Why does garlic mildew? How to prevent the appearance of moldy garlic?

Many garlic growers have encountered garlic rust to some extent. Some years are serious, and some years are mild. Rust is one of the common diseases in garlic growth. In fact, it is not only garlic, but also other vegetables, such as green onions and leeks. Rust of onion and garlic vegetables has become a headache for many growers.

The direct harm of garlic rust is that leaves will form round or oval summer spores on the surface of leaves, which are convex. When these spores are broken, they will have yellow powder, which is the spore in summer. You can see the specific shape. Some people describe it as rust, so it is called rust. This explanation is quite intuitive and can be used as a reference.

Garlic rust is serious, what is the main reason? How to prevent and control?

Garlic rust not only directly harms leaves, but also affects garlic if it is not prevented in time, which not only affects the yield, but also reduces the quality. As Wang said at the beginning, some years are serious and some years are slight. The main factor is the weather. When it rains in a certain year, the corrosion will be more serious, especially in the weather with long-term continuous rain.

Some people may ask, will the pathogen of garlic rust survive in winter? This is inevitable. When rust fungi (mainly summer spores) encounter winter, they will survive on diseased tissues left in the fields, other plants or some garlic left for planting. In the second year, when the temperature is right, it begins to breed again and again. At present, garlic rust has become the focus of prevention and control, and the main measures are as follows:

1. Mixed planting of onion and garlic is not recommended to reduce mutual infection of bacteria. If the illness is particularly serious, you can rotate the seeds.

2. It is not recommended to flood when watering. At the same time, fertilization should be reasonable to avoid partial application of nitrogen fertilizer.

3. After garlic is harvested, it is necessary to clean up the fields, especially those with serious rust, and remove some residual leaves, so as to avoid aggravating the damage in the coming year.

In addition to prevention, some friends are most concerned about the prevention and treatment of garlic rust. Let's talk about the commonly used drugs in the market: triadimefon, myclobutanil, difenoconazole, azoxystrobin and so on. (and others), you can also use compound drugs, such as commonly used benazoxystrobin and epoxiconazole azoxystrobin. According to the severity and resistance of local corrosion. If ever,