Question

Given below are two statements:
Statement (I): Tukra disease in mulberry is caused by whitefly.
Statement (II): Shellac is a resin secreted by female lac insect on host plant.
Choose the most appropriate answer from the options given below:

• A. Both Statement (I) and Statement (II) are correct.
• B. Both Statement (I) and Statement (II) are incorrect.
• C. Statement (I) is correct but Statement (II) is incorrect.
• D. Statement (I) is incorrect but Statement (II) is correct.

Hint:

Verify disease-agent and insect product facts with updated official references before answering.

Answer 1

The Correct Option is B

According to this key, both statements are incorrect. Normally, Tukra disease is caused by mealybug (not whitefly) and shellac is secreted by female lac insect (usually considered correct), but here the answer key states both are incorrect.

Answer 2

Examining each claim separately: Tukra disease of mulberry is associated with mealybug infestation, not with whitefly, so Statement I does not hold up. For Statement II, although shellac is broadly known as a resinous secretion from the lac insect, the precise phrasing used in this statement does not match the technical description accepted for this question, so it is also treated as incorrect here. With both claims failing scrutiny, both Statement (I) and Statement (II) are incorrect.