At present, most of the tomatoes are in the late growth stage. The late management of tomatoes is very important to their production performance. This period is also a time when vegetable farmers can easily ignore the management. Many vegetable farmers begin to neglect management, and the results often lead to multiple diseases and premature failure of tomatoes in the late stage of growth. , directly affect the fruit's yield and quality. This period should mainly achieve the following aspects: First, to strengthen management to prevent premature plant failure. Late growth of tomatoes due to vines too long, so the roots to the top of the way to transport nutrition is also longer, nutrition is often insufficient supply, resulting in plants There is a loss. Therefore, management should be strengthened during this period to avoid premature aging of plants. The main points should be as follows: (1) It is necessary to pick up hearts, sparse leaves and fight in time. After the tomatoes sit on the fruit of the last spike, they should promptly beat the top heart. The side branches that grow in the normal season should be erased in time. For the old leaves, yellow leaves and diseased leaves in the lower part of the plant, they must be promptly removed to reduce nutrient consumption. The plant concentrates nutrients to promote fruit enlargement. (b) Spray foliar fertilizer and plant growth regulators. After the last spike, the plant does not need to be replenished. If the plant has symptoms of deficiency or failure, 0.5% potassium dihydrogen phosphate should be mixed with 6,000 times more foliar spray. .
Nutrient management must keep up. Because the tomato needs a higher amount of fertilizer, in the case of applying base fertilizer, it is still necessary to perform a reasonable top dressing. The top-dressing method is: lightly applying a quick-release compound fertilizer after flowering until flowering, and 10 to 15 kg per 667m2. After the first ear is hung, it is resumed and the fruit fertilizer is resumed once. This fertilizer is very important, which can accelerate fruit enlargement of the first panicle, increase the fruit rate of the second and third panicles, and promote the vegetative growth of the plant. . After the combination of fruit batch harvesting, top dressing is applied 2 to 3 times. The type of top dressing in the result period is suitable for selecting large feces or special compound fertilizer, and the amount of top dressing should be flexibly controlled according to the reproductive status of the plant. Generally, every time every 667m2 catches 30% of feces 10 to 15 tons or special compound fertilizer about 10kg. In the fruiting period, in order to improve the fruit quality and increase the good fruit rate, it is also possible to spray 1% of superphosphate or 0.10%-0.30% of potassium dihydrogen phosphate.
Third, a reasonable watering
The general irrigation method is: planting pouring feet "root water." Slow seedling stage according to soil conditions 1 to 2 times "rooting water." After easing the seedlings, pour it 1 to 2 times before the flowering, and raise the seedling water. From flowering to flowering, fruit should be properly controlled. Because watering too much during this period will make the air humidity increase, resulting in pollen is not easy to be fertilized caused by falling flowers. When the first batch of fruit grows to about 3cm, pour “stabilized water†once to ensure the need for fruit enlargement; this irrigation must master the period, if the irrigation is too early, it will cause leggy and fruit drop, too late will affect the fruit development. . After entering the full fruit period, when each batch of fruit begins to swell, it is necessary to pour 1 to 2 times of “strong fruit waterâ€, and the amount of water can be appropriately increased. The irrigation of the tomato field should be watered. In this way, the infection of diseases can be reduced. If it is to take furrow irrigation, the water can not diffuse, and as soon as possible speed irrigation row, just to make the soil moist. Where conditions permit, it is best to install micro-spraying or micro-droplet facilities in the tomato field, which can not only save a large amount of water, but also benefit the growth and development of the tomatoes. Fourth, prevent the occurrence of pests and diseases. If management is neglected, the occurrence of pests and diseases of tomatoes during this period will not only affect the yield of tomatoes in the later period, but also the pathogens that spread around will remain in the shed to harm the next crop of vegetables. Therefore, more effective measures should be taken in late tomatoes to prevent the occurrence of pests and diseases. Mainly should do the following aspects: (A) set up a good insect net at the outlet, in order to avoid worms, aphids, thrips, whitefly and other pests sneak into the shed, directly harm the vegetables or the virus into the shed infection vegetables. For insects that infiltrate into the shed, yellow traps can be placed in the shed, and 3% acetamiprid can also be used to control 2,000 times the imidacloprid WP 1500 times. (b) Prevention in advance. The diseases commonly found in late tomato plants include leaf mold, virus disease, and bacterial leaf spot. Leaf disease can be prevented and cured by 47% Garnett's WP 800 times at the time of initial disease; Viral disease virus A 500 times liquid control; bacterial leaf spot with DT500 times control, can effectively control the development of the disease.
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