Ginger requires a significant amount of fertilizer, and in addition to the base fertilizer, timely top-dressing is essential. During the germination period, no additional fertilizer is needed. Once the seedlings reach about 30 cm in height, one round of seedling fertilizer should be applied, using 1-2 branches. The recommended application rate is 20 kg of ammonium sulfate or diammonium phosphate, or 30 kg of potassium sulfate compound fertilizer. For the first top-dressing, mix 75 kg of Mushi cake fertilizer with 50 kg of compound fertilizer and apply it together with the soil. After that, combine the first and second layers of soil with watering. In case of heavy rain, you can apply 50-100 grams of chemical fertilizer per plant directly beside the ginger rhizome during the rainy season.
To encourage root elongation and improve the quality of the ginger, cultivate the soil 3-4 times according to the growth conditions. When the ginger starts to sprout, perform the first weeding and repeatedly apply fertilizer and water. The soil should be loosened by digging around the plants. After each earthing-up, deepen the ditches at the same time, which helps with drainage and air circulation. Ginger thrives in a moist environment but is also very sensitive. Therefore, it's important to maintain clean trenches, ensuring that the field is dry when there is no rain and not overwatered otherwise.
Common diseases affecting ginger include rot disease (also known as ginger aphid disease) and leaf blight. Pest problems mainly involve corn borers and hopworms, which need to be controlled promptly through spraying. Disease outbreaks typically begin in June, especially under high temperature and heavy rainfall conditions. Prevention focuses on integrated agricultural practices such as crop rotation and careful selection of healthy seeds. Infected plants should be removed immediately, along with nearby healthy plants within a 0.5-meter radius, and the infected soil should be replaced. Apply 1 kg of lime around the affected areas, and use a solution of 50% carbendazim diluted 500 times, or 72% agricultural streptomycin soluble powder diluted 3000-4000 times, to water the roots. Alternatively, you can use 50% Dyson ammonium 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 gradually turns brown and necrotic. The lesions spread from the veins outward, forming brown to reddish-brown margins with wavy edges. Early control measures include spraying 25% carbendazim WP at 600-800 times dilution, or a 1:2:200 Bordeaux mixture, or 70% zineb at 600 times dilution. Repeat the treatment every 15-20 days for 2-3 applications depending on the severity.
Be especially cautious during July when heavy rains are common, and ensure proper drainage to avoid waterlogging.
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