The lima bean plant, Phaseolus lunatus, is often attacked by the spider mite Tetranychus urticae. This herbivorous pest damages the plant by feeding on its leaves.
The predatory mite Phytoseiulus persimilis is a natural predator of T. urticae. It feeds on these pest spider mites, reducing their numbers.
When its leaves are damaged by T. urticae, the plant P. lunatus releases volatile organic compounds, including methyl salicylate. This compound attracts P. persimilis to the infested plants.
Which of the following explain(s) why P. lunatus releases methyl salicylate?
1, 2 and 3
Only 1 and 2
Only 2 and 3
Only 1