Rate of consumption,biological parameters,and population growth capacity of Orius laevigatus fed on Spodoptera exigua |
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Authors: | Miguel Aragón-Sánchez Luis R. Román-Fernández Héctor Martínez-García Agustín Aragón-García Ignacio Pérez-Moreno Vicente S. Marco-Mancebón |
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Affiliation: | 1.Centro de Agroecología, Instituto de Ciencias,Benemérita Universidad Autónoma de Puebla,Puebla,Mexico;2.Departamento de Agricultura y Alimentación,Universidad de La Rioja,Logro?o,Spain |
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Abstract: | Orius laevigatus (Fieber) (Hemiptera: Anthocoridae) is already successfully used to control Frankliniella occidentalis (Pergande) (Thysanoptera: Thripidae) in protected crops. In the present work, the predatory capacity of O. laevigatus on the eggs and larvae of Spodoptera exigua (Hübner) (Lepidoptera: Noctuidae) as well as the population growth capacity of O. laevigatus fed on eggs of the noctuid were determined. Fourth and 5th instar nymphs had a greater consumption of eggs than younger ones. Females consumed more eggs than males. Only 5th instar nymphs and adults preyed on the neonatal larvae of S. exigua. The intrinsic rate of natural increase did not differ between O. laevigatus fed with S. exigua eggs and those offered eggs of the substitute host Ephestia kuehniella (Zeller) (Lepidoptera: Pyralidae). Thus, O. laevigatus is a good candidate for the biological control of S. exigua, a cosmopolitan pest of many crops. |
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