In recent years, after entering the winter, fog and haze weather is severe, with few photos, weak photos become frequent. In case of rain and snow cooling weather, greenhouse humidity, light and weak, it is easy to cause disease. Once you do not pay attention to disease outbreaks, prevention and control is very difficult, but also easily lead to weakening of vegetables, decreased resistance, recurrent disease, vegetable yield and quality are greatly affected.
Knowledge popularization: weak light, high humidity and other environments, photosynthesis of vegetables is weak, more respiratory consumption, less accumulated nutrients, decreased resistance will inevitably lead to shed a series of adverse symptoms of vegetables, not only serious infectious diseases, falling flowers, Fruit drop, yellow leaves and other physiological problems are also very easy to happen.
Demand for light from different crops grown in greenhouse
★ Grapes: the best sunshine 12 to 16 hours. Sturdy plant performance, leaf color dark green, shiny, full germination, fruit coloring good, good taste and high yield.
★ Strawberry: the best sunshine 8 to 9 hours. Effectively promote growth, flowering results, fruit size uniform, good color, no deformity.
★ Melon: the best sunshine 12 to 15 hours. The performance of plant robust, leaf color dark green and shiny, full germination, fruit coloring, shorten the growth cycle, high yield and good taste.
★ Tomatoes: the best sunshine 12 to 13 hours. Effectively promote plant photosynthesis and flower bud differentiation, prevent deformities, effectively promote early maturity, early market, improve the taste and improve earnings.
★ Eggplant: the best sunshine 11 to 14 hours. Promote plant growth and germination, flowering in advance, increase production, shorten the growth cycle, improve economic efficiency.
★ Cucumber: the best sunshine 13 to 14 hours. Promote plant growth, flowering in advance, effectively prevent the wilting, deformities, diseases, etc., increase production, shorten the growth cycle, improve economic efficiency.
★ West gourd: the best sunshine 13 to 14 hours. Promote plant growth, early flowering, effectively prevent the seedlings, diseases, etc., increase production, shorten the growth cycle, improve economic efficiency.
Solution: keep the film clean, increase the amount of light transmission. Strengthen the management of greenhouses cover, through the timely disclosure, timely cover, make full use of cloudy scattered light, so that plants photosynthesis. When necessary, artificial fill light will be fine.