Diversidad alfa y beta de thrips (Thysanoptera) y agentes de control biológico en flores de crisantemo (Chrysanthemum sp.) de dos ecoregiones en la provincia de Jujuy, Argentina

Gabriela B. ALEJO,María I. ZAMAR

doi:10.25085/rsea.800401

Abstract

The objectives of this study are to identify thrips and their biological controllers, to analyze their abundance in three flower opening stages stages of chrysanthemum crops, and to determine alpha and beta diversity in two ecoregions of Jujuy province (Argentina). The study was carried out in the Chaco ecoregion (ECH) in October and November 2016, and in the Prepuna ecoregion (EP) in February and March 2018. On each date, six replicates of five flowers were excised in the stages: flower bud , semi-open flower and open flower. Diversity profiles and rank-abundance curves were built, and Jaccard's coefficient of similarity was applied. The diversity profiles showed significant differences in thrips communities. In the ECH, 15 thrips species were identified; the dominant and permanent species were Microcephalothrips abdominalis (Crawford) and Frankliniella occidentalis (Pergande). Five species were recorded in the EP, although Frankliniella gemina Bagnall and Thrips tabaci Lindeman on their own represented 78% of the total abundance. In the ECH, 20 entomophagous species/morphospecies were recognized, and 19 in the EP; antocorids were dominant in both ecoregions. The thrips and the entomophagous communities of chrysanthemum flowers were different (34%) between the ecoregions studied.

Highlights

IntroductionMost studies addressing floricultural production in Regarding thrips biological controllers in Argentina, especially those carried out at the regional chrysanthemum flowers, t he e xisting l iterature only level, point out that it is an important activity with high reports species lists
Alejo & Zamar (2018) and Alejo et al (2019) analyzed the arthropods present on chrysanthemus.Most studies addressing floricultural production in Regarding thrips biological controllers in Argentina, especially those carried out at the regional chrysanthemum flowers, t he e xisting l iterature only level, point out that it is an important activity with high reports species lists
During the flowering stage of chrysanthemum crops in the Chaco and Prepuna ecoregions of Jujuy, differences in both species composition and abundance were detected, which were clearly reflected on the diversity profiles (Fig. 3A, B)

Summary

Introduction

Most studies addressing floricultural production in Regarding thrips biological controllers in Argentina, especially those carried out at the regional chrysanthemum flowers, t he e xisting l iterature only level, point out that it is an important activity with high reports species lists Such potential is 1999; Mendes Carvalho et al, 2006) and ecological associated with employment creation and diversification interactions with pest thrips, mainly F. occidentalis (Van possibilities for producers in rural and periurban areas Lenteren et al, 1995; Lacasa et al, 1996; Farkas surrounding the main consumption centers of the et al, 2016; Miranda-Salcedo & Loera-Alvarado, country (Villanova et al, 2013). In Argentina, the only studies that analyze thrips production areas are located in the metropolitan area of Buenos Aires and San Pedro (which concentrate 50% of the production), followed by Misiones, Santa Fe, Jujuy, Corrientes, Entre Ríos and Mendoza provinces (Herrero diversity and abundance within the framework of arthropod fauna in chrysanthemum flowers, both in the field and in greenhouses, are those by Alejo & Zamar (2018) and Alejo et al (2019), respectively. et al, 2017).

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