Ginger requires a significant amount of fertilizer, and in addition to the base fertilizer, it's important to apply additional nutrients at the right time. During the germination stage, no top dressing is needed. Once the seedlings reach about 30 cm in height, you can apply the first round of seedling fertilizer, which should cover 1-2 branches. The recommended dosage is 20 kg of ammonium sulfate or diammonium phosphate, or 30 kg of potassium sulfate compound fertilizer. For the first topdressing, combine 75 kg of Mushi cake fertilizer with 50 kg of compound fertilizer and mix it into the soil around the ginger plants. After that, each subsequent topdressing should be mixed with watering. If there's heavy rain, you can apply 50-100 grams of chemical fertilizer per plant directly beside the ginger nest during the rainy periods.
To encourage root elongation and improve the quality of the ginger, it's recommended to cultivate the soil 3-4 times depending on the growth conditions. When the ginger starts to sprout, perform the first weeding and then water and fertilize the soil several times. The process involves digging up the soil and mounding it around the base of the plants. Each time you do this, deepen the ditches at the same time, which helps with drainage and air circulation. Ginger thrives in a moist environment but is also sensitive, so regular field maintenance, such as cleaning the ditches, is essential. Ensure that the field is dry after rain and avoid overwatering.
Common diseases affecting ginger include rot disease (also known as ginger aphid disease) and leaf blight. Insect pests like corn borers and hop aphids should be controlled promptly through spraying. Disease outbreaks usually start in June, especially under high temperatures and heavy rainfall. To manage these issues, use integrated agricultural practices such as crop rotation, selecting healthy seeds, and removing infected plants immediately. Also, remove all healthy plants within 0.5 meters of the diseased ones and replace the contaminated soil. Apply 1 kg of lime around the affected areas and treat the roots with a solution of 50% carbendazim diluted 500 times or 72% streptomycin sulfate dissolved 3000-4000 times. Alternatively, use 50% dichlofluanid at 800 times dilution or 50% DT wettable powder at 500 times dilution to prevent further spread.
Leaf blight initially causes yellowing of the leaves, which then turns brown and necrotic. The lesions start from the veins and spread outward, creating wavy, dark brown edges. Early control measures include spraying 25% carbendazim WP at 600-800 times dilution, 1:2:200 Bordeaux mixture, or 70% mancozeb at 600 times. Repeat the treatment every 15-20 days for 2-3 applications, depending on the severity.
Be sure to watch out for heavy rains in July and drain the fields promptly to avoid waterlogging.
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