Because the magnolia tree grows tall, its leaves are wide and dense, which will produce powdery mildew. In addition, magnolia is easy to get insects and attract mosquitoes, so it is not suitable for domestic use.

Extended data:

First, powdery mildew

Powdery mildew can occur from seedling stage to heading stage. Yellow spots began to appear on the leaves, and then expanded into round or oval lesions with a white powdery mildew layer on the surface. Generally, there are more lower blades than upper blades, and there are more behind blades than in front. The mildew spots are scattered separately in the early stage, and then combined into a large mildew spot, which can even cover the whole leaf, seriously affecting photosynthesis, interfering with normal metabolism, causing premature aging and yield loss.

Second, the growth environment of Magnolia grandiflora

Magnolia is suitable for growing in warm and humid climate and fertile and loose soil, and likes light. If you don't resist drought and waterlogging, your roots will die after being flooded for two to three days. Sensitive to sulfur dioxide, chlorine and other toxic gases, poor resistance.

Third, the daily management methods of Magnolia grandiflora

(1) plastic trimming?

Magnolia grandiflora is carried out after flowering and before leaf bud germination. Generally not trimmed. Because of the poor healing ability of magnolia branches, there is no need for big plastic pruning, just cut off dense branches, clustered branches, cross branches, dead branches and insect branches to cultivate a reasonable tree shape and make the posture beautiful. When the anti-corrosion film is directly coated on the cutting saw wound, it can quickly form a tough soft film close to the wood, protect the growth of wound healing tissue, prevent the infection of rotten bacteria, prevent soil and rainwater pollution, prevent freezing and prevent the wound from cracking.

(2) flowering regulation?

If Magnolia grandiflora wants to blossom on New Year's Day or Spring Festival, potted Magnolia grandiflora can be moved into a low-temperature greenhouse 40-50 days in advance to gradually break the dormant state. After 25 ~ 30 days, put it in a high-temperature greenhouse, keep the air humidity above 60%, and spray Hua Zhuang Di Ling, then it will bloom, which can promote the bud to be strong, the petals to be hypertrophy, the flowers to be gorgeous, the flowers to be rich and the flowering period to be prolonged. How to make potted magnolia large, flowery, fragrant, gorgeous and long, the key is to strengthen the flowering management of potted magnolia.

(3) Applicable value?

After seasoning, it is mixed with magnolia petals, flour and sugar and fried in an oil pan, which becomes a delicious snack. If japonica rice is cooked in a pot until porridge is made, adding appropriate amount of Flos Magnoliae petals, hawthorn and honey to make porridge will make the food sweet and sour, and make you keep fit and improve your eyesight. If the petals of Magnolia grandiflora are washed and dried, kneaded into balls with equal amount of white sugar and sealed in bottles, they can be used as ingredients for various health candy or steamed cakes.