Parthenogenesis in the green oak tortrix, Tortrix viridana L Lepidoptera, Tortricidae Developpement parthenogenetique chez la tordeuse verte du chene, Tortrix viridana L Lepidoptera, Tortricidae

D.Merle, P.

Bulletin de la Societe Entomologique de France. Mars; 1041: 85-90

1999


Accession: 038528398

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Abstract
Eleven sets of eggs laid by virgin Tortrix viridana females of varied origins (6 geographical provenances, 4 species of oaks attacked) were held under conditions themselves varied, continuously natural for two of them. They comprised a total of 10 127 eggs. In each case, eggs (4.7-8.6% of the individuals; 6.4% on average) presented an embryonic development. In each case too, this development continued in some eggs (0.5-2.4% of the individuals; 1.5% on average) up to the formation of a larva. In total, 13 eggs hatched. The variety of the populations studied suggests that parthenogenesis is a potentiality that characterizes the species T. viridana as a whole. But mortality during embryonic development was high in parthenogenetic eggs, and it is unlikely that parthenogenesis could influence the population dynamics of the tortrix.