Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

From Basic to Applied Knowledge: Larval Development and Sex Morphology to Control Leucoptera coffeella (Lepidoptera: Lyonetiidae)

Version 1 : Received: 2 December 2020 / Approved: 3 December 2020 / Online: 3 December 2020 (11:31:35 CET)

How to cite: Motta, I.; Dantas, J.; Vidal, L.; Bilio, J.; Pujol-Luz, J.R.; Albuquerque, É.V.S. From Basic to Applied Knowledge: Larval Development and Sex Morphology to Control Leucoptera coffeella (Lepidoptera: Lyonetiidae). Preprints 2020, 2020120083 (doi: 10.20944/preprints202012.0083.v1). Motta, I.; Dantas, J.; Vidal, L.; Bilio, J.; Pujol-Luz, J.R.; Albuquerque, É.V.S. From Basic to Applied Knowledge: Larval Development and Sex Morphology to Control Leucoptera coffeella (Lepidoptera: Lyonetiidae). Preprints 2020, 2020120083 (doi: 10.20944/preprints202012.0083.v1).

Abstract

The coffee leaf miner Leucoptera coffeella (Guérin-Mèneville & Perrottet), is a key pest in coffee producing countries. During their development, the larvae feed on the palisade parenchyma of the leaves forming mines. As a result, the photosynthetic area of the plant decreases, affecting coffee production. Despite the severity of the damage caused by coffee leaf miner (CLM), morphological aspects of the larval development and the adult genitalia remain unknown. It is important to identify more susceptible targets to an efficient and narrow control by natural or synthetic approaches, relies on determining the larval instars. Equally important is the sexing of the adult, in experiments aiming efficient ways to control CLM, as the study of pheromone-based control methods. This work presents the first morphological description of the four larval instars and the adult genitalia of L. coffeella. In each larval instar, we measured the Mean ± SD (mm) of the cephalic capsules (1st 0,14±0,03; 2nd 0,25±0,04; 3rd 0,32±0,03; 4th 0,42±0,03) and observed the following morphological details: primary setae, prolegs, crochets and ecdysial line of the cephalic capsule. In the adults, we observed the sexual structures present in both genitalia: male - bulbus ejaculatorius, valva, anellus, gnathos and aedeagus and female - ovipositor, sclerite and corpus bursae. The dissection of the adult specimens confirmed that the external morphology corresponds to the correct sex attribution in CLM adults. These results may support innovative and improved control strategies for CLM Integrated Pest Management (IPM).

Subject Areas

genitalia; damage; instar; insect pest; dimorphism

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