Experience of potato late blight Phytopthora infestance (Mont.) de Bary forecasting using PC-P model NegFry under Latvian conditions
2001
Turka, I. | Bimsteine, G. (Latvia Univ. of Agriculture, Jelgava (Latvia). Faculty of Agriculture. Dept. of Plant Protection) | Gaile, Z.
The study deals with the control of the potato late blight under the conditions of Latvia. Field trials were carried out in the period of 1998-2000. In trials local potato varieties and local weather data were used. Routine fungicide application for the control of the late blight was compared with NegFry decision support model. The year 1998 was a very severe blight year, in contrast to that 1999 as well as the first half of the vegetation period of 2000 were not favourable for the development of blight. The reduction of treatment index was 12.5%, 60% and 20% respectively. There was no significant difference in yield and tuber blight between routine fungicide application and recommendations by NegFry model. Under Latvian agroecological conditions probably some criteria of NegFry model are in need of optimisation.
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