How to treat common ginger diseases? A detailed guide to prevention and control methods

Ginger is a common vegetable in daily life, eaten almost every day by every household, and grown in many regions. During cultivation, various diseases can appear. So how do you treat common ginger diseases?

1. Ginger blast

Damage symptoms: Ginger blast is one of the main diseases of ginger. After infection, ginger generally suffers a 20%-30% yield reduction, and in severe cases up to 80%, making it extremely harmful. This disease mainly damages the rhizome of ginger. When it occurs, water-soaked lesions appear on the affected part. As the disease progresses, the lesions turn yellowish-brown and lose their luster, the internal tissues begin to rot, and eventually the plant dies because the roots lose their ability to absorb nutrients.

Prevention and control methods: This disease is mainly caused by infection with pathogenic bacteria, so during planting the seed ginger and soil should be disinfected to eliminate the pathogens, and clean water should be used for watering along with pollution-free fertilizers. When diseased plants are found, they should be pulled up promptly, taken out of the field and burned, and the diseased holes should be disinfected. During an outbreak, agents such as Miejunwei, Genfuling, Dikesong and Junkang can be used as a root drench for control.

2. Soft rot

Damage symptoms: When soft rot occurs, the leaves of ginger turn yellow, gradually shrivel and dry up, and finally the whole plant dies. Usually after infection the root system becomes soft and eventually rots, with a foul odor.

Prevention and control methods:

(1) Carry out reasonable crop rotation; ginger can only be returned to the original field after an interval of more than 3 years.

(2) Select seed carefully; do not keep diseased ginger as seed.

(3) Both base fertilizer and topdressing should place equal emphasis on nitrogen, phosphorus and potassium, especially applying more potassium fertilizer.

(4) In the early stage of ginger soft rot, pull out the central diseased plants as soon as possible, disinfect the holes by sprinkling lime, or use 50% amobam at 1000 times or antibacterial agent 401 diluted 800 times to drench the holes 2-3 times.

3. Leaf spot

Damage symptoms: Leaf spot mainly damages the leaves. When it occurs, spindle-shaped or oblong lesions appear on the leaves. The edges of the lesions are brown and the centers are yellowish-white, and they perforate very easily. In the later stage of the disease, large numbers of small black dots appear on the lesions, and in severe cases the leaves are covered with lesions of various sizes. Its pathogen is Phyllosticta zingiberi, and its infectivity is strong. It can spread with wind and rain, and is likely to occur in warm, humid conditions with dense plants and high field humidity.

Prevention and control methods: Use reasonable crop rotation, avoid continuous cropping, and apply more organic fertilizer to improve the plant's disease resistance. In the early stage of the disease, spray agents such as thiophanate-methyl wettable powder and chlorothalonil wettable powder for control.