THE SPRUCE PROTECTION AGAINST THE PEST IPS TYPOGRAPHUS L. (COLEOPTERA, SCOLYTIDAE) THROUGH STEM INJECTION WITH BIOLOGIC INSECTICIDE NEEMAZAL –T/S PUBLISHEDCiprian George Fora, Karl Fritz Lauer
The effectiveness of NeemAzal-T/S insecticide used against Ips typographus L. bark beetle was assessed by using the method based on solution injection with 4% concentra-tion in spruce tree trunks. The method is nonpolluting both concerning the insecticide as well as the way of solution administration (the solution does not get in contact with the environment).The effectiveness on pest larva control was of 90% at 2-2.5 m trunk height, 87% at 4.5 – 5 m, 79% at 7 -7.5 m, 82% at 9.5-10 m, 85% at 12 -12.5 m, 62% at 14.5- 15 m and 75% at 17- 17.5 m. Considering that none of the individuals managed to undergo pupa stage it has been assessed that the insecticide efficacy on pupae was of 100% for all samples. Nevertheless, such studies are still in their initial stage and are the first to be performed in the country the method is still requiring improvement. Our studies clearly demonstrate that spruce trees may be protected against Ips typographus L. beetle by means of such methods.
NeemAzal; stem injection; Ips typographus; spruce protection