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Rotting of ginger plant shoot and the rhizome

Ginger    None Given

My plants are now six months old but some areas of the garden have started drying out and the rhizomes rot completely. Its unfortunate I do not have the photos now but I was advised to start using a chemical called forciphite from Agrozeb. Could there be another alternative chemical I can use to revive my garden?


Posted by: mande sulait (1 point) mande sulait
Posted: March 24, 2016




Answers

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Generally there are three kind of rot diseases common in ginger. They are Bacterial wilt, soft rot and dry rot.

Bacterial wilt caused by Ralstonia solanacearum
1. Initially the infected plants leaf margin turn bronze and curl backward.
2. Later the whole plants wilt and die.
3. The base of the infected pseudostem and the rhizome emit foul smell.
4. If you cut pseudostem and immersed it in a glass of clean water, can see milky exudates of bacteria (ooze test).
Control:
Remove the affected clumps and drench the soil with copper oxychloride 0.2%.

Dry rot is caused by fungus and nematode complex (Fusarium and Pratylenchus sp.)
1. Initially the disease appear in small patches and spreads slowly.
2. Leaves show varying degree of yellowing
3. Older leaves dry up first and spread upwards
4. Infected plants appear stunted and rhizomes become shrunken and dry
5. You can see brownish ring inside cut open rhizomes
Control:
Apply mustard oil cake and Trichoderma

Soft rot caused by Pythium sp.
1. Yellowing of lower leaves followed by upper leaves.
2. Rhizomes show brown discoloration (rotting)
3. The pseudostem comes off easily with a gentle pull
4. Disease favored by water logging conditions
Control:
Drench the soil with Bordeaux mixture (1%) or copper oxychloride @ 2g/1 liters of water.





Posted by: Dr. Ravishankar Narayana (11 points) Dr. Ravishankar Narayana
Posted: March 24, 2016




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