What unusual behavior occurs mid-larval stage of azalea leafminer?

What unusual behavior occurs mid-larval stage of azalea leafminer?

• A. Larva exits the mine and rolls a leaf for protection.
• B. Larva digs deeper into the leaf to feed.
• C. Larva pupates inside the mine.
• D. Larva moves to the stem for feeding.

Answer: (A)

The unusual behavior is that mid-larval stage, the azalea leafminer larva leaves the mine and uses silk to roll a leaf, creating a protective shelter. This lets the larva continue feeding while staying concealed, improving protection from predators and parasitoids and helping maintain a favorable microclimate. Leaf-mining insects usually stay inside their mines, so exiting the mine to form a leaf roll is a distinctive adaptation that enhances survival during that stage.

The unusual behavior is that mid-larval stage, the azalea leafminer larva leaves the mine and uses silk to roll a leaf, creating a protective shelter. This lets the larva continue feeding while staying concealed, improving protection from predators and parasitoids and helping maintain a favorable microclimate. Leaf-mining insects usually stay inside their mines, so exiting the mine to form a leaf roll is a distinctive adaptation that enhances survival during that stage.