Modeling codling moth (Lepidoptera: Tortricidae) phenology and predicting egg hatch in apple orchards of the Maule Region, Chile

Wilson Barros-Parada; Alan L. Knight; Eduardo Fuentes-Contreras

Keywords: Bio x, Cydia pomonella, degree days, codlemone, Malus domestica, pear ester.


Studies were conducted in the Maule Region to characterize the phenology of the codling moth, Cydia pomonella (L.) The Predictive Extension Timing Estimator (PETE) and a logistic phenological model were validated with eight data sets of cumulative moth catches in sex pheromone (PH) and kairomone-baited traps and the cumulative occurrence of fruit injuries from apple (Malus domestica Borkh.) orchards during the 2009-2011 seasons. Second, the start of egg hatch was predicted from the rst sustained male and female moth catches (bio x) in traps baited with pear ester (PE), PE+acetic acid (AA), PE+PH, and PH alone. Both phenological models t data well except that the logistic provided a better t than the PETE model of the phenology of egg hatch of the codling moth in the rst generation, with a difference of 11 d between models in the prediction of 50% egg hatch. No signi cant difference was found between bio x dates established for males using either PH or PE+PH lures or for the bio x date based on female catches with PE+AA or PH+PE. The bio x established with the sustained female catch occurred nearly 11 d later than the male-based bio x. The use of a female bio x provided on average a 4-d improvement in the prediction of rst egg hatch compared with the traditional use of a male bio x, but this difference was not signi cant. The use of PE+AA lures increased the proportion of cases when a female-based bio x could be established compared with the use of the PH+PE lure.

Más información

Volumen: 75
Editorial: Instituto de Investigaciones Agropecuarias, INIA
Fecha de publicación: 2015
Página de inicio: 57
Página final: 62
Idioma: English
Notas: ISE