First, how to quickly sweeten melons
1, increase the temperature difference between day and night.
(1) The larger temperature difference between day and night is beneficial to the accumulation of photosynthetic products (sugars), so the temperature difference between day and night can be increased as much as possible during the fruit-bearing period of melon.
(2) The temperature in the shed can be kept at 30-35℃ during the day, 13- 14℃ at night, and the temperature difference between day and night can be kept at 16- 18℃. ..
2. Reasonable water control before maturity
If the soil moisture is too large during the ripening period of melon, it will not only reduce the sweetness of melon, but also easily lead to water rot. Therefore, before the melon ripens, especially within 10 days before ripening, the water content should be controlled reasonably.
3. Keep enough light.
Wipe the plastic film frequently, remove the shading leaves around the melon in time, increase the light transmittance between plants, and make the melon carry out photosynthesis better.
4. Spraying microelement fertilizer
When (1) element-deficient diseased melon appears, it will not only reduce the yield, but also reduce the sweetness. In view of this situation, the method of spraying trace fertilizer is usually used to solve it.
(2) Generally, the mixed solution of 0.3% calcium chloride +0. 1.2-0.25% boric acid can be sprayed on the leaves of melons after planting, and 1 time every 7 days for 2-3 consecutive times to supplement the required nutrients for melons.
(3) Spraying a proper amount of potassium dihydrogen phosphate foliar fertilizer in the later stage can not only increase the later yield and improve the quality, but also improve the sweetness of melon.
Second, when is it appropriate to spray Guazenggualing?
1, usage
(1) Generally, when 3-4 true leaves grow after slow planting, you can use zenggualing.
(2) Three bags of chlorfenapyr (15g/ bag) can be added to each barrel of water. After mixing the medicine and water evenly, spray it on the leaves and moisten them. Generally, each barrel of medicine can be sprayed with melon seedlings 1- 1.3 mu.
2. Use precautions
(1) You can't mix zenggualing with alkaline pesticides to avoid adverse effects.
(2) Use zenggualing in strict accordance with the instruction manual. If it is used in excess, it will lead to too many fruits and vegetables, which will affect the normal growth of fruits and vegetables.
(3) Generally, it is used in sunny morning/before 10/0 or after 4 pm.
(4) Don't spray it repeatedly, so as not to affect the growth of melons.
(5) When not in use, the medicine should be stored in a cool, dry and ventilated place to avoid direct sunlight.