The main goal of an advisory system for environmen- tally sound plant protection is to reduce the application rate and application frequency of pesticides by means of recommendations for the specific use of pesticides to assure constant or increased security of yield. In order to realize this goal, the use of pesticides is recommended only if its effectiveness is guarenteed and if an economic loss is to be expected without any means of plant protec- tion.
Pest control stops the development of and hinders mass spreading of specific generations of pests.
Deutsche Tagung Expertensysteme, Leistungsschau.13pp. One licence hasbeen installed at each official advisory office, and more than 200 otherlicenses at farm and private advisor offices. In other parts of Germanythe system runs at several places, mostly at official authorities and advisoryoffices, although the system was constructed mainly for farmers, who runthe system on their own pc. Somes licenses have been installed for testingin other european countries. The main reason for difficulties in runningthe system outside of Germany is the absence of meteorological data inthe right format, as well as the different situation of pesticides admittanceallowance.