In the midsummer season, the high temperature and high humidity environment has high requirements for vegetable management technology. It is necessary to strengthen the drought and waterlogging prevention, top dressing, cultivating and weeding, flower preservation and fruit protection, and pest control in the vegetable field. The main points of common vegetable management are as follows:
Tomato: Properly control fertilizer and water in the early stage, topdressing in time after fruit setting, pay attention to the prevention and control of early blight, cotton rot, virus disease, aphids and cotton bollworm.
Eggplant: Regenerative eggplant should strengthen the management of fertilizer and water, keep it moist, and focus on the prevention and treatment of verticillium wilt, cotton rot, and brown streak. For autumn eggplants or late autumn eggplants, about 10 days after planting, fertilizer and water management must be strengthened. Irrigate with fertilizer during drought, and drain water immediately after heavy rain.
Autumn extension cucumber: The focus is on preventing and controlling pests. When 2-3 true leaves are used, spray the medicine every 7 days to prevent downy mildew. For 3-4 true leaves, spray 40% ethephon (concentration of 100 mg/L) twice, once every 2 days.
Zucchini: The key is to prevent and control the occurrence of viral diseases, and attention should be paid to the prevention and control of aphids in the early stage of growth. After heavy rains, clear the ditch and drain the soil in time, and add fertilizer. Plowing frequently, especially after watering, topdressing and raining, should be plowed once in time.
Pumpkin: From the end of August to the beginning of September, the withered old vines should be cut off, and 1 to 2 strong side vines at the base should be selected, and 30% decomposed human and animal manure should be applied to keep the soil moist.
Loofah: Water in high temperature and drought, and adopt the method of "dark water". After the rain, it is necessary to clear the ditch and drain the stains in time, and use well water or deep river water to irrigate the ground, so as not to rain, the melon leaves will wilt and affect the fertility. Topdressing and watering should be carried out in time. After heavy rains, cropping should be carried out in time to prevent pests and diseases.
Summer Chinese Cabbage: Pay special attention to the occurrence of soft rot, Spodoptera litura and other diseases and insect pests in early autumn Chinese cabbage. After planting to the live tree, the seedlings should be watered in the morning and evening. Before and after the lotus period, water frequently to keep the soil moist. Baoxin started, pay attention to watering and drought resistance.
Early autumn radish: Keep the soil moist and water it in time when drought occurs. Pay special attention to the prevention and control of pests in the early stage. After emergence, the main prevention and control of jumping beetle, and the timely prevention and control of aphids after the emergence of true leaves. In late August, spray 90% trichlorfon 800 times solution and 80% ethyl phosphine aluminum 400 times solution to control other pests and downy mildew.
Celery: Pay attention to using shade nets or straw curtains to build shade sheds in time, strengthen top dressing and watering, and keep the soil moist. Timely control of aphids, soft rot and leaf spot.
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Sodium Methoxide Physicochemical Properties
Density 0.97 g/mL at 20 °C
Boiling point 65 °C
Melting point -98 °C
Molecular formula CH3NaO
Molecular weight 54.024
Flash point 11 °C
Exact quality 54.008160
PSA 23.06000
LogP 0.04670
Appearance traits transparent liquid
Vapor density 1.1 (vs air)
Steam pressure 50 mm Hg ( 20 °C)
Refractive index 1.3700
Storage Conditions
1. Storage: sealed and stored in a cool, dry and dark place
2. Sealed in iron drums, 200kg per barrel, stored in
Cool, ventilated, dry place, fireproof, heatproof, prevent
show. Store and transport according to flammable chemicals.
Sodium Methoxide Application
1. Mainly used as raw materials for medicines and pesticides, also used in dyes and chemical fiber industries.
2. It is used as a condensing agent in organic synthesis, as a catalyst in the treatment of edible oils and fats, and as an important raw material for the synthesis of drugs such as sulfamididine, sulfamethoxazole and sulfonamide synergist.
3. Used as an alkaline condensing agent and catalyst in organic synthesis, used in the synthesis of perfumes, dyes, etc., and is a raw material for vitamins B1, A and sulfadiazine.
4. Used as a condensing agent for organic synthesis
5. Fat transesterification catalyst. To change the fat structure, make it suitable for margarine and so on. Must be removed in the final food.
6, mainly used as a condensing agent, strong alkaline catalyst and methoxylation agent, used to prepare vitamin B1 and A, sulfadiazine and other drugs, a small amount for pesticide production. It is also used as a catalyst for the treatment of edible fats and edible oils, especially lard. Also used as an analytical reagent.
7, mainly used in the production of vitamin A1 vitamin B1 long-acting sulfonamide, sulfadiazine, trimethoprim and other pharmaceutical industries, can also be used in the biodiesel industry. It can also be used as an edible catalyst and analytical reagent.
8, mainly used as a condensing agent; strong alkaline catalyst and methoxylation agent, used to prepare vitamins B1 and A; sulfadiazine and other drugs, a small amount for pesticide production. It is also used as a catalyst for the treatment of edible fats and edible oils, especially lard. Also used as an analytical reagent.
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