Diapause initiation and alterations in the life cycle of Grapholita molesta (Busck) (Lepidoptera: Tortricidae) as induced by photoperiodic conditions
Neotrop. entomol
; 40(5): 529-532, Sept.-Oct. 2011. tab
Article
in En
| LILACS
| ID: lil-604478
Responsible library:
BR1.1
ABSTRACT
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 (LD) (1014, 1113, 1212, 1311, 1410 and 168) at 25 ± 1ºC and 60 ± 10 percent 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.
Key words
Full text:
1
Index:
LILACS
Main subject:
Photoperiod
/
Lepidoptera
/
Life Cycle Stages
Limits:
Animals
Language:
En
Journal:
Neotrop. entomol
Journal subject:
BIOLOGIA
/
ZOOLOGIA
Year:
2011
Type:
Article