Q.1
Given below are two statements
Statement (|); Of all the insect orders, the insects with sucking mouthparts are generally responsible for the production of phytotoxemia.Statement (II) : Of all the insect orders, the insects with biting mouthparts are generally responsible for the production of
phytotoxemia.
In light of the above statements, choose the most appropriate answer from the options given below.
- Statement (I): Insects with piercing-sucking mouthparts (principally belonging to order Hemiptera: leafhoppers, planthoppers, psyllids, aphids, and coreids) inject specialized phytotoxic saliva into plant tissues during feeding. This causes localized or systemic physiological disorders known as phytotoxemia (e.g., hopper burn caused by Amrasca biguttula biguttula, psyllid yellows). (Correct).
- Statement (II): Insects with biting and chewing mouthparts (e.g., caterpillars, beetles, orthopterans) cause mechanical tissue destruction, defoliation, and stem cutting, but do not inject phytotoxic salivary secretions that cause systemic phytotoxemia. (Incorrect).
- Conclusion: Statement (I) is correct but Statement (II) is incorrect.
- Correct Option: Option 3 (Statement (I) is correct but Statement (II) is incorrect).
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