How should tomato umbilical rot be prevented?

Tomato is one of the main fruits and vegetables in daily life. Also known as tomatoes, because of its rich nutrition and unique flavor, it can be eaten raw, cooked, processed into ketchup. Therefore, it is widely planted throughout China. However, in the process of planting and production, umbilical rot is the most common physiological disease of tomato, which seriously affects the yield and quality of tomato, and also causes great economic losses.

How should tomato umbilical rot be prevented? Linyi Fertilizer Network Copyright
The main symptoms of umbilical rot are: water-stained dark green lesions on the top of the initial fruit, the color changes to dark brown in a short time, the flesh loses water, the top is flat, generally does not rot, when the humidity is high, the disease Some fungi are spoiled on the plaque, producing pink or dark brown mold. This disease is severe in tomato disease during the green period. The main cause of the disease is calcium deficiency. The absorption of calcium by tomatoes is hindered by excessive soil drying, excessive nitrogen fertilizer, excessive ground temperature or acidic soil. Or due to insufficient supply of calcium during fruit enlargement. The following measures can be taken to prevent and control: 1. Prevent soil moisture from being too dry or too wet. Apply appropriate amount of nitrogen fertilizer, add organic fertilizer, or apply calcium fertilizer. 2. At the beginning of the first fruit setting, spray 1% superphosphate, or 0.5% calcium chloride, or 0.1% calcium nitrate solution, spray once every 7~10 d, and spray 2~3 times. Linyi Fertilizer Network Copyright
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General Safety Information:

1. Check if the plug cord was in good condition, and if there is stand before plug into the electrical outlet ; Check if the used glue gun has glue flow through back of the tunnel;

2. wait 5-10 minutes to allow glue to soften, stand up the glue gun on the table when not in use;

3. Touch nozzle to any clean, dry surface you wish to bond, to avoid any impurity stop the nozzle;

4. If the glue could not flow from the nozzle when the glue gun start to work, check if the glue gun are heating;

If glue gun can not be heated, there are following reasons:
1 Plug cord into electrical outlet not properly;
2 Glue gun has been destroyed owing to inner cord short circuit;

If glue gun can be heated, there are following reasons: Nozzle has been stopped by any impurity, ask careerman to manage it.

5. Do not use the glue gun under moist climate, humidity will affect insulation and cause electric shock;

6. Do not touch the nozzle or melted glue;

7. Do not remove out the melted glue stick from the tunnel back side, it will damaged the glue gun as well as scalding person hands.

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10. Only used for melting glue stick, no other usage;

11. When in use, there are any glue flow back from tunnel, stop using immediately, wait for careerman clean the glue;

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Important Caution:

1. Before use the glue gun, check if the plug cord into electrical outlet properly;

2. When glue gun in first use, the heating element will have small smoke, it is normal situation, but the smoke will disappeared after 10 minutes;

3. After power, not for a long time in standby mode(not longer for 20 minutes), when the suspension of use, unplug first.

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6. When in continuous using, do not press the trigger with great pressure, and try to squeeze out the un-melted glue, it would damage the glue gun

7. Not applicable for bonding heavy objects or objects needed strong adhesive

8. The quality of glue stick will directly influence the glue gun function and sticking objects quality;

9. If the power cord is damaged, do not replace it by yourself, must ask for professionals to replace it.

10. This tools must b e placed in its position when not in use. And storage before the tools complete cooled.

11. Be careful when using any other electrical appliance with flammable material.

12. Not applicable for a long time in the same place.

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Using methods

1. Glue gun using voltage is 110-220V AC,50/60Hz;

2. Tip gun forward on stand and place a piece of cardboard under the nozzle

3. Use 7-8mm (mini trigger glue gun), 11-12(big trigger glue gun), insert glue sticks through
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