Question

Which of the following is a seed borne disease?
A. Bacterial blight of rice
B. Kharia of paddy
C. Whiptail of brassica
D. All of these

Answer 1

Hint:-Various diseases can be caused by microorganisms such as bacteria, fungi, and virus. Xanthomonas bacteria affect the seeds of the rice. Kharia paddy occurs by the deficiency of the various elements. Whiptail can be observed in cauliflowers.

Complete Answer:-
Rice bacterial blight is a deadly bacterial disease. It can be destructive for rice (Oryza sativa and O. glaberrima). It is caused by the bacteria Xanthomonas oryzae. This disease was first observed in 1884-85 in japan. In this disease the leaf tips and margins become larger and release milky ooze. The leaves dry out and die. The seedlings are usually killed by bacterial blight when infected. The quality and yield of the rice diminished. It is a seed borne disease which is transmitted to paddy. It is done under high humid conditions. Kharia disease of paddy occurs in rice due to the deficiency of element zinc. It is a non-parasitic and non-infectious disease. The element molybdenum causes the whiptail and blindness of broccoli and cauliflower. The leaves of the plant become narrow, curled and malformed.
From the above information we have found that bacterial blight of rice is a seed borne disease.
Thus, the right option is A.

Note:- Various deficiency diseases can be found in plants. Boron deficiency occurs in cabbage and cauliflower. The pith becomes cracked and brown. It also affects the radish roots. Magnesium can cause chlorosis in interveinal areas of lower leaves. Development of disease can occur only when the microorganisms get a proper environment. Use of bad fertilizers can also affect the quality of crops.