In the winter and spring season, the use of aerosols in greenhouses to prevent and treat diseases has its own unique effects, and its control effect is significantly better than spray, dusting and other spraying methods, especially in the rainy days or diseases during the epidemic control effect is more obvious. However, it must be used correctly in production practice to achieve good results. First, the characteristics of aerosols. The use of smoke agents for smoke prevention and control, no equipment, easy to use, save time and labor, the operator can ignite the smoke agent to leave. The smoke of the smoke agent can pervade all corners of the shed. The disinfection and sterilization effects are thorough and uniform, and generally do not cause disease resistance, avoiding the waste of conventional spray pesticides. Second, the correct choice of aerosol formulations. During the prevention and treatment, suitable aerosols should be selected according to different diseases. For example, before the colonization of the greenhouse, chlorothalonil smoke may be used for the initial control. When tomato and cucumber in the greenhouse occur leafy mildew, it can be controlled by quick-kering smoke agent. If multiple diseases occur at the same time, compound smoke agent is used for prevention and control. At present, sulfur compounds, chlorothalonil and xanthosine are the three types of smoke agents that are suitable for production. Sulfasulfuron is mainly used to control gray mold. Sulfur and chlorothalonil have different degrees of effect on various diseases. Sulfur is used to control powdery mildew, and chlorothalonil is more effective for downy mildew. Third, the correct use of methods 1, conditions of use: the smoke agent is the use of smoke as a carrier to achieve the purpose of spraying, so before using the smoke agent in the greenhouse to check the good shed, make up the loopholes, so that the shed face closed tight, the effect of prevention and control it is good. 2. Medication time: The smoke agent is a protective bactericide and has no systemic effect. Therefore, it must be used at the early stage or before the onset of the disease. It is advisable to use the smoke agent after covering the grass curtain in the evening, and it is better to use the smoke agent to ignite the disease on cloudy days and snow evenings. This is because under the sunlight, the surface temperature of the plants is the same as the temperature of the smoke particles, and the smoke is not easy to deposit and affect the efficacy. 3. Method of application 1 The determination of the discharge point: The space in the shed is relatively large, and all kinds of smoke agents with active ingredients can be used. The content of active components of the smoke agent is relatively low (10-30%), and the number of burning points can be less, and 3-5 points can be set for each acre. The content of active ingredients of the smoke agent is high. In order to prevent the occurrence of phytotoxicity due to long-term high-level smoke fumigation in the vicinity of the burning point, the burning point per acre should be increased to 5 or more. For dwarf sheds, smokers with a low content of active ingredients should be used. The discharge point can be appropriately increased, generally 7-10 per mu. Small sheds less than 1.2 meters in height should not use smoke, otherwise it is easy to cause phytotoxicity. 2 The dosage should be suitable: The dose should be determined according to the size of the greenhouse, the concentration of the pests and the effective content of the smoke. Under normal circumstances, the amount of common smoke agent is 0.30-0.4g/m3, 300-400g/mu. The existing smoke agents are styling products produced by pesticide companies, such as 45% of chlorothalonil smoke, 10% of fast smoke, 15% of carbendazim, and 22% of dichlorvos (for pest control). Smoke agents, such as the control of greenhouse cucumber downy mildew, disease, tomato early blight, gray mold, late blight, etc., can choose 45% chlorothalonil smoke agent, 200-250 grams per acre medication. To control cucumber powdery mildew, sulfur powder and sawdust can be mixed and self-prepared. 250 grams of sulfur powder per acre and 500 grams of sawdust are used. The amount of sawdust is adsorbed on the tile, and smoke is placed on the discharge point as required. The use of smoke agents is generally applied once every 8-10 days, and applied twice. The greenhouses with serious diseases or poorly closed ones can be increased in doses. 3 Application method: The smoke agent should be laid reasonably according to the needs, and use wire, brick, etc. as the support, and the smoke agent should be 20-25 cm away from the ground. When it is fired, it should be from the inside to the outside of the shed, in order to use the dark fire. Mosquito coils, cigarettes and other first kind of ignited, and finally lit the shed mouth of the smoke agent, all lit, immediately leave the greenhouse, quickly closed the greenhouse overnight, the next morning open the greenhouse ventilation vent, ventilation can be completed before entering the shed.
Salted Kelp Series
The original ecological kelp means that we pack the young kelp with saturated salt water directly after washing without any preservatives.Original ecological products are the favourite of housewives.
Salted kelp:
How to eat:
The difference between deep sea kelp and traditional ordinary kelp
Nutrational Effects
Salted Kelp Series,Dried Salted Seaweed,Salted Seaweed,Salty Seaweed Shandong Haizhibao Ocean Science and Technology Co.,Ltd. , https://www.haizhibaoseafood.com
Shelter vegetables to use aerosol properly