Presentacion Ingles

1. Pine processionary caterpillar Elia Hermoso de Mendoza Asier Labaca Ibai Sagarna Arrate Echeveste 3ºITA (HF)

5. Biological cycle of Scots pines Flowering and pollination April (year 0). year 1 Female strobili are fertilized year 2 May of year 1 to January seed dispersion 22 months Cones develop

6. Biological cycle of processionary Cycle univoltine Adult flight in mid-summer. 45 days September Eggs laid and hatch in the canopy of the trees autumn and winter larvae develop In the nest ---protected cold

7. 2.- METHODS Study realized In Trevenque area National Park of Sierra Nevada Why?? Grow native Pinus Silvestris nevadensis In 98´- 99´had a heavy defoliation by PPC (pine processionary caterpiller) Studying Biological cycle of Scots pine (1) PPC (2)

8. 2.1.- Damages Defoliation January and March Larvae are in a mature state. 2.2.- Sampling They observed the survival of the Scot pine How?? - Estimating of porcentage of defoliation suffered during the period of plague activity. - And divide the new growth by initial growth. 2.2.1.- On juvenile Scot pine

9. 2.2.3. On adult Scot pine Observed parts of the pine as: First: Two process: 1) Estimated the percentage of damage suffered during the period of plague. 2) Choose 10 pines completily defoliated and 10 with low or no defoliation. They measured Measured of diametre, lengh and the number of seeds and the average weight. cones, flowers seeds.