big snow in the rectifier basin to gradually wither away from the old and the young.

What is more serious is that soon after Daxue, which died of the disease in the basin, was placed on the new leaves of more than a dozen pots of snow, lotus petals, spring swords, and vegetarian tiger orchids, the disease spots appeared one after another, indicating that the disease had been infected. If the disease is not prevented in time, orchids bought for tens of thousands of yuan will be in danger of spoiling. In order to understand the disease and prescribe the right medicine, we actively consulted experienced old orchid friends. Under their guidance, we confirmed that the orchid had a viral disease. The pesticides used in the past were only effective against orchid diseases caused by bacteria or fungi, but had no effect on viral diseases. However, we are not sure what drugs can be used to prevent and cure the disease. under the psychological guidance of turning to the doctor randomly in order to treat the disease, we have used viretin and aspirin to spray leaves seven or eight times, but there is still no improvement. After extensive reference, I finally saw Mr. Xu Dong's suggestion of "try two flavors of Radix Isatidis, Flos Lonicerae, Guanzhong, Huang Cen, Zhi Zi, Yi Xi, etc." in the book "A hundred questions about domestic Orchids". I think these herbal medicines are effective drugs for treating colds, myocarditis and meningitis caused by virus infection. Used to prevent and cure orchid virus disease may be effective, and there are ready-made Radix Isatidis tablets "sugar-coated tablets are not easy, so do not choose". The Radix Isatidis tablets were purchased and put into the ratio of 100 ml water to 2 tablets to make a basin of Radix Isatidis solution. The upper part of the clear liquid was loaded into a sprayer to thoroughly spray the leaves of the whole orchid plant; the rest mixed with residue was taken to pour 100-200 ml of roots into the diseased orchid pot. So once every three days, a total of seven times. After that, it was changed to once a week and carried out three more times. It has been carried out ten times, at this time, the miracle finally appeared, and the disease spot on the orchid leaf in the orchid shed gradually faded. Soon after the haggard leaf color and gradually turned green, and the growth is exuberant, the new buds grow well, until now it has been seven or eight years, orchids have not been found to be infected with virus disease.

The above successful examples of prevention and treatment of orchid virus disease prove that medical Radix Isatidis can effectively cure orchid virus disease. "AIDS" and "cancer" of orchids are no longer incurable diseases. If any orchid friend's orchid plant contracted this disease, please give it a try!

Although Bellas virus is an incurable disease, it is not absolutely incurable. Experts and Yilan growers from various regions have made some progress in the treatment of Bayas disease. Some Lanyou have achieved effective control of the virus after several years of treatment, which can be said to be a success. The methods are summarized as follows:

First, build up a strong physique. Put the diseased orchid in the place of natural wind, adjust the light temperature and humidity, create good ecological conditions, and suitable for fertilizer supply and spraying, grow strong plants, and improve the ability of anti-virus.

Second, drug treatment: 1, finished pesticide virus, Bike 500 times liquid as effective medicine, adding 250 times solution of edible rice vinegar with strong osmotic function to introduce medicine directly to the disease department; 2, applying heat-clearing and detoxifying traditional Chinese medicine: Radix Isatidis, Flos Lonicerae, Scutellaria baicalensis, Yi Jiexi, Zhizi, Qiye and one flower, etc., choose the combination of 3rel and 5 clocks, and use alternately every month. First, use the leaching solution as the shearing liquid, and finally use the residue to sprinkle the solution with 10-100x liquid; 3. Spray 1000 times of the analgesic aspirin once a season, spraying and spraying both the above ground part and the underground part, omni-directional treatment of spraying once every 7 days, once every 10 words for 15 days, and then once a month or once a month for a year to consolidate the effect.

Third, support the upright and dispel evil, gradually increase the amount of light, more natural wind, more shower dew, normal fertilization, once every half a year, in line with 2 trace element fertilizer and plant biotics, spray medium concentration foliar fertilizer once a month, such as plant power 2003, Gaoli, Gaole, Ashi brand foliar fertilizer.

If we make unremitting efforts in this way, we can achieve a short-term cure effect, or at least control the spread.