Last time, we introduced the maintenance method of orchid in summer. However, the maintenance of orchids in autumn can not be ignored. Autumn is another golden season for orchid cultivation. Orchid Growers should grasp the characteristics of autumn climate, and focus on adjusting light, changing pots and plants, supplying fertilizer and water, and eliminating pests. Let's learn the maintenance method of orchid in autumn!
The methods of orchid bud strengthening were as follows: 1.
Autumn sunlight can enhance the ability of orchids to resist diseases, insect pests and severe cold. Therefore, in autumn, we should try to reduce the shading degree, let orchids receive more sunlight, open the windows of orchid room at night, let them fully ventilate, and increase the temperature difference between day and night. Orchid breeders all know that increasing orchid light and temperature difference in autumn is a shortcut to promote buds and seedlings. Where there is more light in nature, orchids bloom more, which also shows this point.
2. Water and fertilize.
In the autumn of drought and rain, watering and moisturizing should be paid more attention, such as low humidity can be sprayed to keep the environment moist and prevent the orchid leaves from dying. After growing in summer, most of the nutrients in the basin have been exhausted. Therefore, more attention should be paid to supplement fertilizer in autumn. The method is topdressing organic fertilizer, once every 10 days, Foliar Spraying Nitrogen fertilizer, also once every 10 days, the two can alternate. In addition, when organic fertilizer is applied to the root system, some phosphorus and potassium fertilizer can be added. Phosphorus fertilizer can promote the growth of orchid plants and the differentiation of flower buds. For example, the plants are difficult to blossom due to the lack of phosphorus in the plant materials. Generally, 0.2% to 0.3% potassium dihydrogen phosphate solution can be sprayed on the leaves, once every 5 to 7 days, 2 to 3 times in a row. The fertilization time should be in the sunny evening when the planting material is slightly dry and the temperature is lower than 30 ℃. The next morning should be watered once in time to keep the basin soil moist and not waterlogged.
Orchid fertilization
3. Pruning and finishing.
For the flowering Cymbidium in summer and autumn, the flower branches should be cut off in time after flowering and the nutrients should be supplemented to strengthen the cymbidium plant. For the orchids that are growing luxuriantly and haven't changed the pots, the leaves should be sorted out in time. If the plants are too dense, some weak plants and diseased plants can be properly removed, and the diseased leaves, dead branches and burnt tail leaves can be cut off to promote the balanced and healthy growth of orchids and maintain their ornamental value.
4. Change the pot by plant.
Orchids are limited by flowerpots. The vigorous root groups are crisscross and difficult to extend, and constantly arch to the basin surface, which makes it difficult to water and fertilize. There are too many plants in the basin, which are not only vulnerable to diseases and insect pests, but also very unfavorable to the growth of orchids. In the face of this kind of situation, we can change the pots. Summer orchid and autumn orchid in late October to mid November is the appropriate period for basin change. When changing pots, turn out the mother plant, gently remove the mud, separate according to the natural plant, trim the broken roots and leaves, and pay attention not to touch the leaf buds and fleshy roots. Wash the roots in a basin, and then put them in a cool place.
Orchid pruning and finishing
5. Pest control.
Autumn climate is suitable for the occurrence of various diseases and insect pests. Red spider, scale insect and grub are the main pests of orchid. A small number of scale insects can be removed by brush. When the quantity is large, 40% dimethoate 800-1000 times liquid spray can be used to prevent it. If the red spider is not controlled in time, it can make the blue leaves lose green and scorch. It can be eliminated by spraying 500-600 times of the non pollution pesticide green Ying. The grubs that sneak into the flowerpots will eat the fleshy roots of orchids, and the plants will wilt if they are seriously damaged. The grubs can be controlled by irrigating the roots with 5% phoxim 1000 times solution, 150 ml to 200 ml solution each time. In addition, autumn is also a high season for orchid soft rot, stem rot and black spot. Alternatively, fungicides such as streptomycin, chlorothalonil and methyl tozin can be sprayed.
Soft rot of orchid