Question

Which of the following disease in plants is caused by a bacteria?

1. Stalk rot in Maize
2. Brown rot of Peach
3. ​Damping-off in citrus
4. Leaf curl in tomato

Answer 1

Correct Answer - Option 1 : Stalk rot in Maize

The correct answer is Stalk rot in Maize.

• Stalk rot in maize is a Bacterial disease caused by Erwinia carotovora.

 

1. Symptoms:

• The stalk near the ground become water-soaked with brownish dis-colouration and are easily breakable. 
• The rotting tissues emit a putrid smell.
• Infected plants show dark colour and water soaking at the base of the stalk. 
• Plants die shortly after tasseling.
• The bacterial decomposition produces an unpleasant odor.

 

2. ​Management:

• ​Bleaching powder containing 33% chlorine @ 10 kg/ha as soil drench at pre-flowering stage.
• Planting crop on ridges. 
• Avoid water logging and proper drainage.

 

Damping-off in citrus	Fungal disease caused by Pythium spp, Rhizoctonia solani.
Tikka disease in groundnut	Also called as leaf spot disease, is a fungal disease caused by Cercospora arachidicola.
Leaf curl in tomato	Viral disease transmitted by whitefly Bemisia tabaci.
Brown rot in peach	Fungal disease caused by Monilinia fructicola.