Prevention and control of diseases and insect pests in Jianlan

1. White silk disease

Symptoms: White silk disease mostly occurs in the plum rain season, which mainly harms the rhizome of the plant, causing the root to rot and die. There will be white colonies on the surface of the soil, and the plants will gradually lodge and wither.

Solution: after the disease, we should change the soil in time, sprinkle lime, wash and cut off the diseased plants, disinfect them, pay attention to ventilation, control the amount of water, and the plants will recover slowly.

two。 Scale insect

Symptoms: the main pests of scale insect Jian Lan are mostly caused by high temperature, humidity and airtight environment. Scale insects will harm the branches of Jian Orchid, making the leaves yellow and the branches withering.

Solution: you can choose omethoate 1000 times liquid spray, or rinse with clean water, rinse repeatedly for two or three times.

Jianlan winter care methods and pest control methods are introduced so much, Jianlan lively and beautiful, why not lovable? Let's hurry up and raise a basin.

How should Jianlan be maintained and managed? what are the pest control skills of Jianlan?

Jianlan is used for family cultivation and belongs to a better variety. So do you know who is responsible for Jianlan maintenance and management? What pest control skills does Jianlan have? Today, the editor would like to talk about the knowledge of Jianlan breeding.

Maintenance and management

1. Controlling light and cooling Jianlan growth is suitable for the annual average temperature between 15-23 ℃, the summer temperature is hot, and 70-80% plastic shading net is used to cool down.

2. High temperature promotes the drop of high temperature caused by excessive light, we should increase the level and density of shade to promote cooling; in summer and autumn, there are strong light, muggy air and high temperature, so we should open doors and windows to let the orchid field air convection thoroughly and promote cooling. Sprinkle water to the passageway and orchid shelf and spray water to the indoor space, which can also promote cooling.

3. Moisturizing and ventilation in the orchid field should be regulated to the most reasonable state for the growth of orchids. To maintain air humidity, an advanced automatic humidifier can also spray water mist into the space, passageway and orchid frame. The maintenance of substrate humidity should be regulated according to light, humidity, ventilation and other conditions. Those cultivated with soil should be watered once every 2-4 days, insisting on "better dry than wet", and the time limit for watering should be adjusted to local conditions. Wild orchids are native to mountains and valleys, and their producing areas are open on all sides, but they are shaded by trees and grass, sometimes with gentle winds, and can grow in an environment with fresh air for a long time. Therefore, the orchid farm also needs to create these orchid growth conditions, and the orchid field should open more doors and windows to promote air convection.

4. Heat preservation and anti-freezing

Jianlan can only withstand temporary and intermittent low temperatures of-2 to-5 ℃ under protective conditions with shelter from wind and frost, so it should be kept warm in the greenhouse in winter and heating equipment can be adopted if possible.

5. Fertilization

Adopt "according to the orchid conditions, look at the seedling to determine the fertilizer, rather light than thick, timely thin application". That is, according to the orchid species, seedling potential, physiological characteristics, grasp the opportunity. Dry fertilizer: beef bone powder (4% nitrogen, 22.06% phosphorus), plant ash (1.04% phosphorus, 6.41% potassium), cake fertilizer (7% nitrogen, 1.32% phosphorus, 2.12% potassium) and fire-fired soil mixed fertilizer are used alternately with compound fertilizer not less than 4 times a year. Liquid fertilizer uses rotten organic matter fertilizer to filter dilute solution, urea, potassium dihydrogen phosphate or special flower fertilizer alternately as topdressing or extra-root fertilization, generally every 15 days, spraying leaves with clear water before and after spraying outside the root, flushing dust and liquid residue.

The fertilization time is: ① sprouting fertilizer (late spring and early summer): dry fertilizer once to twice, extra-root fertilization once every 10 days, mainly nitrogen and potassium fertilizer, promoting the emergence of aboveground stems and leaves, underground root expansion. ② development fertilizer (late summer and early autumn): new bud leaves elongate to promote new buds to be strong, mainly nitrogen, frequently applied thinly, potassium is mainly used to promote strong seedlings after the opening of new buds, and potassium dinitrogen phosphate is sprayed once a week. ③ to promote flower fertilizer: when the new shoot leaves no longer grow, it will be transferred to the flower bud differentiation stage, mainly phosphorus, dry fertilizer twice, extra-root fertilization once a week. ④ in late autumn and early winter, orchids from Cold Dew to the Beginning of Winter will turn to dormancy, dry fertilizer once, liquid fertilizer twice, foliar spraying once every 10 days, to ensure safe overwintering, containing paste to show, and improve the germination rate in the coming spring.

Disease prevention and cure

Anthrax, black spot and shell insects are common. The disease was sprayed with 500 times of 10% carbendazim wettable powder and the pests were sprayed with 1 500 times of 40% omethoate EC.

Control of Diseases and insect pests in flowering stage of Jian Orchid

Yangchun March, beautiful spring, flowers contend for Yan, orchid nursery a school of vitality: the orchid scape has grown more than 20 centimeters, the flowers are budding, however, the good times do not come, the good flowers are difficult to bloom, and the buds gradually shrink. It is not known that it has been infected with pests until it is cut open, and it is already covered with heart worms. In this regard, to take the following governance methods.

① will turn the orchid pot over, rinse the orchid root with tap water, especially re-wash the inner wall of the leaf bank around the Reed head; scrape off the dirt, soak it in 300x solution and carbendazim for 30 minutes (above the Reed head), then dry it in the shade.

Before re-potting the ② plant, the plant material and orchid pot must be disinfected at high temperature, and the infected leaves, withered heads and diseased roots should be cut off. After the orchid plant is put on the pot, the plant should be sprayed to eliminate diseases and insect pests. The first spray was made with 500-fold solution of litchi insecticide, propofol, methyl topiramate and carbendazim, and then every 10 days for 3 times in a row. When spraying, the bottom of the leaf should be sprayed evenly, especially the pseudo-bulb.

③ chooses a place to put it. Choose the best position in Orchid Field. Orchid pots receive direct sunlight before 08:30 (summer), transfer to the shade after 9 o'clock to bask in the "flower sun", and put in the shade after 12:00. At this time, before and after the left and right sides should be ventilated, the ground water reflux, increase humidity; then the breeze slowly, cool breeze, it is very beneficial to the growth of orchids.

This is what I know about Jianlan's feeding and management today. I hope it will be helpful for you to read this article. If you want to know more about orchid plants, please continue to follow our succulent flower beds. We will provide you with more related content for the first time!

How to control diseases and insect pests in Jianlan?

The following is the relevant knowledge summarized by the editor on the prevention and control of diseases and insect pests in Jianlan. I hope it can provide help to orchid lovers.

Yangchun March, beautiful spring, flowers contend for Yan, orchid nursery a school of vitality: the orchid scape has grown more than 20 centimeters, the flowers are budding, however, the good times do not come, the good flowers are difficult to bloom, and the buds gradually shrink. It is not known that it has been infected with pests until it is cut open, and it is already covered with heart worms. In this regard, the following governance methods are adopted.

First, turn the orchid basin upside down, rinse the orchid root with tap water, especially re-wash the inner wall of the leaf bank around the Reed head; scrape off the dirt and soak it with 300 times of the liquid Topurazine and carbendazim for 30 minutes (above the Reed head). Then dry on the basin.

Second, before the Jian orchid disease plant goes back to the pot, the plant material and the orchid basin must be disinfected at high temperature, and the infected leaves, withered heads and diseased roots should be cut off. After the orchid plant is put on the pot, the plant shall be sprayed to eliminate diseases and insect pests. The first spray was made with 500-fold solution of litchi insecticide, propofol, methyl topiramate and carbendazim, and then every 10 days for 3 times in a row. When spraying, the bottom of the leaf should be sprayed evenly, especially the pseudo-bulb.

Third, choose the place to put it. Choose the best position in Orchid Field. Orchid pots receive direct sunlight before 08:30 (summer), transfer to the shade after 9 o'clock to bask in the "flower sun", and put in the shade after 12:00. At this time, before and after the left and right sides should be ventilated, the ground water reflux, increase humidity; then the breeze slowly, cool breeze, it is very beneficial to the growth of orchids.

Jian Lan white silk disease

Most of them occur in the rainy season. Should pay attention to ventilation and light, basin soil drainage is good to prevent, after the disease can be removed with bacteria basin soil, sprinkled with pentachloronitrobenzene powder or lime can be.

Anthracnose of Jianlan

All the year round, the high temperature and rainy season is even more rampant. In addition to improving environmental conditions, 50% methyl topiramate wettable powder 800 Methyl thiophanate wettable powder can be sprayed once every 7-10 days, and then supplemented with 1% equivalent Bordeaux solution, once every semimonthly.

Jian orchid scale beetle

In the case of high temperature and humidity and poor air flow, reproduction is the fastest. Use the routine method to prevent and cure.

Jian Lan root rot

Nematodes are parasitic on the roots of orchids, causing root rot, poor growth of aboveground leaves, turning green and yellowing, and even causing plant wilting. Nematode damage caused a large number of wounds, but also caused the infection of other soil-borne bacteria, resulting in plant disease and accelerated plant death. The cultivation substrate should be disinfected and can be sterilized with 100 degrees steam to kill insect eggs. If the harm is serious, change the basin immediately, soak the diseased plant in the medicine solution for 20-30 minutes, fish it out to dry, and replant it with a new substrate.

The above is the relevant knowledge of the prevention and control of diseases and insect pests in Jianlan.