The document summarizes research on the translocation of insecticides in trees after trunk injection. Two tests were conducted using different injection methods and equipment on various tree species. The first test found that one method had abnormal results while another had slow movement. A third method showed rapid initial translocation that stopped after 5 hours. The second test found that translocation started quickly but stopped 2 days after for all methods. In conclusion, translocation seemed to stop 2 days after injection for reasons that require further investigation such as degradation or absorption of the organic coloring used.

1. 2 éme CONFERENCE SUR L’ENTRETIEN DES ESPACES VERTS, JARDINS, GAZONS, FORETS, ZONES AQUATIQUES ET AUTRES ZONES NON AGRICOLES Angers 28-29 Octobre 2009 TRANSLOCATION OF INSECTICIDES IN TREES L. Cevenini, A. Minelli Department of Fruit Sciences – Landscape unit Alma Mater Studiorum – University of Bologna

6. RESULTS 1° test Cut 1 (cm) Cut 2 (cm) Cut 3 (cm) Arboprof ® Organic colouring 29.3 44.3 11.7 Organic colouring + Azadirachtin 13.3 10 15 Arbocap ® Organic colouring 12.7 8.3 18.3 Organic colouring + Azadirachtin 13.3 13.3 21.6 Arborjet ® Organic colouring 25 26.7 27 Organic colouring + Azadirachtin 25 40 40

7. RESULTS 2° test Cut 1 (cm) Cut 2 (cm) Cut 3 (cm) Arboprof ® Organic colouring 45 48 38.5 Organic colouring + Azadirachtin 45 37.5 41.6 Arbocap ® Organic colouring 17.3 18.3 20 Organic colouring + Azadirachtin 56.6 83.3 76.6 Arborjet ® Organic colouring 158.3 140 263 Organic colouring + Azadirachtin 97.5 133 130