After entering the spring, greenhouse vegetables have different management and other seasons. We must seize the points and priorities to ensure that vegetables do not have premature aging, no disease, high yield, and good quality, mainly starting from the following aspects.

1. Temperature management: During this time, the vegetables in the greenhouse are basically in the result period. With the increase of the outside temperature, the temperature in the greenhouse can basically meet the temperature required for normal growth and development of vegetables, but this period should pay special attention to the temperature in the greenhouse. The adjustment should increase the temperature difference between day and night. In general, thermophilic vegetables can be controlled at 24-32°C during the day to facilitate the formation of photosynthetic products. The temperature is maintained at 18-20°C in the middle of the night to facilitate daytime photosynthesis. The transport of organics was maintained at 13-15 °C during the latter part of the night to reduce respiratory consumption. However, the temperature required for different vegetables during the day is still slightly different. Cucumber, tomato, eggplant, etc. are not more than 30°C, preferably 28°C, and watermelon, melon, loofah, and bitter gourd are not more than 35. °C is appropriate, preferably about 30-32 °C, pepper and other crops to 26-28 °C is appropriate, summer crops and other crops to 24-26 °C is appropriate, the appropriate daytime temperature can extend the vegetable's result period to prevent the plant Premature aging, other vegetables such as leafy vegetables, onions and garlics require lower temperatures, and normal growth can occur at about 20°C.

When the greenhouse is ventilated, the ventilation volume should be gradually increased along with the continuous increase of temperature. It is forbidden to suddenly expand the vents to cause great changes in temperature and humidity to cause damage to vegetables. For example, the rind of the fruit cucumber is mainly due to sudden ventilation. When the humidity of the mouth is large, the minimum ventilation temperature is higher than 15°C.

2, fertilizer and water management: With the increase in temperature within the shed, the ground temperature will gradually increase, but the ground temperature is slower, so at this time we must pay attention to the amount of water and fertilizer, water, fertilizer to be A small amount of multiple use, avoid large fertilizers, otherwise it will cause damage to the roots, light plant leaves from the lower part of the gradual yellowing, the death of the entire plant. In addition, we must pay attention to balanced fertilization, according to the growth of the plant to appropriately reduce the amount of nitrogen fertilizer application, increase the application of phosphorus and potassium fertilizer, can be used with water flushing Tianhui brand with humic acid water soluble fertilizer or compound fertilizer (the content is 15-5-25 or 20- 5-25), 10-20 kilograms per acre can be used to take root and root to prevent tuberculosis and increase yield, while paying attention to the supplementation of trace elements, in the more severely calcium-depleted land, Tianhui Calcium Nitrate fertilizer can be applied with water, about 10 kilograms per mu, to prevent the occurrence of umbilical rot caused by calcium deficiency.

3. Light management: To remove the dust on the film as soon as possible in order to extend the light time and increase the light transmittance of the film, and to increase the yield and quality of the vegetables.

4. Pest control: Take the principle of “prevention-oriented, comprehensive prevention and control”.

(1) Fungal diseases: There are many types of fungal diseases, and the following are serious:

1Gray Botrytis: The disease is mainly invaded through the defeated female flowers, so vegetable crops such as peppers, tomatoes, eggplants, and beans should be taken out of the shed after the flowering and fruit setting. With appropriate humidity, the incidence of gray mold will be severe. The appropriate temperature for the occurrence of gray mold fungus is 20-23°C. When the greenhouse is cultivated, the relative humidity in the greenhouse will be more than 90%. The incidence of gray mold will be serious, if partial nitrogen fertilizer is applied. Poor ventilation and light transmission can also cause serious diseases. It is recommended that the farmers clean up the diseased bodies in time, and spray the pesticides such as bacteriophage, kaiser, pyrimethanil, and iprodione, once every 5-7 days. Use 2-3 times, and can do balanced fertilization, not partial nitrogen fertilizer, the results can be applied Tianhui brand high potassium compound fertilizer (14-6-30) or high nitrogen and potassium compound fertilizer (20-5- 25) Wait for calcium nitrate fertilizer to improve crop resistance.

2 target spot disease: that is, corynespore leaf spot, the vegetable farmers commonly known as "small yellow spots", mainly occurred in the melon crops, the beginning of the disease is a small yellow spot, after the gradual expansion of the leaf surface lesions rough, The lesions are brown overall, with central grayish white and translucent. The lesions in the late stage can reach 10-15 in diameter. There is a clear eye-like bull's-eye in the center of the lesion, and the disease is fast when the humidity is high, and sparse gray-black mouldy material can be born on the lesion. In the prevention and treatment of this disease, drugs should be used to prevent and control diseases and then watered to avoid the disease caused by high humidity. You can use Fudi, Nuofan, Lunasen, Kinda and other pharmaceutical agents. In order to prevent the occurrence of bacterial diseases, you can add fine In addition to pesticides such as the enemy, net fruit extract, Thiobacillus copper, thiazole zinc, etc., it is also necessary to strengthen the nutrition of the plants. The Tianhui brand with rooting and rooting is treated with humic acid-soluble water-soluble fertilizer, and the leaf surface is supplemented with guerfu boron-calcium fertilizer. Japan's royal family is free of fattening, love and beauty, and Hailijia.

3 leaf mold: not only harm the leaves of vegetables, but also seriously harm the flowers, stems and fruits, the beginning of the first disease leaves, leaves appear yellow-green, the edge is not obvious lesions, leaves on the back of gray mold layer, mold layer color Gradually darkened, it became light brown to dark brown; when the humidity was high, the lesions on the front of the leaves also had moldy layers. When the disease began, the lower leaves first developed, and then gradually spread upwards. When the disease became severe, the moldy layer was covered with leaves and back, and the leaves curled. The entire leaf was yellow-brown and dry. Similar lesions can also be produced on tender stems and pedicels, and the incidence of floral organs is easy to fall off. Onset of fruit, black round or irregular plaques formed near the fruit pedicle or on the fruit surface, hardened dents, inedible. It is recommended to remove the lower diseased leaves and bring them to the shed. In order to use the drug promptly, tebuconazole, difenoconazole, azoxystrobin, myclobutanil, Fuxing, etc. can be used. When spraying, it is necessary to pay attention to even spraying of the liquid to the back of the leaves.

4 Scab: Cucumber can be infested during the entire growth period. Cotyledons usually produce yellowish-white near-circular lesions during seedling stage. When severe, the entire cotyledon is dry and affects the growth of seedlings; tender stems become infected and begin to appear. Spindle-shaped water-stained dark green lesions, later turned dark, sunken cracks; lesions brown rot rotten lesions; growing point disease, rotten in a short time to form a bald pile, farmers say cucumber "bad"; leaves begin When the disease appeared, it was stained with green and near-circular spots, perforated lately, became radial and had yellow halos on the edges; petiole, melon vines were damaged, the middle of the disease department was sunk and formed scab-like shape; melon strips were infected, and the melon strips were infected. Afterwards, it was expanded to a brown pitted spot. When the humidity was high, the disease minister produced a gray moldy layer, which caused the diseased part to be sore, and the diseased part stopped growing, causing malformation of the melon strip. When the humidity is high, the gray-black mold layer grows in the diseased parts, namely the conidia and the conidiophores. The occurrence of black scab has a great impact on the yield and quality of cucumber, so it must be prevented as soon as possible. When the temperature is between 15-25°C, the relative humidity is high, and when the leaves are condensed, the occurrence of scab is easy to occur and popular.

Foliar can be sprayed with Fuxing, Myclobutanil and other agents, but can not arbitrarily increase the concentration of use, to avoid the growth of cucumber growth point due to overdose, if the growing point is inhibited, you can use love Zengmei 3000 times or Hai Li 500 times better to adjust the growth point growth.

(2) Bacterial diseases: Bacterial diseases have occurred more severely in recent days. Attention should be paid to avoiding agricultural operations during rainy weather, avoiding wounds and reducing the occurrence of bacterial diseases. There are many types of bacterial diseases, but medications are used for prevention and treatment. Basically similar, such as bacterial keratopathies, soft rot, ulcer disease, myelial necrosis, bacterial wilt, etc., can be controlled by the use of Pseudophytes, Thiobacillus copper, quinoline copper, mesobacillus, etc. Spray once every 4-5 days, 2-3 times of continuous medication, while paying attention to the supplement of foliar nutrition.

(3) Insect pests: First, yellow traps hanging in sheds to kill locusts, whiteflies, etc., hung blue plates for killing thrips, etc., releasing predatory mites can control the occurrence of mites, and secondly, spraying pesticides such as avermectin, imidacloprid, etc. Kill green insects, etc., and use them once every 5-7 days.

(4) Physiological diseases: During this period, peppers, tomatoes and other vegetables often cause umbilical rot, and can be used to flush Tianji brand calcium nitrate fertilizers. Each time about 10 kilograms per mu can prevent the occurrence of umbilical rot. At the same time, Boron fertilizer should be added in time to increase the absorption of calcium fertilizer.

(5) Viral diseases: With the increase of temperature, the occurrence of viral diseases will become more and more serious. It is necessary to adjust the temperature of the greenhouse to a suitable temperature, and at the same time, the groundwater is poured to avoid the formation of high temperature and drought conditions, and at the same time Zinc fertilizer, iron fertilizer, etc. improve the resilience of vegetable crops.

Once the virus disease is difficult to cure, when a small number of plants start to develop, the diseased plants can be removed in time and sprayed with pesticides to suppress the occurrence of viral diseases. Ningnanmycin + zinc fertilizer + Azengmei (1000 times fluid) can be sprayed. , to achieve the purpose of inhibiting the occurrence of viral diseases. At the same time, pests in the shed must be prevented and treated in a timely manner to prevent transmission of viral diseases due to pests causing wounds.

Anti-Aging

China Anti-Aging Suppliers

Here you can find the related products in Anti-Aging, we are professional manufacturer of Anti-Aging. We focused on international export product development, production and sales. We have improved quality control processes of Anti-Aging to ensure each export qualified product.

If you want to know more about the products in Anti-Aging, please click the Product details to view parameters, models, pictures, prices and Other information about Anti-Aging.

Whatever you are a group or individual, we will do our best to provide you with accurate and comprehensive message about Anti-Aging!

Here you can find the related products in Anti-Aging, we are professional manufacturer of Anti-Aging. We focused on international export product development, production and sales.

Acetyl Hexapeptide-8,achirellin,polypeptide, Anti-Aging,peptide

Xi'an Gawen Biotechnology Co., Ltd , https://www.ahualynbio.com