RESEARCH ON THE RELATIONSHIP BETWEEN SPECIES OF THE GENUS EURYGASTER AND THE ASSESSMENT OF THE DAMAGE CAUSED BY THEM IN SOME WHEAT CROPS IN IAȘI COUNTY

Rezumat

The research was carried out during 2020-2021 in selected forest sectors from 10 localities in Iași County. The method for assessing the density of Stink bug of the genus Eurygaster was carried out based on soil surveys, carried out on areas of 1 square meter, this parameter being essential in ecology and plant protection, to determine the degree of infestation or the distribution of a population in a habitat. Analysis of the recorded data revealed significant variations in the distribution and abundance of the Eurygaster integriceps, Eurygaster maura and Eurygaster austriaca species.In 2020, the density per square meter of the Eurygaster integriceps species varied significantly from 2,9 to approximately 23 specimens, while the Eurygaster austriaca species recorded density values between 2,9 and 8,18 with a somewhat more uniform distribution. Following surveys conducted in the spring of 2021, a general decrease in the density of Stink bug was observed in most localities. With the highest density of 16,05 specimens/m2, the Eurygaster integriceps species was also recorded, and Eurygaster maura recorded the maximum density of 6,65 specimens, while Eurygaster austriaca recorded the value of 1,78 specimens/m2 as the maximum value. By correctly measuring these parameters, specialists can make informed decisions regarding the control of this species and how to optimize their production.