Δημοσίευση ερευνητικής εργασίας στο Weed Technology που προέκυψε από την συνεργασία του Πανεπιστημίου Ιωαννίννων (Τμήμα Φυτικής Παραγωγής) με το Πανεπιστήμιο του Auburn, USA και το United States Department of Agriculture (Agriculture Research Services) με τίτλο: “Influence of a Cereal Rye Cover Crop on the Critical Period for Weed Control in Soybean.” Η περίληψη του άρθρου παρατίθεται παρακάτω:
Soybean is the world’s most widely grown leguminous crop and is an important source of oil and protein for food and feed in addition to other industrial uses. However, herbicide resistant and troublesome weed control challenges limit yield potential and threaten conservation tillage (CT) systems. Cover crops have been widely adopted as an integrated pest management component in CT systems to suppress weeds and maintain soybean yield potential. A three-year field experiment was conducted to estimate the influence of a cereal rye cover crop following conservation tillage on the critical period for weed control (CPWC) in soybean. The experiment was implemented in a split-plot design in which main plots as conservation tillage following cover crop (CT + CC), conservation tillage following winter fallow (CT + WF) and conventional tillage (CVT), and sub plots were multiple durations of weed free and weed interference. Results showed that the estimated CPWC of CT + CC and CT + WF treatments was 0 weeks and >7 weeks, respectively in 2018. In 2019, the estimated CPWC was 0 weeks, 5.0 weeks, and 1.3 weeks under CT + CC, CT + WF, and CVT treatments, respectively. In 2020, the estimated CPWC was 3.5 weeks, >6.2 weeks, and 0 weeks under CT + CC, CT + WF, and CVT treatments, respectively. The presence of cover crop delayed the CTWR and caused an early beginning of the CWFP compared with CT + WF treatment, hence shortened the CPWC in 2018 and 2019. In conclusion, the CT + WF system did not reduce the weed competition and subsequent yield loss in soybean as compared to CT + CC system.