Do you know these common diseases and insect pests and how to deal with them in flower cultivation? It's time to get to know.

In the process of raising flowers, most flower friends can not avoid the invasion of diseases and insect pests, which will affect the flowering and fruiting of plants, and are more likely to lead to plant death, so what should they do if they need diseases and insect pests?

1. Brown spot

Brown spot usually appears on flowers or fruits, but as the fruit grows up, brown spot will slowly become patches, which is harmful to peony, peony, chrysanthemum, elm leaf plum and so on.

Prevention and control methods: before or during the high temperature and humidity weather, little or no nitrogen fertilizer should be applied, a certain amount of phosphorus and potassium fertilizer should be maintained, series irrigation and flood irrigation should be avoided, especially evening irrigation should be avoided. Spray medicine if necessary.

2. Powdery mildew

Powdery mildew is the most common disease of flowers in the family. Many flower lovers do not necessarily know even if they are infected, mistakenly thinking that plants are causing a layer of dust. in fact, this is a fungal infection, which can never be ignored. generally, it is most common on rose, pumpkin and lilac flowers. this disease is usually caused by high humidity, especially in the Meiyu season, and must be dealt with in time.

Prevention and treatment: if you find the situation of powdery mildew infection, you can use a small teaspoon of detergent to water for a lifetime, and then clean the leaves. If it is more serious, you should cut off the diseased leaves and spray chlorothalonil or methyl thiophanate solution in time.

3. Root rot

This disease comes from the soil, if the soil with bacteria will cause plant disease, infected plants show that the leaves withered, growth will become slow, slowly the whole plant begins to turn yellow until death.

Prevention and control methods: if root rot is found, the plants should be removed in time, the old soil should be removed, the rotten roots should be cut off, the diseased branches of diseased leaves should be removed, and the pots should be put back into the basin after soaking in potassium permanganate solution and raised in a ventilated and shaded place.

4. Late blight

This is a common disease on tomatoes and potatoes. Potatoes and tomato farmers should pay attention to this. Generally, black spots appear on the leaves and fruits of plants infected with late blight, and as the plants grow up, the spots will slowly expand.

Prevention and treatment: this disease is generally caused by cool and humid weather, so do not worry, do not rush to medical treatment, as long as the plants are placed in the sun and well-ventilated places, the late blight will be cured.

5. Black spot

As the name implies, we also know that black spot disease can cause black spots on the leaves of plants. When it spreads, plants will become withered and yellowed. This disease is more common in rose.

Prevention and treatment: if it is in the summer rose infected with black spot, do not immediately prune, because the summer rose is not suitable for pruning, wait until the end of the summer will immediately cut off the branches and leaves of the disease, so as not to spread and induce.

6. Fusarium wilt

Fusarium wilt, which means to wither plants, is common in all kinds of fruits and vegetables, such as tomatoes, chili peppers, peas and melons, which are most likely to happen. when this symptom occurs, the leaves at the top and bottom of the plant will wilt, and then slowly the whole plant will wither.

Control method: when this disease occurs, it must be isolated from normal plants, and then 41% poly-pyrimidine 600-800 times diluted and evenly sprayed, when the disease is serious, the dosage can be increased appropriately.