Abstract

MORENO FAJARDO, Olga Lucía  and  SERNA CARDONA, Francisco Javier. BIOLOGY OF  Peridroma saucia (LEPIDOPTERA: NOCTUIDAE: NOCTUINAE) ON FLOWERS OF THE COMMERCIAL HYBRID OF  Alstroemeria spp.. Rev. Fac. Nac. Agron. Medellín [online]. 2006, vol.59, n.2, pp.3435-3448. ISSN 0304-2847.

Peridroma saucia is an harmful pest of flowers cut for exportation from Colombia .  Its integrated management requires basic local information about its biology.  In the present work its life cycle on Alstroemeria spp was followed under two different temperature (°C) and relative humidity (RH) environments: the conditions 23,.72 °C and 82,93 % HR were maintained in a phitotron and those of 17,72 °C and 65,26 % RH were maintained in a greenhouse.  Likewise, we describe the different developmental stages of the pest as well as some behavioral aspects. The duration of the periods in days for the phitotron and greenhouse were respectively: eggs 5 and 8 days, larva 25,.1 +/- 1,34 and 41,26 +/- 1,88 days, pupa 15 +/- 1.66 and 29,7 +/- 2,.01 days, adults 18,6 days (range of 20) for females and 14,69 days (range of 14) for males (both in the greenhouse); the total cycle in the greenhouse required 97,56 days for females, and 93,65 days for males.  The species presented six larval instars under both of the environmental conditions.  A 0,6 growthcephalic factor was found for each one of the larval instars. This study also registered length and width dimensions of the larvae within each instars.

Keywords : Peridroma saucia; Noctuidae; life cycle; alstroemeria; pest biology.

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