The effect of the strip-management on reduction of Aphis fabae (Homoptera: Aphididae) populations by predators on sugar beet crop
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Agricultural University, Department of Plant Protection Cybulskiego 32, 50-205 Wrocław, Poland
Jacek P. Twardowski
Agricultural University, Department of Plant Protection Cybulskiego 32, 50-205 Wrocław, Poland
Journal of Plant Protection Research 2005;45(3):213–219
The studies were carried out at the Agricultural Experimental Station at Pawłowice near Wrocław, Poland, in 1998-2000. The main aim of the study was to compare the natural reduction of the black bean aphid by predators in sugar-beet crop surrounded by strips of mixture of cultivated plants, weedy strips or bare soil. The lowest number of Aphis fabae i nsugar-beet crop was observed at the plots surrounded by strips of mixture of Sinapis alba, Phacelia tanacetifolia and Coriandrum sativum , and at those surrounded by weedy strips. The greatest number of aphids was recorded on sugar-beet plots surrounded by bare soil. The relationships between the pest and its predators were the least stable in bare soil treatment. Significant pressure of predator activity in all treatments was shown in the first several days of the observation.
The authors have declared that no conflict of interests exist.
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