CDFA Pest Prevention Plant Regulation Practice Exam

Which of the following plants is NOT restricted movement from areas infected with citrus white fly only?

1. Lemon tree

2. pumelo tree

3. Guava tree

4. osmanthus spp.

The correct answer is: Guava tree

The correct answer identifies the guava tree as the plant that is not restricted from moving from areas infected with citrus white fly. This is significant because certain pests, such as the citrus white fly, have specific host plants that are subject to movement restrictions to prevent the spread of the pest to uninfected areas. In this context, lemon trees and pumelo trees are directly affected by citrus white fly, as these are among the host plants that the pest targets. Therefore, movement restrictions would apply to these species to protect other areas from infestations. Osmanthus species can also be impacted by various pests, but they do not typically host citrus white fly, thus having restrictions applied may not be as rigorous or necessary as those applied to lemon or pumelo trees. Guava trees, on the other hand, are not a known host for the citrus white fly, and thus their movement is unrestricted even in areas where the pest is present. This is crucial information for pest management and understanding which plants can be safely moved without exacerbating the spread of the pest.