Control of acute dead seedlings in greenhouses

In places where greenhouses are used for cultivation, acute atrophy of cucumber occurs to varying degrees every year. The following measures should be taken for early prevention.

1. Because the seedlings are watered properly. The roots of cucumbers are more developed, but most of them focus on new roots in the soil surface. To avoid watering mistakes and inhibit the growth of root groups, pay attention to the watering of seedlings.

2. Set aside a small amount of planting water and pour water back into the seedlings. Low temperatures, high soil moisture, or even rainy weather, little or no water. Into the period of fruiting melons, combined with topdressing, with water, fertilizer, once every 10 days or so, to prevent excessive application of fertilizer once burned melon seedlings. It is better to water in sunny mornings and avoid watering in the afternoon and evening. Rainy days should not be watered in a full shed. It is necessary to dilute the water and not flood the area.

3. Reasonably control the temperature in the booth. The initial period of colonization is generally not ventilated. During the daytime shed, 25°C~30°C is maintained, and at night, it is maintained at 12°C~15°C, and is not lower than 10°C. With the growth of melon seedlings, it is necessary to timely adjust the temperature and control the temperature, its role are: to prevent the occurrence of diseases; to avoid plant aging; supplement carbon dioxide. However, the regulation of temperature must be conducive to the growth of cucumbers, generally the daytime temperature rises to 30 °C when the ventilation, the afternoon down to 28 °C when closing the film. The temperature during the squash should not fall below 12°C.

4. Regularly dredge the ditch around the cucumber planted in the greenhouse to ensure unimpeded flow, so that drainage can be done in a timely manner to achieve rapid water filtration. Every day, it is necessary to check if the shed film is damaged or leaking. Pay attention to repair and increase the temperature of the insulation. Before the advent of cool winds, cover the grass and lock the ropes to prevent the cold winds from invading the seedlings.

Sodium Methoxide CAS No.124-41-4

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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