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Please use this identifier to cite or link to this item: http://hdl.handle.net/10400.5/727

Title: Protecção integrada em tomate de indústria: estimativa do risco de lagarta do tomate Helicoverpa armigera
Authors: Mexia, António
Figueiredo, E.
Amaro, F.
Godinho, M.
Stilwell, S.
Albano, S.
Salvado, E.
Keywords: helicoverpa armigera
processing tomato
risk assessment
IPM
natural parasitism
egg spatial distribution
tomate de indústria
protecção integrada
estimativa de risco
parasitismo
Issue Date: May-2003
Citation: Encontro Nacional de Protecção Integrada, 6º, Castelo Branco, 2003
Abstract: In Portugal, the processing tomato is of great economical importance. The objective of the work carried out in the Ribatejo is to develop an IPM program, particularly to establish risk assessment methodologies and decision rules for the main enemies of the tomato crop. Of these main enemies the fruitworm (Helicoverpa armigera (Hbn)) is the key-pest. The method that is in validation is based on the techniques used in California and México. These methods allowed to reduce sprays and change to alternative control methods, in particular biological ones - Bt and Trichogramma pretiosum releases. This study presents the research fields, main targets and results during 2000 crop season. Risk assessment methodologies are described and presented the adopted decision rules. A study related with egg and parasitized egg’s spatial distribution on the plant and on the field. Eggs were preferentially on superior level, inferior foliar page, terminal leaflet and field quadrants near the passes. Parasitized eggs do not follow this pattern. It is also presented natural parasitism level and discussed the value of adults monitoring curve as a quantitative risk assessment method.
URI: http://hdl.handle.net/10400.5/727
Appears in Collections:SPI - Comunicações em Actas de Conferências

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