Sword orchid corm rot

[distribution and damage] corm rot is an important disease in sword orchid, which occurs to varying degrees in different places. It is reported that the sword orchid of flower growers in various flower beds and suburbs of Guangzhou is more common, and the damaged bulbs, leaves and leaf sheaths rot and die.

[symptoms] the disease mainly occurred in the lower tissue of the plant. The yellow to dark brown sunken spot of 4~6iTlrn appeared in the susceptible corm, and the edge was slightly raised and ulcerated. After the injury of the leaf base, there are often a few obvious black spots; the leaf sheath infection appears dark brown water stains; after the disease, the leaves yellowing and wilting. When the environment is dry, the disease part decays and dries up; under humid conditions, the disease tissue softens and dissolves, sometimes bacterial pus overflows, and finally only the fibers of vascular bundle tissue are left. at this time, the stem is easy to be broken.

[pathogen and pathogenesis] the pathogen of stem rot of sword orchid is P.marginata (Mcculloch) Stapp of Pseudomonas. Pathogenic bacteria live in the soil attached to diseased corm residues, and infect and spread in suitable environment. Some underground pests such as weevil, mole cricket and kowtow beetle not only cause root wounds, but also can carry germs to invade and expand the damage. High temperature, high humidity and Rain Water can aggravate the degree of the disease, which is conducive to the epidemic and spread of the disease. The pathogen can also infect the corms of Gladiolus.

[prevention and control methods]

The main results are as follows: (1) optimize the cultivation site and strengthen the management of fertilizer and water. To avoid continuous cropping in the disease area, it is best to disinfect the soil with quicklime or formaldehyde; apply plant ash and phosphate fertilizer as base fertilizer to eliminate stagnant water in the nursery in time.

(2) seed ball treatment. The disease-free bulbs were selected and disinfected with 1000 times potassium permanganate solution and planted; the harvested bulbs should be strictly selected to eliminate the diseased balls.

(3) to remove the source of infection. When diseased plants are found, they should be eradicated and burned in time, and the adjacent soil should be disinfected.

A complete collection of matters needing attention in the culture of sword orchid

Do you know the disease and pest control of sword orchid? Sword orchid culture methods and points for attention: sword orchid, also known as "gladiolus" and "ten brocade", gladiolus of Iridaceae, perennial herbaceous flower, its bulb is actually a bulb formed by the expansion of the base of the stem, covered by yellowish-brown fiber, the plant is 1 meter high, the stem is sturdy and erect, the leaves are very hard, similar to Baozhu, 30-80 cm long, the flower stem grows alone, and the flower stem is naturally extracted from the leaves. 8-20 flowers gather together, arranged in two rows, and the Corolla expands into a funnel. Sword orchid is now widely cultivated, it likes plenty of light, warm and humid climate, afraid of cold and cool, suitable for growing in well-drained sandy soil. The following is a detailed introduction to how to raise the sword orchid: 1, the environmental requirements of sword orchid culture temperature requirements: the lowest temperature for the growth of sword orchid is 3 ℃, when the temperature is lower than 3 ℃, the plant growth and development will be inhibited, showing that the plant growth, flower bud differentiation stops, and the developing flower buds also stop growing. The optimum temperature for the growth of sword orchid is 20: 25 ℃ in the daytime and 10: 15 ℃ at night. In the optimum temperature range, the stem buds begin to grow and the roots germinate, which is very beneficial to the development of flower buds. Lighting requirements: sword orchid is a long sunshine plant, in the process of its growth, it needs long light. Lack of light can lead to... "more 2. Fertilizer and water management of sword orchid culture after the cultivation of sword orchid bulbs, the germination of filamentous roots and the extraction of main buds all require sufficient moisture in the soil around the bulbs, so it is best to water the soil before planting. After planting, if the soil is too dry, replenish water immediately, and sometimes mulch to maintain soil moisture. The lack of soil moisture will greatly delay the germination of corms and seriously affect the emergence rate. After 2 leaves were grown, the rotten organic fertilizer was applied once every 15 days to promote the growth of stems and leaves. Do not apply when the stems and leaves are elongated and give birth to buds. "more 3, sword orchid cultivation pot conservation (1) selection of pots: generally choose plain fired pottery pots or plastic pots, with porous pots as traitors, shallow pots should be used for breathability, and the height of the pots should be less than the diameter of the pots. (2) selection of culture medium: sword orchid is a typical epiphytic orchid, its root system is well developed, and the cultivation medium must have. "more 4. The reproduction method of sword orchid culture is mainly divided ball propagation, the method is from April to May will be fully developed ball (diameter about 5cm) planted in the seedbed, plant distance 15cm, covering soil 6-lOcm, compaction and watering cultivation, July to August can blossom, about 100-120 days. It can also be planted every 10 days from the middle of April to the end of July, and there will be flowers continuously from July to October. After flowering, the underground seed bulb dried up, and three new bulbs and several small bulbs were formed above the mother ball. The bulb (bulb) of diameter 2cm will continue to be planted in the seedling bed in spring to develop into a large bulb for 2-3 years. In order to speed up the speed of reproduction, we can also use. "more 5. Precautions for sword orchid culture (1) fluorescent lamps must be used to fill the light when producing cut flowers in the greenhouse, increasing the light time to more than 14 hours a day. Sword orchid bogey continuous cropping, can not be planted in a field year after year, otherwise the bulb will become smaller year by year, each flower branch will have less flowers, should be replanted at intervals of 3-4 years; the soil must be changed every year in greenhouse production. (2) after planting in spring, you should often irrigate. Once you suffer from drought, the leaf tip will be withered and yellow, and you can not be affected by drought, at least every week in the rainless season. More 6. Disease and pest control of sword orchid culture (1) the disease of sword orchid corm rot mainly occurs in the lower tissue of the plant. The susceptible corm showed a sunken spot with 4-6mm yellow to dark brown, and the edge was slightly raised and ulcerated. After the injury of the leaf base, there are often a few obvious black spots; the leaf sheath infection appears dark brown water stains; after the disease, the leaves yellowing and wilting. When the environment is dry, the disease part decays and dries up; under humid conditions, the disease tissue softens and dissolves, sometimes bacterial pus overflows, and finally only the fibers of vascular bundle tissue are left. at this time, the stem is easy to be broken. Prevention and treatment:. "more culture methods and matters needing attention of rich trees at the head of Daquan Hongyun, the culture methods and matters needing attention of Daquan dripping Guanyin, the culture methods and matters needing attention of Daquan Phalaenopsis, the culture methods and matters needing attention of Daquan Jasper and matters needing attention, the culture methods and matters needing attention of Daquan rubber tree The Culture methods and points for attention of Fugui Bamboo in Daquan

The breeding method and precautions of tiger skin sword orchid it is a good choice to raise a tiger skin sword orchid at home. Tiger skin sword orchid, also known as tiger tail orchid, has erect leaves with gray-white and dark green tiger-tail-shaped stripes, resolute posture, strange and interesting; it has many varieties, great changes in plant shape and leaf color, exquisite and chic; it has a strong ability to adapt to the environment, and is a kind of indomitable plant. Phnom Penh tiger skin orchid belongs to the genus Polygonaceae, which is one of more than 60 species of tiger skin orchid with high ornamental value and is distributed in both tropics and subtropics. The following is the editor of the net to talk in detail about the breeding methods and matters needing attention of tiger skin sword orchid.

Culture methods and matters needing attention of tiger skin sword orchid

Ecological habits: light-loving long-day plants, winter cultivation cloudy days to increase light, afraid of cold. The suitable growth temperature is 20-25 ℃ in daytime and 10-15 ℃ at night. Through the dormant corms, the bulbs germinated at 4-5 ℃, and the plants froze to death when cultivated at 0 ℃ in winter. Do not tolerate waterlogging and avoid stagnant water in the cultivated land. For the sandy loam with good drainage and fertile soil, the pH value of 5.6-6.5 is better.

The main diseases are:

a. Penicillium rot, harvest and transportation, try not to hurt the seed bulb; soak in 2% potassium permanganate solution before planting: hour; pull out the diseased plant at any time during the growth process.

b. For dry rot, the disease-free mother ball should be selected when planting, and the diseased plant should be pulled out in time in the process of growth.

C. "blind flower" is a physiological disease, which mostly occurs in protected cultivation in winter. The method of prevention is to ensure suitable temperature and light, and select varieties that are resistant to low temperature and short sunshine.

The main pest is double-line mucilophilic slug, which can be sprayed with lime water and ammonia water; sprinkle lime powder around the garden to prevent it from entering; artificial culling.

Soil.

Tiger skin orchid soil needs loose, strong air permeability, so when preparing soil for tiger skin orchid, we must pay attention to the rotten leaves of 2 big 3, plus 1 big 3 garden soil, and keep in mind that the soil must be loose and breathable, otherwise the water will not evaporate easily and lead to rotting of the rhizome. It can also be mixed with 3 parts of fertile garden soil and 1 part of cinder, and then add a small amount of bean cake or chicken manure as base fertilizer.

Reproduction

It can be propagated by ramet and cuttage. All varieties of tiger skin orchid can be divided into plants, generally combined with changing pots in spring, the method is to cut the overgrown leaves into several clumps, each with leaves, but also a section of rhizome and sucking buds, which can be planted in the pot respectively.

Yellow rimmed or silver-veined varieties of tiger skin orchid use cutting method, when the temperature is above 15 ℃, the practice is to take leaves 5-10 cm long, slightly dry after cutting into the sand, cutting can not be reversed, cutting after spraying new high-fat film, on the plant surface, can prevent bacteria infection, improve the ability to resist natural disasters, improve the intensity of photosynthesis, pay attention to maintain a certain humidity, after a month can take root.

Temperature.

Tiger skin orchid has a high requirement for temperature. The suitable temperature for its growth is 20-30 ℃, and it stops growing when it is below 13 ℃. The lowest temperature in winter should not be lower than 10 ℃, otherwise the base of the plant will rot and the whole plant will die.

Humidity

During the growing period, the tiger skin orchid should be watered rather than wet. When new plants sprout at the root neck in spring, they should be watered properly to keep the basin soil moist, and do not let water accumulate in the basin in the rainy season. Usually, clean water can be used to scrub the foliar dust to keep the leaves clean and bright.

Generally speaking, if the soil is loose, it is watered twice a week; in winter, it is colder and only needs to be watered once.

Fertilizer

Tiger skin orchid does not have high requirements for fertilizer. 15% cake fertilizer and water can be applied every half a month in the growing season. Spraying Zhuangtuanling can make plant stems stout, leaves thick, leaves fresh and tender, and plants luxuriant. In the peak growth period, fertilizer can be applied once or twice a month, and the amount of fertilizer should be less; if only nitrogen fertilizer is applied for a long time, the markings on the leaves will become dim, so compound fertilizer is generally used. You can also evenly bury 3 holes of cooked soybeans in the soil at the edge of the basin, with 10 grains in each hole, be careful not to come into contact with the roots, and stop fertilizing from November to March of the following year.

Disease and pest

The common diseases of tiger skin orchid are leaf spot and anthracnose, which can be treated by spraying more than 50% carbendazim; common pests are harmful to weevil, and 1000 times of fenitrothion EC can be used to kill them.

Adult tiger skin orchid can blossom every year, and fragrance, but mainly to observe the leaves. This kind of plant is drought-resistant, moisture-resistant, shade-resistant, can adapt to a variety of harsh environment, suitable for garden beautification or potted, for advanced flower indoor plants, very suitable for decorating living room, study lamp place.

According to experts, tiger skin orchid can absorb more than 80% of indoor harmful gases, especially for formaldehyde, especially in newly renovated houses, and tiger skin orchid can also protect against radiation. The above tiger skin orchid culture methods and matters needing attention for your reference!