Greenhouse eggplant in early spring to prevent falling and fruiting

In the early spring season (2-4 months), the temperature in the greenhouse experienced a process from low temperature to high temperature in the later stage. Plant nutrient accumulation decreased, growth and development accelerated, and frequent flowering and fruiting fell. Pests and diseases also occurred from time to time. Period of time. According to the different temperature changes, can be divided into two stages of management within the shed.
The first stage. From February to March, the general temperature is low and the soil surface is relatively dry. At this time, insulation and anti-freezing should be the main requirements. The shelf temperature should be maintained at 25-28°C during the day and 15°C at night.

Fertilization is mainly foliar spraying and root leaching and should be carried out at noon on sunny days. This is the best period for plants to absorb nutrients.

Due to weak light, insufficient nutrition, dry or wet soil, and excessively low temperature, excessive nitrogen fertilizer application and plant lengthiness can cause fruit drop and fruit drop. General use of 2.4-D20-30 mg, plus gibberellin 10-20 mg, plus 0.1% quick-king wettable powder, watered 1 kg dot flower, the flowering period of the early flowering and flowering period with the liquid coating, Applying one flower once can both increase fruit setting and promote fruit growth.

Anti-dropping agents are less harmful to young leaves and shoots. Commonly used spray method, the early low-temperature stage with 30-50 mg, 1 kg of water. As the temperature rises, the use concentration decreases.

second stage. In April, the temperature gradually increased, the humidity changed, and the wet and dry alternated. Generally, the humidity in the shed was too large. Ventilation work should be done in time to reduce the humidity in the shed and control the temperature in the shed to reduce the occurrence of diseases.

Apply fertilizer and pruning in time. With the gradual increase in temperature, plant growth is also accelerating, and it is urgently needed to supplement nutrient fertilizers, from small to large, and increase the amount of fertilizer. Generally apply 5-7 kilograms of urea per acre, topdressing once every 10 days or so; 0.3-4.4% of potassium dihydrogen phosphate or green Fenwei No. 1 or No. 3 solution should also be sprayed 3-4 times. At the same time, in combination with topdressing, timely watering to keep the soil moist. After watering, ventilation and ventilation are needed to prevent the air humidity in the shed from being too high. According to the growth of the plants, the plants were adjusted in time to ensure the best possible plant type.

Strengthen pest control. Due to the high humidity in the greenhouse and the widespread occurrence of diseases, dust or fumigant should be used to reduce the spread of water in the shed. Underground pests can be irrigated with 48% of Lozbest's emulsifier 1000 times liquid. Locust, hummer, etc. can be used to kill smoke. Disease is gray mold, with 50% fast WP 1500 times or 50% acetaminophen 2000 times once every 7-10 days, even 2-3 times. The main insect pests were aphids, red spiders, thrips, etc., which were treated with 10% of good winter 1000 times solution or 20% of behenavire emulsion 1000 times solution; red spiders were treated with 73% Kotel emulsion 2000 times.

Timely harvesting and top dressing. Harvesting should grasp the principle of “early time and fruit is tender”. It depends on the width and width of the white ring belt at the junction of the sepal and the fruit, and it is better to use a wider white ring (also known as the eggplant eye). Not only the morning market, the quality of tender, increase early production, but also conducive to the growth of late young fruit, improve the overall yield.

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