Monitoring Melolontha melolontha L. Species in 2007, in the Nursery from U.P. IV Bătrâna O.S. Topliţa, Harghita Forest District
Abstract
Melolontha melolontha L. (called may bug), is the major species, the spread of this species, from Dobrogea and Câmpia Română up in the mountains area, was detected in both woodlands: hardwood and softwood. Following surveys in the nursery of U.P.IV Bǎtrâna, in 2007, has made the prognosis for Melolontha melolontha ( may bug) for 2008. May bug larvae were reported only on 20.83% of total area. Attack will be weak in 2008. In U.P. I Cǎlimǎnel nursery, degree of infestation is average (medium), corresponding to a density of 0.27 active larvae, in to the third age, per square meter. Infested area remains the same every year, being 1880 ha, and the infestation level is low. Limiting excessive multiplication of may bug beetles can be achieved only by applying an integrated system of measures, preventive and repressive, carefully and continuous supervision of population dynamics of pests and their density, by making the prognosis works. Using integrated method, the focus is on destroying the insects in adult stage, during flight period, preventing infestation of crop land by depositing eggs, using in this purpose repressive measures (collection of beetles, treated food), and preventive measures (plowing land, soil cover, using repellent substances, using smoke, using light traps). Destroying beetles in the larval stage is done primarily by physical and mechanical methods ( inundation, catch with bait plants) and agrotechnical methods (fall plowing, plowing soil with scrapers).
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