H. FESTIC1, H. BERBEROVIE2,
Z. HUREMOVIE2, N. KARIC1
1 University of Sarajevo, Faculty
of Agriculture
2 Institute of Agriculture,
Tuzla
In 2000, monitoring of occurrence and spread of Diabrotica v. virgifera has been continued. Investigations have been conducted in the two Entities f the country separately. This abstract includes only the results from the Federation where the above mentioned authors have monitored occurrence and spread of the pest.
This year, there were total of 71 monitoring
spots. Distribution of monitoring spots was such that they were positioned
at endangered places where further spreading of the pest was expected.
On each monitoring spot there was one pheromone trap and one Multigard
trap at the distance of 100 meters from each other. Traps were replaced
after 25 days. In 2000, the traps were placed in four Cantons:
Posavina Canton:
8 monitoring spots
Tuzla Canton:
43 monitoring spots
Zenica-Doboj Canton:
10 monitoring spots
Una-Sana Canton:
10 monitoring spots
In Tuzla Canton and Zenica-Doboj Canton, traps were positioned from June 23 to June 30, while in Posavina Canton and Una-Sana Canton they were placed at the beginning of July. In all cantons, imago was caught on the same or next day after their placement and the every seven days.
In Posavina Canton, Diabrotica was registered on all monitoring spots (8). In Tuzla Canton, out of 43 monitoring spots, it was registered on 41 spot, while in Una-Sana Canton it was not registered. In Zenica-Doboj Canton, the pest was registered on all ten monitoring spots.
This year, there has been a minor spread of Diabrotica to new areas. Increase has been registered in Posavina Canton, Tuzla Canton and Zenica-Doboj Canton. In Tuzla Canton, the increase is tremendous compared to 1999 on three locations (Tuzla, Lukavac, Teocak). The highest number of imagoes have been on pheromone traps, while it were minor on yellow multigard traps. The highest number were in July, mainly in the period before July 20. After August 15, the number were reduced to single cases. The last trapping was registered on September 15. We can therefore conclude that the imagoes reduced and ended in August, which is earlier than in the previous years.
This year, the total number of 4374 imagoes have been caught in the Federation of Bosnia-Herzegovina. The distribution per cantons is as follows: Posavina 1639, Tuzla 2661, Zenica-Doboj 74, Una-Sana 0. We estimate that Diabrotica v. virgifera occupied the 150 square kilometres more than in 1999. Damage from larvae has not been registered, while the damage from imagoes is insignificant.