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Which of the following determines the selection of host plant in insects by test biting and ovipositional probing?
EXPLANATION
Mechanisms of Host Plant Resistance to Insect
- Phases of Host Plant Selection by Phytophagous Insects:
- Host-habitat finding: Moving to the general plant community guided by light, wind, and broad environmental cues.
- Host finding: Orientation toward individual host plants using visual and volatile olfactory cues.
- Host recognition: Tactile and gustatory assessment of the leaf surface upon landing.
- Host acceptance: Verified by test biting, sap sampling, and ovipositional probing with chemoreceptors on antennae, tarsi, or ovipositor to confirm chemical compatibility.
- Host suitability: Nutritional adequacy supporting insect growth and reproduction.
- Conclusion: Test biting and ovipositional probing determine Host acceptance (Option 3).
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