Prediction by trapping of cheimatobie outbreaks in the forest

Abstract

female capture to be a good population indicator. The main role of concurence acting between the pheromonal emissions of the two types of traps and those of females present on all the trees in the forest, was demonstrated during an outbreak phase. This can explain the observed shortage in the male progression, then its locking when females captures increase, as well the trapping sex-ratio variation during the time. The use of these indicators is discussed for a survey anr forecasting strategy.