North Winter Disease Prevention and Control

'Green apple' bamboo grasshopper, also known as the round-leafed bamboo grasshopper, is a perennial grass plant of the genus Pterophyllum of the family Pterophyllus. Its green leaves are green, beautiful and full-bodied, and has a strong negative resistance. It can beautify the family room and office space. It can also be used for the decoration of various conferences and is favored by people.

In the greenhouses of northern China, round-leafed bamboo shoots have a high incidence in winter. Low temperature and high humidity are the environmental factors that can hardly be overcome in the winter in northern greenhouses, and they are also the main causes of the occurrence of bamboo grasshopper diseases. The common two main diseases are the following two types.

One is low-temperature freezing injury, and the other is that extremely cold temperatures cause frostbite in the leaves or freezing of whole plants. This extreme situation will hardly occur in production units. The other is that due to the fact that the winter night temperatures are mostly below 18°C, and even from 10°C to 15°C often occur, this is a common occurrence in North China's bamboo poles. The damage caused by the latter to the bamboo raft will not appear immediately. Its damage is recessive, but the damage caused is incalculable. The following leaves appear spots and oil spots and other spots appear on the edges of the leaves, resulting in poor sales. , sales delay and so on.

Second, anthrax disease, poor ventilation and light transmittance in winter greenhouses, high humidity, low temperature, easy to weaken the growth of plants, reduce disease resistance, these are easy to induce anthrax and other diseases.

The prevention and control methods for these two diseases are as follows: First, the management personnel should strengthen the control of temperature, the night temperature of 18°C ​​is necessary, and should reach 20°C to 22°C during the day; Second, seal and heat preservation measures should be carried out in greenhouses. At the same time, pay attention to proper ventilation at noon, and keep the optimum humidity at 65% to 75%. Third, maintain a good spacing between rows. The high density brings about a high incidence of disease, rather than a high benefit; Fourth, it cuts the disease in time. Leaves, isolation of diseased plants; Fifth, to strengthen the management of fertilizer and water, to prevent splashing the potted soil to the foliage when watering; Sixth, it is necessary to pay special attention to the roof dripping problem in winter, water droplets should be avoided to drop on the leaves; Seven is available smoke agent Prevention and treatment, such as chlorothalonil, chloramphenicol, procymidone, etc.

Anthocyanidins is a kind of water-soluble natural pigments widely existing in plants in nature. They are colored aglycone obtained from the hydrolysis of anthocyanins. Most of the main colorants in fruits, vegetables and flowers are related to them. Under the condition of different PH value of plant cell vacuoles, anthocyanidins make the petals colorful. The main functions about anthocyanidins are antioxidant and free radical scavenging function, nutritional fortifier in food and natural pigment.


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