Comportamento de chamamento de Thyrinteina arnobia (Stoll) (Lepidoptera: Geometridae) em Psidium guajava, Eucalyptus grandis e em dieta artificial

Abstract

-This work was carried out to determine and compare the effects of three diets (Psidium guajava and Eucalyptus grandis host-plant leaves and artificial diet) on the calling behavior and on the temporal pattern of calling behavior of Thyrinteina arnobia (Stoll). All activities of virgin females during six scotophases were observed in the laboratory at 5min. intervals until the females stopped calling in the following photophase, at 22 ± 1 o C, 70 ± 5% RH and 10h scotophase. The diets affected the calling behavior of T. arnobia. Two positions of calling were observed. Calling of female virgins started in the first hour immediately after emergence. The calling pattern was characteristic of the continuous pattern. The type of diet affected the mean onset of calling time (pre-calling) and the total time calling of T. arnobia. Older females called earlier than younger after the onset of scotophase. The diets affected the color of pheromone gland.KEY WORDS: Insecta, Eucalyptus brown looper, guava, defoliator RESUMO -Este estudo teve como objetivos determinar e comparar o efeito de três dietas: Psidium guajava, Eucalyptus grandis e dieta artificial no comportamento de chamamento e no padrão temporal do comportamento de chamamento de fêmeas virgens de Thyrinteina arnobia (Stoll). Foram analisados os parâmetros: tempo médio para o início do chamamento, número médio de chamamento, tempo médio de cada chamamento e tempo médio total de chamamento. Os bioensaios relacionados ao comportamento de chamamento de fêmeas virgens foram realizados durante seis escotofases consecutivas e as observações tomadas a cada 5 min., a 22 ± 1 o C, 70 ± 5% de UR e 10h de escotofase. As fêmeas, independente da dieta analisada, apresentaram duas posições diferentes de chamamento. A maioria das fêmeas virgens iniciou o chamamento na 1 a hora da 1 a escotofase. O padrão de chamamento da fêmea individualizada foi característico de um padrão contínuo. O tipo de dieta oferecida na fase larval influenciou o início do comportamento de chamamento (pré-chamamento) e o tempo médio total de chamamento. O tipo de dieta também alterou a coloração da glândula de feromônio.

Calling behaviour and male response towards sex pheromone of poplar moth Condylorrhiza vestigialis (Lepidoptera: Crambidae)

“…Similar behaviour was recorded for potato stem borer, H. micacea (West et al 1984). In contrast to our results, changes in the onset of calling behaviour with age have been recorded for other lepidopteran species (Turgeon and McNeil 1982;Batista-Pereira et al 2004;Zarbin et al 2007a, b). Swier et al (1977) suggested that by calling earlier A. ipsilon females increased their probability of mating by being the Wrst to attract the males.…”

Electrophysiological responses of eucalyptus brown looper Thyrinteina arnobia to essential oils of seven Eucalyptus species

“…Biological data on T. arnobia, reared on leaves of Eucalyptus spp, have been recorded by a number of groups. [2][3][4][5][6] Several strategies have been tried and considerable effort spent on the development of methods to control this pest, yet no practical and environmentally acceptable one currently exists. Control is made very difficult by the huge area of plantations and by the height of the trees.…”

Toward the Identification of the Sex Pheromone of Diatraea indigenella Dyar & Heinrich (Lepidoptera: Crambidae): Calling Behavior and Chemical Structure of a Major Component

“…The calling behavior during the first scotophase may be related to the reproductive maturity at emergence, since the association of pheromone production and sexual maturity has been described for various lepidopteran species (Webster & Cardé 1982;Babilis & Mazomenos 1992, Delisle & Royer 2004, Del Mazo-Cancino et al 2004, Gómez & Rojas 2006, Da Silva et al 2006. This behavior may also be associated with an increase in the probability of mating by being the first in attracting males (Turgeon & McNeil 1982, Gadenne 1993, Batista-Pereira et al 2004, Zarbin et al 2007.…”