Understand the law and control sunflower leaf blight in time

With its beautiful shape, it has been welcomed by families and has become a common ornamental plant in the home. However, the improper maintenance of the sunflower will also occur disease, the more common leaf blight is one of them, it makes the ornamental nature of the sunflower greatly reduced.

The leaf blight is a common disease caused by fungi infection, which has a great impact on the growth of horseradish. The light disease will dry the leaves, and the serious disease will lead to the death of the whole plant.

The pathogen infected leaf tip and leaf edge first, brown spots or strip-like patches appeared at the early stage of disease, gradually expanded and connected at the middle stage, and the leaves appeared greyish white and dry at the later stage.

These pathogenic bacteria overwinter on diseased plants or in soil, spread by conidia through wind, rain and watering, and invade from plant wounds. High temperature, high humidity and airtight environment prone to this disease.

Understand the causes and rules of the occurrence of yellow sunflower leaf blight, then we should start from "prevention".

First of all, we should strengthen disease inspection and not introduce diseased plants. This is the most fundamental means of prevention. If a diseased plant is implanted, then the method used later can only be "cure" rather than prevention.

Second, strengthen ventilation. Since high temperature, high humidity and lack of ventilation are pathogenic environments, attention should be paid to avoiding the above situations when planting and breeding Saurian sunflower, strengthening ventilation, reasonable watering and timely heat dissipation.

If it is inevitable that disease will occur, it is necessary to treat it promptly:

1. Avoid rain and spraying during the onset period;

2. Cut off the affected branches and leaves in time to prevent further infection. Apply Dakonin ointment to the wound after pruning;

3. If there is disease, 70% thiophane methyl 800 solution or 75% chlorothalonil 1000 times solution can be sprayed once every 7 to 10 days, and continuous spraying for 3 to 4 times can effectively control the disease.

Scientific planting and breeding of horseradish, can be said to be the most effective way to prevent horseradish blight. And after appearing disease circumstance, seasonable and scientific cure is very necessary.