How to prevent and control sunshine rose lobular disease?

Grape lobular disease is due to zinc deficiency, which can be treated with zinc fertilizer.

Pro, 1) Sunshine Rose is a relatively drought-tolerant plant, but if the leaves are yellow and dry, it may be due to the following reasons: 1. Lack of water: Sunshine Rose grapes need sufficient water to maintain growth, and if the soil is too dry, it will cause the leaves to yellow and dry.

Therefore, the soil should be kept moist by watering at the right time. 2. Insufficient nutrients: If there is a lack of nutrients in the soil, it will lead to poor plant growth and yellowing and dry leaves.

Appropriate amounts of organic fertilizer or compound fertilizer can be added to the soil to supplement nutrients. 3. Pests and diseases: Sunshine Rose grapes are susceptible to some pests and diseases, such as aphids, powdery mildew, etc., which will cause the leaves to turn yellow and dry the base to dry the tuber.

Pesticides can be used to control pests and diseases. 4. Insufficient light: Sunshine roses need sufficient sunlight for photosynthesis, and if the light is insufficient, it will cause the leaves of the bridge to turn yellow and dry.

Therefore, it should be planted in a location with plenty of light. 2) In view of the above situation, the following measures can be taken: 1. Watering in a timely manner to keep the soil moist.

2. Add an appropriate amount of organic fertilizer or compound fertilizer to the soil to supplement nutrients. 3. Use corresponding pesticides to control pests and diseases. 4. Choose a sunny location for planting.

Phylobite disease of the moon flower.

Lobular disease is a common physiological disease in the northern lunar season. Here's how to prevent it. Leaf disease occurs on young branches and leaves, and is more pronounced in spring when it sprouts.

The diseased branches germinate late, and the leaves are narrow and slender, hard and brittle, with upward edges, light yellow-green, and uneven color. The tip of the new shoot is slender, the internodes of the branches are short, the thin leaves are clustered and rosette-shaped, and the diseased branches are weak. The disease mostly occurs in the whole plant.

The pathogenesis of lobular disease.

Rose lobular disease is caused by a deficiency of zinc, an essential element in auxin synthesis. When zinc is deficient, the amount of free and bound auxin is significantly reduced, leading to growth arrest. Low levels of zinc in the soil or imbalances of other trace elements can easily cause zinc deficiency.

Symptoms of zinc deficiency occur when the zinc content in the leaves is less than 10-15 ppm.

Prevention and control methods of lobular disease.

According to the local soil fertility, appropriate application of organic fertilizer and trace elements to improve the soil. In spring and autumn, basal fertilizer and zinc sulfate are applied in combination. In the rose garden where zinc is deficient due to insufficient copper or magnesium, magnesium and copper-containing compound fertilizers should be applied at the same time to achieve obvious control effects.

In early spring, zinc sulfate is sprayed on the branches of rose buds, 1-2 times a year; Spraying 300 mg of zinc naphthenate before flowering, and spraying zinc sulfate plus urea or 300 mg kg of zinc naphthenate or 300 times zinc amino acid solution after flowering can significantly reduce the disease.