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Protecção integrada em tomate de indústria: estimativa do risco de lagarta do tomate Helicoverpa armigera
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Orientador(es)
Resumo(s)
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.
Descrição
Palavras-chave
helicoverpa armigera processing tomato risk assessment IPM natural parasitism egg spatial distribution tomate de indústria protecção integrada estimativa de risco parasitismo
Contexto Educativo
Citação
Encontro Nacional de Protecção Integrada, 6º, Castelo Branco, 2003