Fatores determinantes do ataque de Neoleucinodes elegantalis ao tomateiro / Factors determinating the attack of Neoleucinodes elegantalis on tomato

AUTOR(ES)
DATA DE PUBLICAÇÃO

2010

RESUMO

The small tomato borer Neoleucinodes elegantalis (Lepidoptera: Crambidae) is considered a major pest due to serious damage in tomato. For the planning of strategies and tactics of management of N. elegantalis is essential to determine the factors that affect population dynamics and knowledge of stages and key factors of mortality. Therefore, objective of this study was to identify the critical stages and key factors of mortality of N. elegantalis and determine the effects of climatic factors and natural mortality in their population dynamics. Two experiments were conducted. In the first monitored the mortality of N. elegantalis the four seasons in two years and the second experiment the densities of these insect and climatic elements. We were make ecological life tables for each season, diagrams of the redundancy analysis, path analysis and graphs of densities and climatic elements. The critical stages of mortality were pupa (spring), eggs and pupa (summer and autumn) and egg, larva and pupa (winter). The key factors of mortality were predation of pupae by the bird Zonotrichia sp. (spring and autumn) and the ant Solenopsis sp. (summer and winter), predation of eggs (winter) and parasitism of Trichogramma pretiosum (summer, autumn and winter) and physiological disorders in larvae (winter). The highest densities of N. elegantalis occurred between the summer and autumn and are associated with high temperatures, rainfall and when the photoperiod is decreasing.

ASSUNTO(S)

tabelas de vida broca pequena do tomate solanum lycopersicon predadores parasitóides clima entomologia agricola life tables tomato small borer solanum lycopersicon predators parasitoids climate

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