Sorghum Diseases: how to Control the causes of Sorghum sheath Blight

What is the cause of sorghum sheath blight? What are the symptoms? Let's take a look at how to prevent and cure it.

Symptoms: mainly harm to leaves, stem base. The leaf sheath near the earth, the primary white-green water-immersed small disease spot, and then expanded into an oval, brown around, lighter in the middle. The disease spot of the leaf is gray-green or gray-white cloud-like, and most of the disease spot fuses into a tiger spot, which makes the whole leaf die.

Pathogenic ecology: the residue of pathogenic bacteria exists in plant residue or soil, and sclerotia can be transmitted by irrigation water or wind. After sclerotia germinated, the hyphae invaded the stem of the host. When the host is growing down, it is more susceptible to disease, and it is most likely to occur in warm and rainy climate. Poor ventilation and drainage in the field can increase the severity of the disease.

Prevention and control methods:

16.5% anti-grain emulsion: 0.4-0.5 liter; at the beginning of the disease spot before the rainy season or before heading, apply it for the first time, then once or twice every 14 days. The medicine should be sprayed at the base of the stem.

6.5% ferric ammonium arsenate solution: 0.4-0.5 liter

8% methyl calcium arsenate wettable powder: 0.6-0.8 kg