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National Repository of Grey Literature 2 records found  Search took 0.00 seconds. 
Expert system for decision making about using of fungicides and zoocides in permanent cultures and vegetables and using of herbicides in field crops: certified methodology
 Kocourek, František ; Šrámková, Anna ; Stará, Jitka ; Jursík, Miroslav ; Hamouz, Pavel ; Abrhám, Zdeněk
Basic principles of expert system for decision making about using of fungicides and zoocides in permanent cultures and vegetables and using of herbicides in field crops including vegetable are described in methodology. Procedure for decision making about using of pesticides is based on using of multidimensional economic thresholds, mainly for pest and weeds, and on analysis of economic parameters and evaluation of negative impact of pesticides on the environment. Methods of development of damage curves and the model for determination of multidimensional economic threshold for pests and weeds are described. Methods for determination of environmental impact for active substances of herbicides, zoocides and fungicides are described. Principles of model of degradation of residues of pesticides in fruit and vegetable are described and verified on case studies of herbicides in vegetable and zoocides and fungicides in fruit and vegetable.
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Utilization of economical threshold in management of pest control in field crops
 Kocourek, František
In the methodology, basic principles of expert system for decision about using of pesticides according to economic threshold are described. Decision about using of pesticides is based on analysis of economical parameters and evaluation of pesticide impact on the environment. Methods of construction of damage curves for pests and diseases of field crops are described. Damage curves are quantified for economically important diseases and pests of field crops and injury levels are specified for 77 diseases and pests. Model for development of multidimensional economic threshold is described. It is an original mathematical model that includes (beside formerly used parameters as cost of pest control, yield, and price of product) two new parameters, efficacy of pest control and environmental impact of active substance of pesticide. Method of determination of environmental impact of active substances of pesticides is described and its values are given for pesticides registered in the Czech Republic against pests and diseases in field crops. In the end of methodology, principles of pest management on the basis of economic thresholds are summarized.
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