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Plant-Insect Ecosystems

10-Minute Paper

P-IE: Biocontrol On-Demand Presentations

Inundative releases of Chrysoperla externa (Neuroptera: Chrysopidae) eggs for the control of the coffee leaf miner Leucoptera coffeella (Lepidoptera: Lyonetiidae)

On-Demand
On-Demand

We studied the control of the coffee leaf miner Leucoptera coffeella (Lepidoptera: Lyonetiidae) using releases of the green lacewing Chrysoperla externa (Neuroptera: Chrysopidae) for the development of ecologically-based management programs for this pest in coffee fields. The treatments were: 1) green lacewing eggs released in paper cards (‘green lacewing release’); 2) application of orange oil and neem oil (‘organic management’). The ‘green lacewing release’ treatment received 45 cartons/ha, each containing approximately 30 predator eggs, one day before hatch; totaling 3,500 eggs/ha. One packet was released every 30 plants, on week 1, followed by identical releases on weeks 2, 3, and 4. In the 'organic management' treatment, the botanical insecticides (orange oil and neem oil) were sprayed when the population of coffee leaf miner reached high infestations, that is, above the action threshold (AT = 3% of live larvae). The releases of the predator C. externa reduced pest populations by up to 56.3% in the field. The results obtained in this research open the possibility of using the predator C. externa for the control of the coffee leaf miner in coffee fields.