POPULATION DYNAMICS AND NATURAL PARASITISM OF Leucoptera coffeella: INFLUENCE OF VERTICAL STRATIFICATION AND BORDER EFFECT
DOI:
https://doi.org/10.66104/42e4w707Keywords:
Closterocerus sp., Coffee, Biological control, Integrated pest managementAbstract
The coffee leaf miner, Leucoptera coffeella (Guérin-Méneville and Perrotet, 1842), is a major pest in coffee production, causing severe defoliation and yield losses. This study aimed to evaluate the population dynamics and natural parasitism incidence of L. coffeella across different canopy strata and border environments in Catuaí Amarelo IAC 62 coffee plants. The research was conducted in Santa Mariana, Paraná, Brazil, between July and August 2022. The experimental plot was stratified into three environments: the central area and borders adjacent to coffee and maize crops. Ten plants per environment were sampled, collecting nine mined leaves per plant distributed across the upper, middle, and lower thirds of the canopy. In the laboratory, the number of live, dead, and parasitized larvae by Closterocerus sp. was quantified. Results demonstrated that infestation occurred heterogeneously, with the highest populations of live larvae located at the borders, particularly in the division with maize (451 larvae in the upper third). Niche preference varied by environment: in the center, the peak occurred in the middle third, while at the coffee border, the highest density was observed in the lower third. Natural parasitism by Closterocerus sp. showed a functional response to pest density, with higher incidence in areas of greater infestation. It is concluded that the distribution of L. coffeella is influenced by microclimate and field location, requiring monitoring strategies focused on border zones to optimize integrated pest management.
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