Main points of sowing and Propagation of Cuiju

Cuiju is a very important horticultural variety at home and abroad, and now dwarf varieties are used in potted plants and flower beds in the world. The cultivation of green chrysanthemum has a long history and is one of the most important potted flowers. Artificial propagation of green chrysanthemum can be done by sowing.

Cuiju

Green chrysanthemum is often sown and propagated. The sowing time is determined according to different varieties and application requirements. Take the potted variety asteroid series as an example: it can be sown from November to April of the following year, and the flowering time can be from April to August. Cuiju has 420-430 seeds per gram, and the optimum temperature for germination is 18-21 ℃. It germinates 7-21 days after sowing. The seedlings are growing rapidly, and it should be time for seedlings. With fully mature high-quality organic fertilizer as base fertilizer, chemical fertilizer can be used as topdressing, generally more spring sowing, summer sowing and autumn sowing, and can blossom in 2-3 months after sowing.

The florescence can be controlled by sowing in batches as needed. After sowing in the greenhouse from February to March or sowing in the sunny border in March, the dwarf species can blossom from May to June; from April to May, sowing in the open field from July to August; sowing in the last ten days of July, which can blossom in "National Day"; sowing in the first and middle of August, the seedlings overwintered in the cold bed, and the May Day blossoms in the following year. The medium-sized varieties were sown from May to June, flowered from August to September, sowed in a cold bed in August, and flowered from May to June the following year. Tall varieties can be sown in spring and summer, and all blossom in autumn, but it is suitable to sow in early summer.

Control methods of Verticillium blight in Cuiju

Main points of recognition: the seedlings were damaged in the middle and later stage, resulting in oval dark brown disease spots and depressions at the base of the stem. After the development of the disease, the disease spot gradually expanded, but around the stem, the disease part constricted, the diseased plant began to die from the lower leaves, and then the whole plant died. When the humidity is high, the disease spot grows out of the hyphae, the hyphae is brown spider silk, and sometimes irregular brown sclerotia can be seen. When using seeds to propagate and be infected, it can cause rotten seeds not to emerge.

Occurrence characteristics: the pathogen is Rhizoctonia. Under suitable temperature and humidity, the hyphae invaded the host and spread with Rain Water, irrigation water and agricultural operation. It often occurs when the seedlings are too dense, too long, and the temperature management of the seedling bed is unreasonable.

Prevention and control methods:

The main results are as follows: (1) choose the disease-free seedling bed with good drainage.

(2) the soil of the seedling bed can be disinfected and fumigated with formaldehyde. the method is to spray 40 ml formaldehyde and 2-4 liters of water per square meter 20 days before sowing, and immediately seal with thin film, uncover the film and loosen the soil after 1 week, and sow 2 weeks later. It can also be mixed with 50% carbendazim wettable powder and 70% methyl thiophanate wettable powder according to the ratio of 1 to 200 herbal soil; the potted soil for family flower cultivation can be sterilized at high temperature.

(3) in case of sporadic onset, spray with 75% chlorothalonil wettable powder 800 times, 64% disinfectant alum 500 times, 50% carbendazim wettable powder 800 times, and 5% Jinggangmycin water 100 times.

Key points of family flower cultivation in August

Flowers suitable for courtyard display in August, with high temperature, strong light and low humidity, is the period of high temperature and dry heat in a year, second only to July. The monthly average temperature in most parts of the country is between 24 ℃ and 28 ℃.

The potted ornamental plants which are suitable for display in the courtyard are some species that like light or bear high temperature.

The main woody flowers are: southern fir, black pine, golden pine, five-needle pine, gold pine, Japanese golden pine, white bark pine, Japanese fir, Huashan pine, Luohan pine, round cypress, cycad, Canadian jujube, Chinese ash ash wood, orchid cinnamon, Milan, pomegranate, rubber tree, fig, mulberry, five-colored plum, ivory red (paulownia), Dutch iron, variable leaf wood, Brazilian wood, palm bamboo, wealth tree, big leaf umbrella, Burma gardenia, gardenia Four seasons cinnamon, oleander, Washington palm, palm, wine bottle coconut, broad leaf ten meritorious services, star anise gold plate, Uighur Babbler Yidu Hanao ⒁? India ⒆ limit thin ④ Yuejie ⒏ = ú Chen ㈤ Panao Rose, etc.

Herbaceous flowers include impatiens, canna, alpinia officinalis, red flowers, dahlias, emerald chrysanthemums, bamboo begonia, longevity, marigold, peacock chrysanthemum, fluke, multicolor pepper, rhombus, cockscomb, calendula, Lycoris, Catharanthus roseus, thousand-day red, sulfur chrysanthemum, purple jasmine, hundred-day red and so on. In addition, there are one-leaf orchid, Guangdong evergreen, spring feather, tortoise back bamboo, green apple, silver queen bright silk grass and so on.

Propagation of flowers in the courtyard

1. Sowing in August, the woody flowers that can be sown are: peony, elm leaf plum, safflower oil camellia, summer wax plum, American summer wax plum, Luohansong, etc., which can be sowed as soon as they are picked, or the seeds can be stored in wet sand until the crack is white, and then sow in the ground. Canadelia jujube, it is feasible to store sand to accelerate budding and sow it in bag. After ripening and cracking, the pomegranate was harvested, scrubbed off the fleshy layer outside the seed, and stored in sand until it germinated before sowing. Feasible sowing grass flowers are: Xiacao, fan orchid, petunia, goldfish grass, echinacea, sorrel, thousand-leaf clover, dry golden lotus, pyrethrum and so on. The greenhouse flowers that can be sown are: Baobao flower, cyclamen, melon leaf chrysanthemum, four seasons begonia, four seasons report spring, colorful leaf grass, calendula and so on.

2. The cutting adopts the mixed substrate of alkaline rice bran ash and wet fine sand, which is prepared according to the proportion of 2 ∶ 1, for moisturizing bed or pot cutting. The following species of flowers and trees can be propagated: firethorn, ten meritorious species, wintersweet, Michelia, leaf flower, paulownia, Milan, rhododendron leaf coral, Qionghua, snowball, Fusang, jasmine, pearl orchid, rubber tree, Galo, Luohan pine, goose palm firewood, plantain, eight immortal flowers, purple magnolia and so on. Yellow soil, sandy soil and other substrates can be cut into yellow poplar, pomegranate, hibiscus, French holly, Phnom Penh privet, red leaf Berberis, bamboo, fig, oleander, crape myrtle, June snow, Spiraea, snow spray, gardenia and so on. In addition, a bunch of red, thousand-day red, marigold, sulfur chrysanthemum and other grass flowers, can also be cut this month.

3. Grafting in August, the following flowers and trees can be grafted: in the north, tassel is used as rootstock, sweet-scented osmanthus is grafted, Magnolia magnolia and Magnolia magnolia are used as rootstocks, Magnolia magnolia and Magnolia magnolia are used as rootstocks, Magnolia magnolia is used as rootstock, Magnolia magnolia is grafted by Magnolia grandiflora, and current seedlings of hairy peach are used as rootstocks to graft plum blossom, green pe Wild rose and pink rose were used as rootstocks, excellent varieties of Chinese rose were budded, seedlings of bauhinia, Huahong and Hubei begonia were used as rootstocks, Xifu Begonia and Tripterygium were sprouted, red maple and feather maple were grafted with green maple as rootstock, red maple and feather maple were grafted with single rubber tree as rootstock, camellia was grafted with single camellia as rootstock, fine varieties of camellia were grafted with single camellia as rootstock, wax plum was grafted and grafted by grafting. In addition, wisteria can be propagated by split grafting.

4. Crimping August The ornamental plants that can be reproduced by pressing are: honeysuckle, Lingxiao, woody, Fujimoto rose, brocade flower, eight immortal flowers, Qionghua, snowball, oleander, gardenia, broom, spring, Admiralty, pedicel begonia, weeping begonia, Xifu begonia, sweet-scented osmanthus, purple magnolia, jasmine, pearl orchid, Michelia, Fusang, Luohan pine, coral tree, rubber tree (high pressure), Milan (high pressure), red maple (high pressure) and so on.

5. In August, the ornamental plants that can be propagated are: auspicious grass, hairpin, purple calyx, cherry angel, many green emperors, pineapple, magnolia, one-leaf orchid, umbrella grass, water mass flower, red (green) gemstone, iris, shoot dry, purple triangle leaf sorrel, Guangdong evergreen, Dutch chrysanthemum, calamus, kidney fern, silver silk grass, taro, synthetic taro, twelve volumes and so on. In addition, Lycoris radiata, calla lilies and freesia can also be planted this month. Management of flowers planted in courtyard

1. Transplanting some flowering shrubs with large soil balls and intensity pruning in August, the management of shading, watering and spraying should be strengthened after transplanting, and a higher survival rate can be obtained. Such as Golden Leaf Privet, Red Leaf Berberis, Platycladus orientalis in Phnom Penh, Golden Heart (side), Yellow Poplar, Hypericum, Ten Gongfu, Illicium platinum, Rose, Rhododendron, Gardenia jasminoides, Luo Han Song, smile, Dragon Cypress Ball, Shu juniper Ball, Yellow Poplar Ball, Pomegranate, hibiscus, Peach Leaf Coral, French Holly and so on. In the courtyard, you can also transplant fixed grass flowers, such as a string of red, thousand-day red, marigold, cockscomb, peacock grass, longkou flower, etc., which are expected to bloom in September and October.

2. Pruning in August, the hedges in the courtyard, such as boxwood, lobular privet, privet, golden leaf privet, French holly, spinulosa heather, etc., should continue to be pruned. Balls planted on the ground, such as heather, dragon cypress, Shu juniper, bayberry, pyracantha, Haitong, wolfbone, holly, etc., must also be pruned. For flowers and trees that bloom continuously for a long time, such as rose, pomegranate, hibiscus, crape myrtle, Fusang, triangular plum, five-color plum, etc., the residual flowers should be picked in time, and the branches and tips should be appropriately shrunk. Grass flowers planted on the ground, such as a string of red, thousand-day red, early chrysanthemum, peacock chrysanthemum, marigold, etc., should be topped and picked from the heart.

3. Watering in August, watering and spraying management should be strengthened for flowers and shrubs transplanted in spring and grass flowers planted in spring. Plants with grass ropes tied to the trunk should be sprayed wet to ensure that the plants do not wilt new shoots and young leaves. Spray more water and water carefully to ensure that the roots do not accumulate water.

4. Fertilize the safflower planted on the ground in August? Wood, Phnom Penh (heart) boxwood, red leaf Berberis, golden leaf privet, purple leaf dwarf cherry, variable leaf wood, red mulberry, sprinkled golden peach leaf coral, flower leaf colorful alpinia officinalis, etc., in order to keep its leaf color bright for a long time, quick-acting fertilizer with a balance of nitrogen, phosphorus and potassium should be applied. For species that continue to bloom, such as rose, cinnamon, cinnamon, pomegranate, hibiscus, crape myrtle, leaf flowers, dahlias, and five-colored plums, as well as those that will bloom, such as sweet-scented osmanthus, chrysanthemum, hibiscus, autumn peony, etc., we should promptly apply an appropriate amount of available phosphorus and potassium fertilizer. For camellia, tea plum, plum blossom and wax plum which are in flower bud differentiation, a small amount of potassium dihydrogen phosphate can be sprayed by foliar topdressing.

5. Disease and pest control in August, scale insects on cedar, privet, Haitong, sweet-scented osmanthus, crape myrtle, heather, camellia and other plants should be promptly sprayed with 1500-fold solution to control. For chrysanthemum tigers and aphids planted on the ground, 1000 times of trichlorfon crystal can be sprayed to kill them. The larvae such as rose leaf wasp and Spodoptera litura that ate rose leaves were promptly sprayed with 1000 times of fenvalerate to control.

6. In August, the woody flower species that can collect seeds are: peony, elm leaf plum, safflower oil tea, Luohan pine, summer wax plum and so on. The grass flowers that can collect seeds are: peony, sunflower, purple jasmine, Fulukao, Lingcao, alpine snow and so on. Management of potted flowers in courtyard

1. Watering in August should be between 9 and 10:00 in the morning and after 4 o'clock in the afternoon to keep the water temperature basically consistent with the soil temperature and air temperature. For those ornamental plant species that like acidity, 0.1% ferrous sulfate can be added to the irrigation water. It is worth noting that for ornamental plants with dense hairs on their leaves, such as Baobao, Tripterygium, Tripterygium, Begonia, etc., the leaves are not easy to evaporate after droplets, which can easily lead to leaf rot, and only a small amount of spray is feasible; the flower buds of Fulang flower (African chrysanthemum) and the leaf center of Magnolia can not be drenched with water, and the flow of dirty water into the leaves will cause heart damage. Pineapples must be watered less, sprayed more, and injected water into the leaf tube in order to meet their needs. When watering and spraying potted plants this month, you must pay attention to loosening the soil, but every 10 days, otherwise it will lead to pot soil hardening due to repeated watering. For dormant and semi-dormant flower species, watering and spraying should be controlled to keep the basin soil slightly moist, and a relatively cool environment can be created by spraying water around the flowerpot.