Which of the following trees is NOT a host for Oystershell Scale?

Oystershell Scale is a pest known to affect a variety of trees and shrubs, particularly those in orchards and landscapes. Among the choices provided, Pine trees are not typically hosts for Oystershell Scale. This is primarily because Oystershell Scale has a preference for broadleaf deciduous trees and certain fruit trees, which provide the necessary environment and nutrients for the scale to thrive.

In contrast, Willow, Apple, and Birch trees are all susceptible to Oystershell Scale infestations. The species commonly infest these trees, leading to potential damage by feeding on the sap, which can weaken the trees and make them more vulnerable to other pests and diseases. Understanding the specific interactions between pests and host trees is crucial in managing and preventing infestations effectively, particularly in turf and ornamental practices.