This is a power search of the key data in the detailed datasheets. Datasheets on pests and diseases of a specific crop, their geographical distribution, the parts and stages of the plant they attack, and their symptoms can be retrieved through the use of simple keyword searches.
You can easily build your search by adding additional keywords e.g.
Ghana = will retrieve pests, diseases and hosts found in that country
Ghana maize = pests, diseases and hosts associated with maize
Ghana maize Lepidoptera = as above but connected with the Order Lepidoptera
For further examples see the Advanced Datasheet search examples on the 'Search Help' page