Analysis of the Causes of Dead Ginger Seedlings and Preventive Measures
During the cultivation of ginger, dead seedlings can occur, which can seriously cause the ginger to be cut down and bring huge economic losses to farmers. So what causes dead ginger seedlings? How should they be prevented? Let's take a look at the detailed introduction with the editor.
1. Ginger blast disease
Many seeds have not undergone disinfection measures and will carry a large number of pathogens that invade when the seeds germinate, and seedlings have weak resistance, so they are extremely susceptible. Or the soil has not undergone strict disinfection and sterilization measures, and pathogens will also invade when the seeds sprout, resulting in dead seedlings.
Preventive methods: After harvesting the seed ginger, sun-dry it for a few days, then place it in a 20-30 degree environment for a week to allow the wounds to heal and reduce the occurrence of ginger blast. Before planting, soak it in borax solution, carbendazim, and captan for 15-20 minutes to thoroughly eliminate the pathogens. When planting, avoid continuous cropping, and combine land preparation with applying 75-100 kg of quicklime per mu for disinfection. If diseased plants are found, remove them promptly and scatter quicklime near the diseased holes.
2. Improper fertilization
Many farmers believe when planting that the more fertilizer applied, the higher the yield, so they blindly apply chemical fertilizers, favor nitrogen fertilizer, and apply fertilizer in a concentrated way, causing fertilizer damage to ginger and, in severe cases, dead seedlings.
Preventive measures: Ginger fertilization should be based mainly on decomposed farmyard manure. Generally, apply 3000 kg of farmyard manure, 30 kg of superphosphate, and 15 kg of potassium fertilizer per mu as base fertilizer. For later topdressing, use organic fertilizer as the main component, paired with an appropriate amount of chemical fertilizer, to increase soil organic matter content and promote rhizome expansion.
3. Waterlogging damage
When watering too much or when drainage is not carried out in time after rain, the soil is very prone to caking into blocks and causing waterlogging damage. Under high-temperature and high-humidity conditions, the rhizomes are very prone to rot, leading to dead seedlings.
Preventive measures: When planting, choose soil with deep soil layers, good permeability, and good drainage. Do not plant on clay soil. During land preparation, dig drainage ditches well to ensure smooth drainage. Do not water too much at one time, and drain promptly after rain.
4. Ginger stem borer
The ginger stem borer, also known as the heart-piercing worm, is an omnivorous pest that can cause damage from seedling emergence until harvest. It damages by larvae boring and feeding. After hatching for 2-3 days, the larvae invade from the gaps between the leaf sheath and stem or from the heart leaf, continuously boring upward and feeding, causing the stem to become hollow, blocking the transport of water and nutrients, and over time leading to plant death.
Preventive measures: Manual capture can be used. Because the ginger stem borer is a boring pest, chemical control is not very effective against it, and older larvae have strong resistance, so manual capture is advocated.
The above is an introduction to the causes of dead ginger seedlings and preventive measures. We hope it can help you. If you want to learn more related knowledge, please stay tuned to us.