The strengthening of the spring management of open field strawberries is the key to promoting early fruits, high quality and high yields. The measures are as follows:
When the average temperature is about 10°C on the day when the cold cover is removed, cold cover on the strawberry seedlings can be gradually removed. Be careful not to break flower buds. If the film is covered, when the film is uncovered, it is necessary to do a good job of hardening seedlings to prevent the sudden temperature difference from being too large and affect the growth and development of the strawberries.
When the old leaves are removed in time, the cultivars should be cultivated and weeded in time, but the cultivator should be shallow, and prevent the soil blocks from pressing down the seedlings, and the drains should be cleared. At the same time, the old leaves, dead leaves, and diseased leaves of the strawberries should be preserved. Clear out to prevent transmission.
Fertility promotes early-onset after a winter dormancy. After spring, the temperature rises and the strawberry begins to grow. Applying fertilizer in time can promote the early growth of the plant, form new leaves as soon as possible, increase the number of effective flowers, and increase the fruit setting rate. Because strawberry roots are shallow and sensitive to fertilizers, they are prone to fertilizer damage. To prevent the use of ammonium bicarbonate, urea, compound fertilizer, or human waste should be used. The amount of use should be controlled by 5-6 kg of urea per mu, 1000-1250 kg of human waste, 10-15 kg of compound fertilizer, and watering with fertilizer once. During the fruiting period, 0.2% potassium dihydrogen phosphate solution was sprayed on the leaves for 1 to 2 times, which had a good effect on improving quality and increasing yield. Watering should be done with little water and keep the land moist. After entering the fruit ripening period, it is necessary to properly control the water. During the drought, small water should be poured every evening after the fruit is harvested. Do not flood with water, otherwise it is easy to infect the disease and cause a lot of rot.
After flowering and fruiting, the new stems of strawberry are inoculated with inflorescences. Generally, there are 10-30 flowers in each inflorescence, too many flower buds, insufficient supply of nutrients, weak growth, small fruit and malformed fruit will increase. Therefore, after budding, thin and thin flower buds should be sparse, and another sparse flowering period should be carried out during the flowering period to concentrate the supply of large flowers, increase the fruit setting rate and fruit weight, and sparse buds and sparse flowers. Each plant retains inflorescences 2 to 3, each Inflorescence leaving 3 to 5 fruit is appropriate.
After fruit set and strawberry harvested, as the fruit increases, the ear drops, should be promptly placed under the ear with wheat straw, prevent fruit from contact with the ground pollution or rotten fruit. When the fruit's fruit surface 2/3 is colored, harvest it in time and harvest it in the morning after the dew is dry. When picking, do not touch the pulp. Gently pinch the handle and bring a part of the handle to the cleaning container. , Graded, sold or processed immediately.
Prevention and control of pests and diseases Strawberry plants are dwarf and grow on the ground, and fruiting time is long. Fruits are easily exposed to the ground and are vulnerable to pests and diseases. Integrated control measures must be adopted. Diseases and pests mainly include: viral diseases, powdery mildew, gray mold, brown spot disease, and underground insect pests such as mites.
1. The fundamental measure of viral disease is the use of virus-free vaccines to eradicate aphids. At the beginning of the disease, 1.5% of the diseased planting emulsion was sprayed with 1000 times or 83% of the potentiator was sprayed with 100 times.
2. Powdery mildew with 12.5% ​​myclobutanil 2000 times or 20% triadimefon 1000 times.
3. Gray mold use 50% nongrilled 800 times wettable powder or 50% quickan wettable powder 1000 times.
4. Brown spot use 2% agricultural anti-120 water 200 times or 50% thiophanate 500 to 1000 times.
5. Aphids use 50% anti-inferiority WP 2000 times solution or 10% imidacloprid wettable powder 1500 to 2000 times solution.
6. Underground pests such as earthworms and cockroaches, 80% trichlorfon WP 200-250 g or 40% phoxim EC 200-300 g per mu, and watering 500-750 kg for irrigation or irrigation. Note that the use of drugs should be stopped 15 days before fruit picking to prevent poisoning.
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