It is well-known that strawberry farmers in strawberry fields are a very difficult disease to control for strawberry farmers. Once they are infected, the entire plantation will be endangered and almost impossible to control. Even if pesticides are sprayed, the effects are often not good, which not only takes time and effort, but also increases the cost. It also affects the quality and residual pesticide damage. According to a farmer who has been planting vegetables for many years in Ibaraki Prefecture, Japan, after long-term production practices, an effective prevention and control method has been summed up. That is, in a greenhouse where crops such as strawberries are planted, the room temperature is raised to 35 once a day. Around the °C measure, we can prevent gray mold in the greenhouse. The following will introduce the actual operation methods to the majority of farmers. 1. Significant effect in controlling pests and diseases If a diseased plant is found in a greenhouse, this measure should be adopted in a timely manner. Every morning, the temperature of the greenhouse should be increased to 35°C. Once a day, be careful not to ventilate. This can prevent the spread of gray mold. However, in the event of continuous rainfall, the disease will often relapse quickly. Therefore, in this case, the temperature should be raised to about 45°C for 2 hours. After such treatment, the spread of the disease will be controlled. In addition to controlling diseases such as gray mold, it also has a certain inhibitory effect on powdery mildew. 2, the origin of the high temperature of 35 °C In general, the temperature of 35 °C is an important reference. This is mainly to take into account the bearing capacity of the bee's physiological activities. Every farmer who grows vegetables knows that the bee is a kind of plant pollinating the natural media insects. It is suitable to move at a temperature of 15 to 35°C. If this limit is exceeded, the bee will stop the pollination and pollination work. However, even if it is at a temperature of 40°C or more, it will not cause physiological disorders to the strawberry. Therefore, considering the physiological function of bees, setting the temperature of the greenhouse to 35°C has its own reasons and scientific basis. 3, high temperature does not cause harm to the growth of strawberries generally people will think that the high temperature environment will have a negative effect on the growth of strawberries. However, long-term practice has proved that humidity, moisture, and fertilizer are necessary environmental conditions and material basis for its growth. Although humidity is one of the causes of gray mold, it is also necessary to distinguish between low temperature and high temperature, which is one of the keys to prevention of gray mold. In general, gray mold occurs in cold and humid environments. If the temperature in the greenhouse is too high and the humidity does not rise, the stems and leaves of the plants will suffer from high-temperature burns. Therefore, for the normal growth of strawberries, while maintaining a suitable temperature, we must maintain a certain degree of humidity. 4. High temperature control will not reduce production In the long-term production practice, the following measures are summarized: In order to obtain the transplanted coriander plants, before mid-April, the mother plant should be planted on a plastic film boring bed in a greenhouse and sealed growth conditions After about 20 days, the mother plants can bloom. Afterwards, a 10cm circular hole is opened every 3m on the film to facilitate ventilation. At the same time, it is necessary to control the temperature of the plastic film to rise to around 45°C every day to prompt the plants to set fruit as quickly as possible. Even under such a high temperature environment, the fruit size and yield were not affected. In this way, about the middle of December, the stem length of plants can reach about 30cm, and artificial lighting is not required to consume electrical energy. The seedlings will continue to grow and will not enter dormancy. In addition, the temperature in the shed will fall rapidly after winter, and in order to maintain the minimum suitable growth temperature of 5 to 8°C, geothermal energy and other heat preservation measures can be used. However, winter nighttime is often the peak of gray mold. In order to reduce the humidity, some waste newspapers can be placed on the road between trampolines to absorb the moisture in the air, so as to achieve the purpose of removing the gray mold. At the same time, it also saves a lot of money and reduces costs. For this pollution-free prevention and control of gray mold, the majority of farmers may wish to try.
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