1. Selection of varieties: only in the low-temperature conditions more pollen, fruit sour, deformed fruit less varieties, it is suitable for promoting cultivation. From the perspective of quality, it is generally advisable to choose "Fengxiang" and "Mingbo" and other varieties.
2. Enhanced lighting: Lighting not only directly affects the photosynthesis of plants, but also indirectly affects the coloration of fruits. If the light is insufficient before and after flowering, it will affect the accumulation of starch in the pollen, so that the energy of the pollen germination is not enough, resulting in a reduced germination rate, thereby affecting fertilization, resulting in malformed fruit. Therefore, when covering the shed, you should use a polyethylene with no light transmission film. Always clean the dust on the film and hang a 2 meter high mirror reflective film on the wall. In this way, not only can increase the utilization of light, but also can improve the temperature of the greenhouse 2-3 °C. In addition, the adoption of measures such as early dismantling of the grass and evening drapery, laying of a silver-gray reflective mulching film, and timely removal of shading old leaves can enhance light.
3, covering the film: the biggest advantage of covering the film is to reduce air humidity, reduce pest damage, can effectively make the fruit do not touch the ground, to avoid the production of soft fruit, and the fruit surface is clean. The best way to use water irrigation drip irrigation, flowering results can not flood irrigation, this time the humidity in the shed is appropriate in about 75%, the humidity is too large to cause the pollen is not easy to spread, affect the normal fertilization, increase the production of deformed fruit. Therefore, timely ventilation and dehumidification should be performed, but the temperature should be maintained at 20-25°C to facilitate pollen germination. During the flowering period, 0.5% potassium dihydrogen phosphate or 0.2% borax + 0.4% potassium dihydrogen phosphate + 0.5% sugar solution may be sprayed on the leaf surface to improve fruit quality.
4. Assistant pollination: During the flowering period, a box of bees can be stocked in the shed to facilitate pollination, but it is necessary to control the temperature so that the bees can perform normal activities. Artificial pollination can also be assisted.
5, a reasonable spray; spraying pesticides during strawberry blooming, it is easy to induce plants to produce deformed fruit, at the same time will affect the pollination of bees. Therefore, try not to use dipterex, mancozeb WP, etc. before spraying to make the plants produce malformed fruit. Remove the beehive from the shed before spraying, and return it to the shed within about 1 week after spraying.
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