The basic introduction of the old man s sunflower and the cultivation technique of the old man s sun

Old man Aoi. It is a very thick tree plant, and it also grows very tall, can grow to a height of more than 20 meters, and its branches and leaves are very dense and slender, like a banana fan. The old man sunflower is native to Mexico, the United States and other countries, and later introduced into our country, in many areas of our country have been planted, the old man sunflower likes to grow in a warm and humid environment, it has no requirements for the soil environment, but it may grow faster if it grows in fertile and loose soil, we generally plant it in a relatively high terrain area, if it grows in a low-lying or high groundwater level for a long time, it may cause the branches and leaves of the old man sunflower to fall off or rot roots.

The old sunflower is more sensitive to light, and it can grow fast and well in an environment with good light conditions and long sunshine hours, and it will lead to short plants in a dark state for a long time. In the growth process of the old sunflower, it is necessary to prune it from time to time, mainly to prune off a certain number of old branches and diseased branches, so as to increase the light transmittance of the old sunflower and promote the growth of new branches.

The elderly like a warm, moist, sunny environment; It is cold-tolerant, and will not cause frost damage at a short low temperature of minus 5 °C; It is more drought-tolerant and barren-tolerant soil, and should not be cultivated in high temperature and high humidity. According to the current poor growth of some elderly sunflowers, the following maintenance plans are proposed: Under warm and humid conditions, old sunflowers grow rapidly.

The newly transplanted old sunflower has an underdeveloped root system and limited ability to absorb nutrients, while it grows rapidly, resulting in low nutrient accumulation in the body and poor ability to resist diseases and pests. Pests and diseases are easy to infect, such as turtles, weevils, and caterpillars; Diseases: heart rot, blight, etc.

Due to the tender tissue, the insect pest disease invades quickly, and the disease is serious, so it must be prevented and controlled in time. Generally, 78% Kebo 500-600 times, 80% mancozeb 600 times for disease control, with 50% phosphine or 75% sulfur dimetoxyl for pest control, specific operation, can be sprayed with fungicides or foliar fertilizers, but the concentration must be controlled, avoid high temperature, avoid pesticide damage, fertilizer damage. For plants that have been pests and diseases, use 150-300 times liquid insect thread cleaning for core filling.

Old man Aoi. Also known as the Washington Palm, it is an excellent tree species for greening. It is generally used as a street tree, and can be planted on both sides of the road to form a beautiful landscape, or it can be planted alone in the garden.

It is a plant from the tropics, it likes to grow in a sunny environment, and it is more suitable for cultivation in loose and thick sandy soil. We need to remove weeds from the soil before planting, and then turn over the soil to make it soft. Depending on the size of the plant, dig a hole of the right size in the soil, apply some base fertilizer to the bottom of the hole, and then cover it with a layer of soil.

When we are in the later stage of maintenance, we can water it once in about four or five days to keep the soil slightly moist and not have water accumulation. In the summer, the water of the plant evaporates relatively quickly, and we can increase the frequency of watering appropriately to avoid the lack of water due to high temperature, which will affect its normal growth.

Prefers warm, humid and sunny environments. It is more cold-tolerant and will not cause frost damage at a short low temperature of -5 degrees. Relatively drought tolerant and barren soils. It should not be cultivated in high temperature and high humidity.