What are the specific drugs for scab?

Scab is a common disease during crop growth. This disease occurs in pepper, potato, taro, peanut, tomato, citrus and so on. When it is serious, it will affect the yield. What are the specific drugs for scab?

First, what are the specific drugs for scab?

The specific drugs for scab are Bordeaux solution, copper oxychloride, chlorothalonil, tuobuxide, and so on. Generally, before the onset of the disease, you can spray 30% copper oxychloride 500 times, or 75% chlorothalonil wettable powder 500 times, or 50% chlorothalonil wettable powder 500 times. After the onset of the disease, it can be prevented and treated with internal inhalation fungicides such as 50% tophan wettable powder 600-800 times liquid.

Second, how is scab caused?

Scab is transmitted by wind, rain and insects. The temperature is 16-24 ℃, and the easy occurrence period is 3-5 months. Such as the gathering of disease spots, the leaves will become distorted, the fruit will also become deformed fruit, and the fallen leaves and fruits will be serious. The symptoms of stem pod, melon and fruit, root tuber and tuber were the most obvious. In severe cases, the disease spot is connected into pieces, the fruit is deformed, and the fleshy rhizome is dysplastic. The leaves are distorted and the young plants die, so pregnant women cannot eat this kind of scab food for the sake of their children.

At the beginning, the scab will appear yellow or yellowish green pillow-sized oily spots on the back of the leaves, and then gradually bulge on both sides of the leaves, becoming a nearly round and beige disease class, and soon the epidermis of the disease is ruptured, spongy and prominent. Cork, rough surface, grayish white or grayish brown. After that, the central part of the citrus disease was sunken and cracked in the shape of a crater, and there were fine wheel lines and yellow halos around it. The diameter of the disease class was generally 3-5mm.