NEET2007ZoologyBiotechnology and Its ApplicationsActual
Which of the following is correct match?
Options
- A( array |c|c| Disease & Pathogen Wilt disease & Synchytrium array )
- B( array |c|c| Disease & Pathogen Citrus canker & Xanthomonas array )
- C( array |c|c| Disease & Pathogen Red rot of sugarane & Ustilago array )
- D( array |c|c| Disease & Pathogen Powdery mildew & Fusarium array )
Correct answer
B. ( array |c|c| Disease & Pathogen Citrus canker & Xanthomonas array )
Step-by-step solution
Citrus canker is a bacterial disease. It is caused by bacteria Xanthomonas citri which is aerobic, rod shaped and monotrichous. It is a world wide disease of most Citrus plants but the most susceptible are grape fruits, sweet orange, lime and lemon. The symtoms first appear on the undersurface of leaves as small watery slightly raised, round light green spots that finally rupture to form corky crater like lesions or canker. Twigs, fruits, also develop lesions. The disease reduces the quantity and quality of fruits.