Das Ph�nomen G�rtelschorf des Jahres 2002 an Zuckerr�ben?Auswirkungen und m�gliche Ursachen

Differentiation of the disease caused by Aphanomyces cochlioides and girth scab on sugar beet roots - a review

“…Petersen and Schlinker (2003) found that unquestionably the favourable reason for girth scab was wet weather. These kinds of conditions were observed in Poland and in Germany at that time.…”

“…Benada et al (1984) suggested in the description of the disease, printed in the handbook of sugar beet pests and diseases, the causal agents of girth scab are streptomyces scabies, s. nigrificans, and s. intermedius; Hinfner and Homonnay (1966) suggested that unfavourable soil conditions are the cause of the disease. Symptoms classified as girth scab (Figure 1) have frequently been observed within Poland and Germany since 2001, although severe symptoms with such diagnosis were noticed in Bavaria also in 2002 and 2010 (Piszczek 2002(Piszczek , 2004Petersen & Schlinker 2003;Moliszewska 2009;Nechwatal et al 2012). The year 2001 was critical due to rainfall -the yearly amount of rainfall was 662.3 mm (304.5 mm/June-August) in some parts of Poland (Moliszewska 2009).…”

“…Throughout the last dozen years or more, sugar beet crops have been affected by root rot with symptoms recognisable as a girth scab disease described in phytopathological literature (Piszczek 2002;Mär-lander et al 2003;Petersen & Schlinker 2003;Piszczek 2004). These symptoms are illustrated as doi: 10.17221/152/2015-PPS a root rot.…”

“…The year 2001 was critical due to rainfall -the yearly amount of rainfall was 662.3 mm (304.5 mm/June-August) in some parts of Poland (Moliszewska 2009). Petersen and Schlinker (2003) reported that at that time, in Germany, the girth scab was a causal agent of about 50% yield reduction of sugar beets. Yield losses were dramatically huge also in Poland, so sugar companies decided to start investigations to resolve the problem.…”