Abstract
Since 1988 a pest‐warning system has covered the southern and central parts of Sweden. These parts are divided into five plant protection regions with a centre in each. Approximately 1000 fields in eleven crops are assessed each Monday from May to July. The same day the results are computerized and distributed by fax to the advisers. The following morning the advisers in the region discuss the results and what measures to take, by telephone conference. Immediately after the conference, plant protection letters are written with the guidance of there commendations agreed by the conference. This system is fast, has a very good coverage and is much appreciated amongst extension staff.
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