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Neotrop Entomol

Title:		Reproductive behaviour of Crocidosema (=Epinotia) aporema (Walsingham) (Lepidoptera: Tortricidae): temporal pattern of female calling and mating
Author(s):		Altesor P; Horas VR; Arcia MP; Rossini C; Zarbin PH; Gonzalez A;
Address:		"Lab de Ecologia Quimica, Facultad de Quimica, Univ de la Republica, Montevideo, Uruguay. paltesor@fq.edu.uy"
Journal Title:		Neotrop Entomol
Year:		2010
Volume:		39
Issue:		3
Page Number:		324 - 329
DOI:		10.1590/s1519-566x2010000300003
ISSN/ISBN:		1519-566X (Print) 1519-566X (Linking)
Abstract:		"Crocidosema aporema (Walsingham) is a major pest of legumes in the southern cone of Latin America. The mating behaviour of two allopatric populations (Uruguay and Brazil) of C. aporema kept in captivity was studied by observing the posture of calling females, the temporal pattern of pheromone emission and mating, and the response of males to calling females in olfactometer tests. Female calling and mating was observed during the scotophase, from the first to the seventh night after adult emergence. Male response was evaluated at night using a single calling female in a Y-shaped olfactometer. Females adopted a characteristic calling posture, extruding the pheromone gland from the tip of the abdomen. Most females started calling during the second scotophase, and all females called from the third, between the fifth and seventh hours after the onset of the scotophase. Most of the couples mated once throughout the experiment, between the third and sixth night and during the middle of the dark phase. Males preferentially chose the female arm in olfactometer tests, considering both the first arm chosen and the number of visits during the observation period. Our results describe for the fi rst time the temporal pattern associated to the reproductive behaviour of C. aporema. We also provide evidence that this tortricid is monoandrous, and that pheromones are used in intersexual communication for mate finding. Our data will be used to optimize the collection of female sex pheromones for chemical characterization in order to develop a monitoring tool for this pest"
Keywords:		"Animals Female Lepidoptera/*physiology Male *Sexual Behavior, Animal Time Factors;"
Notes:		"MedlineAltesor, Paula Horas, Vanusa R Arcia, Maria P Rossini, Carmen Zarbin, Paulo H G Gonzalez, Andres eng Research Support, Non-U.S. Gov't Netherlands 2010/08/03 Neotrop Entomol. 2010 May-Jun; 39(3):324-9. doi: 10.1590/s1519-566x2010000300003"