USDA’s Proposed Regulations for the Movement of Citrus Fruit from Quarantined Areas
- Information in a question and answer format on proposals for controlling citrus canker in the U.S.
- http://www.aphis.usda.gov/publications/plant_health/content/printable_version/faq_movement_of_citrus_fruit.pdf

Citrus Research International
- Information on the research being undertaken into insect pests of citrus crops that cause economic damage and lower fruit quality.
- http://www.citrusres.com/ipm/

Graft-Transmissible Diseases of Citrus
- Information on techniques and laboratory methods for the biological detection of a number of pathogens that affect citrus trees and which can be transmitted through propagating material.
- http://www.fao.org/docrep/T0601E/T0601E00.htm

Diaprepes Root Weevil: A Pest of Citrus
- Photographs and details of the life cycle of this insect, the economic loss it causes, the damage to citrus trees, how to monitor it and preparing a management program.
- http://edis.ifas.ufl.edu/IN147

Bacterial Leaf Scorch
- Photograph of foliage of an orange tree affected by this disease.
- http://www.forestryimages.org/browse/detail.cfm?imgnum=1262027

Citrus Canker
- Notes on the symptoms of this bacterial disease, the conditions that favor its development and preventative control measures.
- http://www.oisat.org/pests/diseases/bacterial/citrus_canker.html