Abstract:
In our country, cereal bugs are spread in all counties where people grow wheat. The numeric level of the populations is
different, according to the agri-climatic conditions and the breeds that are cultivated. In the attack area, the predominant
species is Eurygaster integriceps, which represents over 85% of cereal bug species.[4,6]. In order to assess the
biological reserve of cereal bugs and evaluating the attack they produce on wheat, we made diagonal probing (40
probings of 0,250 m2
each), in autumn, in 14 forests in Timiş County, starting with September 10th – 15th 2007. For
this, we used a metric frame of 0.5/ 0.5 m. We analysed the layer of leaves inside the frame, then the rot to the ground,
recording the bugs we found alive and the ones we found dead.Examining the data obtained we could see that in autumn
2007 the average density in Timiş County was of 0.49 ≈ 0.5 specimens/m2 ; in spring the average reserve in Timiş
County was of 0.36 ≈ 0.4 live bugs/m2 ; maximum values od the number of live bugs/m2
were determnined in Banloc
forest in Banloc commune (0.9 bugs/m2
), in Pădureni forest, Jebel commune (0.8 specimens/m2
). Minimum values of
the number of live bugs/m2
were registered in Nemeşeşti forest, Margina commune (0.1 specimens/m2
), in Cenad
fiorest, Cenad commune (0.1 specimens/m2
), in Pesac forest, Periam commune (0.1 specimens/m2
); medium values of
the number of live bugs/m2
were determined in Sinersig forest, Boldur commune (0.4 specimens/m2
); in autumn 2009
the average density in Timiş County was of 1,2 specimens/m2
.
