Strawberry greenhouse cultivation is in the winter and early spring, low temperature, low humidity, short sunshine, less insects, affecting the anther cracking and pollen scattering, poor pollination, easy to produce a variety of deformed fruit, seriously affecting the yield and quality. To create good pollination conditions, besides paying attention to ventilation and reducing air humidity, the main use of bees is to assist pollination. Studies have shown that in greenhouses with dense bee pollination, the fruit set rate is significantly increased, the fruit yield is increased by 30-50%, and the number of malformed fruit is only 20% of the bee-free area.
In the 5-10 days before the air release, the pests and diseases, especially the insect pests, were completely controlled in the shed. After the beehive is put in, it is generally impossible to apply pesticides, especially pesticides. One week before the flowering of the strawberries, the beehives are moved into the shed. Usually, 1 box is placed in a shed, and 1 strawberry is stocked in a ratio of 1 honey. The bee box is placed in a well-lit place in the middle of the booth. It is 15 centimeters from the ground. The beehive exit should avoid direct light, so as to avoid the impact of the light when the bees fly out and cause increased mortality. Place it in the morning or at dusk. The bees are out of the nest at a temperature of 5-35°C, and the optimum temperature for living is 15-25°C. The temperature of bee activities is consistent with the optimum temperature (13-20°C) for strawberry anther splitting. When the temperature is below 10°C for a long time, bees will reduce or stop their nesting activities. To create a good environment for bee pollination, the temperature should not be too low. However, when the temperature exceeds 30°C, the wind should be promptly released.
In the production of bees should understand the living habits, to minimize death. In practice, the following points should be noted:
1. Decrease the humidity in the greenhouse, especially after long-term rainy weather, the humidity in the shed is high, and more water droplets are collected on the shed film. When the sunny bees go out for activities, they are easily hit by water and die. Therefore, it is necessary to increase the ventilation and dampness in the cloudy sky. The desiccant such as lime bottles can be placed in the beehive to reduce the humidity.
2. When a variety of coverings are used in a greenhouse, the medium-sized and small-sized greenhouse films must be placed under both sides. Otherwise, when the bees fly around, they get caught in the cracks in the film and get pinched.
3. To prevent pests and diseases, choose pesticides that are non-toxic or have low toxicity to bees. When fighting drugs or using fumigants, close the holes of the beehive or move the beehives to the outside and move them to the greenhouse every 3-4 days to prevent bees. Poisoning died.
4, less honey in winter and early spring, to strengthen feeding. The amount of feeding is based on normal bee pollination of the bees. Otherwise, overfeeding will occur, the bees will not pollinate, or the feed will be too little, and the bees will be unable to fly and pollinate, resulting in the failure of bee pollination. Choose white sugar and clean water in a ratio of 1:1. After cooling, feed water without too much moisture to prevent bees from becoming ill. Each plate of bee (2500) white sugar consumption of 1 kilogram, feed before the end of January, you can also paste white sugar and water ratio 2:1 to make a paste filling the bee tank, one-time feeding and increase pollen feeding .
5, when the bee is put in order to prevent the bee colony from draining from the air outlet, a layer of anti-escape net should be added at the air outlet.
6. The time for the bees to bloom is the first flowering of the first flowering strawberry until March of the following year.
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