Ginger Rhizome Rot Disease refers to the decay of ginger rhizomes caused by pathogens such as fungi (Pythium spp., Fusarium spp.) and bacteria (Ralstonia spp.). These microorganisms attack the rhizomes, leading to softening, foul odors, and reduced plant growth. Poor drainage and waterlogging often exacerbate the disease.
Symptoms of Rhizome Rot of Ginger
Recognizing the symptoms early is crucial to stop the disease's progression. The key symptoms of rhizome rot of ginger include:
- Yellowing and Browning of Leaves: Lower leaves dry out and turn brown, gradually affecting the whole plant.
- Stunted Growth: The plant's growth slows down significantly.
- Complete Shoot Drying: All above-ground shoots dry out completely, indicating severe infection.
- Rotting of Rhizomes: Rhizomes become soft, water-soaked, and develop brownish patches.
- Foul Odor: A distinctive bad smell emanates from the decaying rhizomes.
- Tissue Breakdown: Severe tissue damage is observed in infected rhizomes.
- Water-Soaked Areas: Infected areas become wet and mushy, spreading rapidly.
Causes of Ginger Rhizome Rot
The primary causes of rhizome rot of ginger are:
Pathogens:
- Fungi: Pathogens like Pythium spp. and Fusarium spp. thrive in humid and waterlogged conditions.
- Bacteria: Ralstonia solanacearum infects vascular tissues, resulting in soft rot.
Infected Rhizomes:
- Using untreated or infected rhizomes as planting material introduces the disease into the field.
Control Measures for Ginger Rhizome Rot
Preventing and managing ginger rhizome rot requires an integrated approach. Here are some effective strategies:
1. Chemical Control
- Katyayani Samartha Carbendazim 12% + Mancozeb 63% WP - 500gm/acre
- Katyayani COC 50 - Copper Oxychloride 50% WP - Dosage: 500gm/Acre
- Katyayani KTM Thiophanate Methyl 70% wp - Dosage - 500gm/Acre
2. Biological Control
- Katyayani Hattrick Trichoderma harzianum1% WP - 1-2Kg/acre
- Katyayani Striker Pseudomonas fluorescens - 1-2Kg/acre
Conclusion
Ginger Rhizome Rot is a serious threat to ginger farming, but it can be controlled with early diagnosis, proper chemical and biological treatments, and good agricultural practices. By adopting methods like seed treatment with Trichoderma and using fungicides like Katyayani Dr Blight, farmers can protect their crops and ensure better yields.
FAQs About Ginger Rhizome Rot
Q. What is ginger rhizome?
A. Ginger rhizome is an underground modified stem that bears nodes and internodes. It is commonly used for propagation and is the edible part of the plant.
Q. What is rhizome rot of ginger caused by?
A. It is caused by pathogens like Pythium spp., Fusarium spp., and Ralstonia spp. in waterlogged, humid conditions.
Q. How can I treat rhizome rot of ginger?
A. Use fungicides like Katyayani Dr Blight and bio-control agents such as Trichoderma for effective treatment.
Q. Can rhizome rot be prevented?
A. Yes, by ensuring proper drainage, using healthy planting material, and rotating crops, you can significantly reduce the risk of rhizome rot.
Q. What is rhizome maggot of ginger?
A. Rhizome maggots are pests that attack ginger rhizomes, causing damage and increasing susceptibility to diseases like rot.
Writer Name - Nitika Chourasiya
