In summer, the highest temperature in Beijing reached 35°C, far exceeding the upper limit of lily temperature of 25°C. A survey of lilies production in the suburbs of Beijing has found that the lower leaves of the lily plants are yellowing, root rot, and the overall growth bias is serious. The author summarizes the management techniques of Lily security over the summer planted in the outskirts of Beijing as follows: Variety selection Firstly, the OT hybrid lily varieties with high temperature resistance, high humidity and strong disease resistance were selected, and then the oriental hybrid lily varieties were selected. 'Sorbonne' is more resistant to heat, humidity and disease than 'Siberian'. Environmental regulation 1. Temperature: Lily cultivation in the summer, reducing the temperature and ground temperature is the focus of production management. In the production, shade nets and other measures are mainly used to reduce the temperature. The use of shade net should pay attention: do not close to the greenhouse skeleton cover, in order to facilitate the ventilation inside and outside the greenhouse; grasp the cover time, if the shade net is covered for 24 hours, due to low light can cause plant growth, chlorosis, disease, bud and quality decline Phenomenon, so it is necessary to flexibly grasp the uncovering time according to the weather conditions, such as sunny days from 10 am to 16 pm, cover, cloudy does not cover. In order to reduce the ground temperature, cold water is mainly used as irrigation water in combination with each watering and fertilization. The time is about 11 am. 2. Illumination: In summer, the light intensity is relatively high. Shading nets are used for shading to ensure normal plant growth. OT hybrid lily shade 50%, Oriental hybrid lily shade 75% to 90%. 3. Humidity: Summer plants and soil moisture evaporate in large quantities and require timely replenishment of water, but they cannot be watered too much, resulting in a high temperature and humidity environment in which soil water, root rot, and soil-borne diseases occur and spread. Watering should follow the principle of seeing the soil dry and wet, while trying to avoid splashing irrigation water, so as not to spread the disease. Fertilizer With the increase of temperature, the root activity of the plant decreased. At this stage, the plant is in the budding stage, and the amount of top dressing should be increased. At the same time, foliar spray fertilizer should be used to supplement nutrients, and potassium fertilizer should be used to promote growth. Bud growth, improve plant resistance. Apply fertilizer 15-15-15 once every 7-10 days, 15-15-15 compound fertilizer, and 15 grams of fertilizer per square meter. Spray 0.1% high calcium potassium fertilizer every 7 to 10 days. Pest Control High-temperature and high-humidity weather is conducive to the occurrence of soil-borne diseases. Common pests and diseases include root rot, stem rot, gray mold and aphids. Severe pests and diseases can lead to root rot, yellow leaves falling off, buds disappearing and stem lodging. Lily pests and diseases should be mainly prevention, careful observation of plant growth and changes, so that timely detection and timely treatment. Cultivation and management pay attention to reasonable regulation of temperature and humidity, strengthen air circulation, increase matrix permeability and drainage. If pests and diseases occur, they should be used every 7 to 10 days to prevent the occurrence of fungi with 400 to 500 times the amount of thiram, and 500 grams of schizophrenia should be used to control the fungus. The quick-drying 1000 times solution should be sprayed to control the gray mold and the imidacloprid should be sprayed 1500 times. Control locusts and so on. Surgical Packs,Sterile Surgical Packs,Disposable Surgical Packs,Medical Disposable Surgical Packs Xinxiang Huaxi Sanitary Materials Co., Ltd. , https://www.huaximedical.com