Status of D. [Diabrotica] virgifera virgifera LeConte in Serbia [Yugoslavia] in 2002
Sivcev, I.(Institut za zastitu bilja i zivotnu sredinu, Beograd (Serbia and Montenegro)) | Galo, A.(Institut za zastitu bilja i zivotnu sredinu, Beograd (Serbia and Montenegro))
In 2002 we continued with monitoring of WCR (Diabrotica virgifera virgifera LeConte) dispersal in Serbia. Sex pheromone traps and Pherocon AM traps, were used on 100 sites in order: a) to check presence or absence of WCR imagoes and b) to check population density on permanent monitoring sites. Further spread on the south east was registered, in region of Pirot and on the south of Serbia in the region of Prokuplje. In that newly infested regions population density is low and the number of caught beetles/trap/week ranged from 1 up to 3. Infested area in 2002 is estimated on 71.900 square km. Within infested area with WCR in Serbia registered population density is quite different ranging from low to high. In most of the regions population density is increased but still bellow economic threshold on majority of the fields. In general, after population breakdown in 2000 population is recovering but not in all regions. In southern Vojvodina due to a severe drought seed germination and plant and corn root development was not synchronized with larval hatching. Therefore high mortality of larvae occurred which resulted in further population density decrease. Economic population and damages were registered in the area which is increasing and now is covering area of about 28.000 square km. In 2002 we registered new areas with damages from larvae in north-west of Serbia. Severely damaged corn fields were reported mainly from northern - newly infested areas of Serbia by economic population. Density population of WCR is much higher in corn fields on the north.
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Эту запись предоставил Unassigned data from Czechoslovakia