How to Treat Sand Ginger Diseases? A Detailed Guide to Prevention and Control Methods

Sand ginger is an annual herbaceous plant. It has a distinctive aroma and is mainly used to promote the flow of qi and warm the middle, aid digestion, and relieve pain. It is used for chest and diaphragm distension and fullness, cold pain in the stomach and abdomen, and indigestion. When growing sand ginger, common diseases include ginger blast and leaf blight. So how do you treat sand ginger diseases?

1. Ginger blast

Ginger blast, also called rot disease, is a root and rhizome disease caused by bacteria. In the early stage of the disease, the roots begin to rot, then it gradually spreads to the rhizome, and next the upper leaves wither and fall off. Finally, most or all of the roots and rhizomes rot, giving off a peculiar foul odor.

Prevention and control methods: Choose a sunny, sandy plot with loose soil and good drainage for planting, and avoid continuous cropping. Select disease-free rhizomes as seed stock. Before planting, soak the seed stock for 10 minutes in a 20% wood ash extract or 1:1:100 Bordeaux mixture for disinfection. During the rainy season, strengthen field drainage and inspect promptly. If diseased plants are found, remove them in time and sprinkle lime powder on the diseased planting holes to prevent the spread of the pathogen. In the disease season, spread wood ash or lime around the plants, then loosen the soil; this has a certain preventive and control effect.

2. Leaf blight

Leaf blight is a leaf disease caused by fungi. It generally starts from the leaf tip and leaf margin, then spreads outward. The lesions are oval or irregular, grayish-white in the center, with a distinct brown line at the edge. In severe cases, the entire leaf dries up and dies.

Prevention and control methods: Before the disease occurs, spray 1:1:100 Bordeaux mixture for prevention, once every 10 days, for 2--3 consecutive sprays. After the disease occurs, promptly remove infected leaves, deep-bury or burn the diseased leaves, and spray with 50% amobam 500--600 times dilution, or 50% Tuzet 500 times dilution, or 75% chlorothalonil 500--600 times dilution, once every 7 days, for 2--3 consecutive times.

It is cultivated in Taiwan, China, Guangdong, Guangxi, Yunnan and other provinces and regions. It is also found in South Asia to Southeast Asia, and is often cultivated for medicinal or seasoning use.