Question

Little leaf disease of Brinjal is caused by a/an
A. Alga
B. Fungus
C. Mycoplasma
D. Bacterium

Answer 1

Hint: Little leaf disease of Brinjal is caused by a pathogenic mollicute, Phytoplasma. It was earlier called a Mycoplasma-like organism (MLO). This disease is transmitted by Hishimonus phycitis vector.

Complete answer:
Little leaf disease of Brinjal (eggplant) is botanical name is solanum melongena during this infection infection, no fruiting takes place and in late infection, fruits are formed but they are deformed and the seeds are shrivelled. The vector causing the disease through the leafhopper Hishimonus phycitis.
The disease is very serious and causes qualitative as well as quantitative losses.
Symptoms during disease Infected plants produce tiny, pale-green leaves on very short petioles. Stem internodes are short, stunted and bushy due to stimulation of axillary buds. Excessive root branching is common. Flowers formed after infection are leaf-like and sterile. Grafting also can spread the disease.so option (C)are correct.

Option (A)is not correct. This disease is not caused by algae because algae contaminated seafood and altered the environment.

Option (B)is not correct. This disease is not caused by fungus because fungus causes fungal diseases like ringworm, blastomycosis etc.

Option (D) is not correct. This disease is not caused by bacteria because it causes bacterial disease like pneumonia, tuberculosis etc.

Hence, the correct answer is option (C).

Additional information:
The main symptom of little leaf disease is the production of very short leaves by affected plants. The petioles of the leaf are so much reduced in size that leaves appear sticking to the stem.

Note: Since no effective control measure is found it is better to eradicate the weed host and remove the diseased Brinjal plants.