ABSTRACT
Once you have confirmed the problem, if you are not familiar with it, some background will be required. By supplying information about the economic importance, life cycle and control of each disease, pest or disorder, we hope that an appreciation can be achieved. The selected references provided can act as a basis for further research, especially if there is little access to scientific literature databases. For some diseases and pests, scientific knowledge is published continuously, and it is impossible to include the most up-to-date references. For other problems, especially disorders, there has been little study or published work and, as a result, some of the references may be old.
