Propagation methods and cultivation management of Impatiens balsamina
Method of reproduction: reproduce with seeds.
1. It is appropriate to select and prepare soil with sufficient sunshine, moist soil, fertile, loose and well-drained soil. Apply basic fertilizer and prepare the land to make a border, a high border in the south and a flat bed in the north, with a width of 1.2 m.
2. The seed of the sowing method is small and has a long life, and the germination rate is still 79.7% when stored at room temperature for 3 years. Live, March in the South and April in the North. Row spacing 35cm, open the shallow trench of lcm, spread the seeds evenly into the ditch, cover the soil with a little suppression, and then water it. The soil was kept moist after sowing, and seedlings began to emerge in about 5 days when the temperature was about 25 ℃. The seed consumption is 500g per 667 square meters.
Cultivation management:
1. Seedling height 5~10cm time seedlings, remove the small, delicate and over-dense seedlings, and determine the seedlings according to the 20cm plant distance. Reasonable close planting can lead to high quality and high yield.
2. after weeding and seedling emergence, weeds should be loosened and weeded in time to prevent weeds from competing for water. Water in time in times of drought. Ploughing and weeding 2 or 3 times a year.
3. When the topdressing seedling is high 30~40cm, the old leaves in the lower part of the stem can be removed, the top can be removed, and the branches can be promoted. At this time, every 667m2 cake fertilizer 40kg, can be downstream ditch, spread fertilizer into the ditch, cover the soil, watering. Pay attention to drainage in the hot and rainy season.
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Prevention and control of spot disease of impatiens
First, damage symptoms: disease scientific name: PhyllostictaimpatientisFautr. Impatiens spot disease is mainly harmful to leaves. Primary yellow spots, gradually expanding around into a round spot, the size of 2~5mm. The center of the post-plaque is light brown or grayish white, the edge is brown slightly raised,-dead black particles, that is, the pathogen conidium. If the bacteria invade from the leaf tip or leaf edge, the leaf tip will die and the leaf edge will be anxious. The disease occurred in Guangdong and Yunnan from July to September. 2. Morphological characteristics of pathogenic bacteria: pathogen is called Feng.
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Black spot of Impatiens balsamina
[symptoms] the lesion of the damaged leaves was round, oval, dark brown, slightly wheeled, 2mm in diameter and slightly darker at the edge. Some disease spots can expand and connect into pieces, overgrowth of light green or olive black mildew, that is, the conidiophores and conidia of the pathogen. The old leaves in the middle and lower parts are easy to be infected, and in severe cases, the diseased leaves shrink and die. [pathogen] AlternariatenuisNees. It belongs to the subphylum of semi-knowns and Alternaria. Conidiophores erect, brown
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