The growing environment of impatiens
Like sunny, warm and wet environmental conditions, not cold-resistant, shade-resistant, afraid of frost. Strong adaptability to soil, do not need high fertility, grow luxuriantly on moist and well-drained soil, avoid drought, otherwise it will wither and cause leaves to fall off.
Light and temperature like light, but also resistant to shade, to receive at least 4 hours of scattered sunlight every day. Shade should be carried out in summer to prevent excessive temperature and hot sun exposure. The suitable growth temperature is 16-26 ℃, and the ambient temperature at flowering stage should be controlled above 10 ℃. Enter the greenhouse in winter to prevent the cold.
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Occurrence and Control of Cotton Seedling Diseases
The occurrence of cotton seedling disease is characterized by concentrated onset time, which usually occurs 15-30 days after sowing. The primary infection source is mainly from soil and a few from seeds. Around April 20 this year, there was continuous rain and low temperatures in many provinces, and the occurrence of seedling disease was bound to be serious, so all localities should prevent and control it in time. First, symptoms (1) blight. Damage to cotton seedlings before they are unearthed will cause rotten seeds and sprouts. The disease occurred after the cotton seedlings were unearthed, and the disease spot appeared at the base of the young stem near the ground and became black and sunken at the beginning, and the disease spot gradually expanded.
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Impatiens cultivation
Impatiens, also known as henna, is an annual flower native to southern China and tropical plains of Asia. There are many varieties and rich colors, including red, pink, purple, yellow and white, as well as complex colors, which are very gorgeous. Generally divided into single and double two categories, single-petal plants conical, tall and robust, up to 80 cm. The flowering sequence is higher and higher from the bottom up, and the flowering period can be up to 1 month. Double-petal varieties have shorter plants, generally less than 40 cm, flat-topped, flowering with flower buds all around the terminal bud, and blooming neatly from top to bottom at one time.
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