San Salvador de Jujuy, Argentina
San Salvador de Jujuy, Argentina

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Descamps L.R.,Laboratorio Of Zoologia Agricola | Sanchez Chopa C.,Laboratorio Of Zoologia Agricola | Ferrero A.A.,National University of the South
Natural Product Communications | Year: 2011

Essential oils extracted from leaves and fruits of Schinus areira (Anacardiaceae) were tested for their repellent, toxic and feeding deterrent properties against Tribolium castaneum (Coleoptera: Tenebrionidae) larvae and adults. A topical application assay was employed for the contact toxicity study and filter paper impregnation for the fumigant assay. A treated diet was also used to evaluate the repellent activity and a flour disk bioassay for the feeding deterrent action and nutritional index alteration. The essential oil of the leaves contained mainly monoterpenoids, with α-phellandrene, 3-carene and camphene predominant, whereas that from the fruits contained mainly α-phellandrene, 3-carene and β-myrcene. The leaf essential oil showed repellent effects, whereas that from the fruit was an attractant. Both oils produced mortality against larvae in topical and fumigant bioassays, but fumigant toxicity was not found against adults. Moreover, both essential oils produced some alterations in nutritional index. These results show that the essential oils from S. areira could be applicable to the management of populations of Tribolium castaneum.

Riquelme V. M.B.,National University of Luján | Riquelme V. M.B.,Laboratorio Of Zoologia Agricola | Ansa M.A.,National University of Luján | Ansa M.A.,Laboratorio Of Conservacion Del Sistema Agropecuario | And 2 more authors.
Revista Colombiana de Entomologia | Year: 2013

Amaranth is currently considered a "strategic grain crop" because of its broad genetic variability, hardiness, and nutritional value. In the Argentinean Pampas Region, one of its major pests is the cerambycid stemborer, Aerenea quadriplagiata. This study aimed to evaluate the oviposition preference of this pest related to both different cultivars and morphometric characteristics of the amaranth plant. In the experimental field of the Universidad Nacional de Luján, plots with different cultivars of Amaranthus were planted in two consecutive years. The presence and number of oviposition and oviposition effective ratio (with development of larvae) were related to the cultivar, the height and the stem diameter. The horticultural cultivar presented the lowest oviposition effective ratio, the lowest percentage of plants with oviposition and larger stem diameter with a 50% chance of being oviposited by A. quadriplagiata. These results suggest that the behavior of female stem borer is influenced by both the cultivar and stem diameter and that A. mantegazzianus L. cv horticola is the most recommended cultivar in areas where there is high incidence of the stem borer.

Aquino D.A.,National University of La Plata | Tavares M.T.,Federal University of Espirito Santo | Balducci E.,Instituto Nacional de Tecnologia Agropecuaria | Baca V.,Laboratorio Of Zoologia Agricola | De Quinteros S.Q.,Laboratorio Of Zoologia Agricola
Zootaxa | Year: 2015

A lectotype is designated for Brachymeria subrugosa Blanchard 1942 (Hymenoptera: Chalcididae). The species is diagnosed, redescribed, and compared to B. subconica Bouček, both of which are illustrated by macrophotography. Taxonomic notes, new parasitoid/host associations and new geographical records are also given for B. subrugosa. Brachymeria annulipes (Costa Lima 1919), a junior secondary homonymy of Chalcis annulipes Walker 1834, is proposed as a junior synonym of B. subrugosa syn. nov. Copyright © 2015 Magnolia Press.

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