Question

Identify the bacterial disease among the following:

• A. Brown rust of wheat
• B. Tobacco mosaic disease
• C. Black rot of crucifers
• D. Late blight of potato

Hint:

Early identification of bacterial diseases is key to effective crop management.

Answer 1

The Correct Option is C

The bacterial disease among the options is Black rot of crucifers.

(A) Brown rust of wheat - Incorrect: Caused by fungus Puccinia triticina.

(B) Tobacco mosaic disease - Incorrect: Caused by TMV (Tobacco Mosaic Virus).

(C) Black rot of crucifers - Correct: Caused by Xanthomonas campestris pv. campestris bacteria.

(D) Late blight of potato - Incorrect: Caused by oomycete Phytophthora infestans.

The correct answer is (C) Black rot of crucifers, caused by a Gram-negative bacterium affecting cabbage-family plants.

Answer 2

Black rot of crucifers is a bacterial disease caused by Xanthomonas campestris, affecting crops like cabbage, cauliflower, and broccoli, which belong to the crucifer family.

• Brown rust of wheat is a fungal disease caused by Puccinia recondita.
• Tobacco mosaic disease is caused by a virus known as the tobacco mosaic virus (TMV), not a bacterium.
• Late blight of potato is caused by the fungus-like organism Phytophthora infestans.

Option (C) is correct as black rot of crucifers is the bacterial disease listed.