A three-years study was carried out on egg development by several Sardinian populations of green oak leaf roller moth. In Spring 2005 coincidence between budburst and egg hatching was analyzed in two mixed oak stands of Quercus pubescens and the evergreen oaks Q. ilex and Q. suber. In each stand the time of budburst was the same for the different oak species and egg hatching did not differ in the Tortrix viridana populations associated with each oak. During 2005/06 and 2006/07, trends of diapause completion and egg hatching of thirteen T. viridana populations collected in some Sardinian forestry districts and associated with Q. pubescens, Q. suber, or Q. ilex were compared in two semi-field trials. In both years T. viridana populations showed differences in cold requirement for diapause completion and displayed non synchronous egg hatching.
Egg development and diapause in Sardinian populations of Tortrix viridana L.
Giuseppe Serra;
2012
Abstract
A three-years study was carried out on egg development by several Sardinian populations of green oak leaf roller moth. In Spring 2005 coincidence between budburst and egg hatching was analyzed in two mixed oak stands of Quercus pubescens and the evergreen oaks Q. ilex and Q. suber. In each stand the time of budburst was the same for the different oak species and egg hatching did not differ in the Tortrix viridana populations associated with each oak. During 2005/06 and 2006/07, trends of diapause completion and egg hatching of thirteen T. viridana populations collected in some Sardinian forestry districts and associated with Q. pubescens, Q. suber, or Q. ilex were compared in two semi-field trials. In both years T. viridana populations showed differences in cold requirement for diapause completion and displayed non synchronous egg hatching.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
