Eureka! Institutional Repository

The survey of weeds provides in real-time data on the composition and population of weeds in crops, and over time with that data it can provide a reasonable prediction of the composition and population of weeds that grows in fields. For that reason, a survey has been carried out in autumn - winter 2021-2022 and spring - summer 2022, in which winter and spring weeds were recorded in 53 fields in 4 prefectures (Thessaloniki, Serres, Drama, Kavala) of Central and Eastern Macedonia. In this survey a total of 125 weed species were recorded, of which 105 species are broadleaves and the remaining 20 are narrow leaves. In particular, the survey carried out in autumn-winter recorded 75 winter weed species, of which 65 are broadleaves and the remaining 10 are narrow leaves. Also, the survey carried out in apring-aummer at the same fields recorded 50 species of spring weeds, of which 40 species are broadleaves and the remaining 10 are narrow leaves. The results of this survey showed that the number of winter weed species was significantly higher than that of spring weeds. Also, the number of broadleaf winter and spring weeds was much higher than that of narrow leave weeds. Winter weed species such as wild oats, poppy, bromegrass, ryegrass, false barley, and capsella had the highest rate in all 53 fields where surveys were conducted in these 4 prefectures. Of the spring weed species recorded, those with the highest rate in all 4 prefectures were Bermuda grass, European dodder, sedges, Johnson grass, goosefoot, and common purslane. The use of methods such as survey and seed bank studies could lead to an effective weed management.