Management Methods For Growing Strawberries in Greenhouses

1. Temperature management method: During the leaf unfolding and budding stages, the temperature should be relatively high, preferably 20-30°C during the day and 12-15°C at night. If the temperature is too high, the flower whiskers will stretch too fast. Pay attention to ventilation. The optimal flowering period is 20-20℃ during the day and 8-10℃ at night. Ventilation must be done well. The optimal fruit expansion period is 16 to 26°C during the day and 5 to 7°C at night. If the temperature is too high, the fruit will not easily expand. When the fruit is not fully enlarged, the fruit will be colored red. Therefore, during the picking period, it is best to have around 20°C during the day and around 6°C at night, and avoid exorbitant temperatures.

2. Management methods during the flowering period: free-range bees or Osmia bees in the greenhouse for pollination. Because the ventilation in the greenhouse is not good, the natural pollination is not good. Beefeng can help pollinate the blueberries in the greenhouse, increase the fruit bearing rate, and reduce the total number of deformed fruits. The active temperature of bees is 16-30℃, which is similar to the temperature management method during the flowering period in greenhouses (20-20℃). One greenhouse can support one box of free-range bees, which should be placed on the southwest side of the greenhouse. The entrance and exit of the beehive should face east and south to prevent the bees from falling over and hitting pillars when they fly out.

3. Liquid fertilizer management method The fertilization period is mainly determined based on the growth of the main stem and the color of the tea leaves. The blueberry harvest period in greenhouses is long, and a lot of nutrients will be consumed in the middle and later stages of the fruiting process. The main stems will weaken, so fertilization is mainly carried out during the fruiting period. 0.4-0.6% paclobutrazol and 0.5% urea solution can be applied to the leaves. Irrigate appropriately every quarter to keep the ambient humidity in the greenhouse at a relative humidity of 75% to 90%. The ambient humidity during the flowering period should be lower, usually 65%. But be careful not to make the road surface and humidity too high. When the ambient humidity and temperature in the greenhouse are high, it is easy to be infected with gray mold, powdery mildew, etc. The adjustment of temperature and humidity mainly relies on ventilation.

4. Pest Control Blueberry diseases can be prevented by selecting varieties with strong defenses, cultivating strong seedlings, using soil disinfectants, and improving planting management methods. It is forbidden to spray pesticides during the flowering and fruiting stage, and organic chemicals can be sprayed before blooming for prevention and control.
1. Powdery mildew prevention should be carried out in the early stage of the disease. If the disease is severe and spreads, prevention will be difficult. You can spray 75% thiophanate methyl, 700 to 1500 times more air oxidizing mycin hydrate, 700 times 60% sterilin, 3500 times 20% fentanin, etc. Spray the pesticide on the underside of the leaves as much as possible
2. Bud bugs usually live in groups on the back sides of leaves and petioles, sucking sap, causing the growth of the main stem to weaken, the rhizome to stop growing, and in severe cases, the young leaves will curl. Budworms are also a key mediator in the spread of strawberry viral diseases. Aphids are more likely to occur in greenhouses than in open field cultivation, so precautions should be taken. Chemical control can be sprayed with 50% dimethoate solvent 3000 times, 50% omethoate 3500 times, 20% pyrethrin solvent 3500 times, or fumigation with smoke. Drugs should be used alternately to prevent drug resistance.