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 first sustained male and female moth catches (biofix) in traps baited with pear ester (PE), PE+acetic acid (AA),
PE+PH, and PH alone. Both phenological models fit data well except that the logistic provided a better fit than the PETE
model of the phenology of egg hatch of the codling moth in the first generation, with a difference of 11 d between models
in the prediction of 50% egg hatch. No significant difference was found between biofix dates established for males using
either PH or PE+PH lures or for the biofix date based on female catches with PE+AA or PH+PE. The biofix established
with the sustained female catch occurred nearly 11 d later than the male-based biofix. The use of a female biofix provided
on average a 4-d improvement in the prediction of first egg hatch compared with the traditional use of a male biofix, but this
difference was not significant. The use of PE+AA lures increased the proportion of cases when a female-based biofix could
be established compared with the use of the PH+PE lure.
