Diapause initiation and alterations in the life cycle of Grapholita molesta (Busck) (Lepidoptera: Tortricidae) as induced by photoperiodic conditions

Grapholita molesta (Busck) is one of the major pests of Rosaceae, causing significant damage to buds and fruits. In Southern Brazil, its population density is reduced during Rosaceae dormancy months. The present study evaluated the influence of different photoperiods (L:D) (10:14, 11:13, 12:12, 13:1...

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Bibliographic Details
Published in:Neotropical entomology 2011-10, Vol.40 (5), p.529-532
Main Authors: Sausen, C.D, Sant'Ana, J, Redaelli, L.R, Pires, P.D.S
Format: Article
Language:English
Subjects:
Animals
buds
diapause
dormancy
eggs
ENTOMOLOGY
fruits
Grapholita molesta
insects
larvae
Lepidoptera - growth & development
Life Cycle Stages
neonates
pests
Photoperiod
population density
prepupae
pupae
Rosaceae
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Summary:Grapholita molesta (Busck) is one of the major pests of Rosaceae, causing significant damage to buds and fruits. In Southern Brazil, its population density is reduced during Rosaceae dormancy months. The present study evaluated the influence of different photoperiods (L:D) (10:14, 11:13, 12:12, 13:11, 14:10 and 16:8) at 25 ± 1ºC and 60 ± 10% RH on diapause induction of G. molesta eggs, larvae, prepupae, and pupae. The effects of the photoperiod on the life cycle of non-diapausing insects and on the second generation were also assessed. Prepupal diapause was observed only when eggs and neonates (< 12h-old larvae) were exposed to photophases from 10h to 14h long. Development of non-diapausing individuals and those from the second generation tended to be longer in photophases between 10h and 14h long.
ISSN:1519-566X
1678-8052
1678-8052
DOI:10.1590/S1519-566X2011000500002