Crop Rotation and the Occurrence of Fungal Diseases in Potatoes

Comparison of Conventional, Integrated and Organic Potato Production in Field Experiments in Finland

“…All results speak for the positive effects of rotations which are mainly attributed to the restriction of nematode, pathogenic fungi and bacteria populations (DeBoer, 1989;Phillips, 1989;Umaerus et al, 1989). Planning of an optimal rotation for any given situation is, however, complicated because of many unknown, even contradictory effects (Celetti et al, 1989a,b;Sieczka, 1989;Umaerus et al, 1989). It is not possible to evaluate to what extent the lack of rotation in these trials might have influenced the results and their interpretation.…”

“…Hoekstra (1989), Lamers (1989) and Vos & van Loon (1989) have reported rotational differences in potato yields. All results speak for the positive effects of rotations which are mainly attributed to the restriction of nematode, pathogenic fungi and bacteria populations (DeBoer, 1989;Phillips, 1989;Umaerus et al, 1989). Planning of an optimal rotation for any given situation is, however, complicated because of many unknown, even contradictory effects (Celetti et al, 1989a,b;Sieczka, 1989;Umaerus et al, 1989).…”

“…Chemical contryl of soil-borne diseases and nematodes is not allowed in Finland and will be more and more restricted elsewhere (van Loon et al, 1994). Thus, a good rotation programme is the basic measure to keep harmful populations in balance (Phillips, 1989;Keller, 1989), although our knowledge of the population dynamics of most soil-borne diseases is still too limited for systematic use of ideal crop sequences (Umaerus et al, 1989). In these trials, the heavy scab infection was the main problem and it occurred regardless of the cropping system.…”

Could Land Abandonment with Human Intervention Benefit Cropland Restoration? From the Perspective of Soil Microbiota

“…Moreover, a relevant study showed that spontaneous grass could provide fungal pathogens with more chances for survival than green manure which increased crop disease risk in the short term [64]. In our study, the disease resistance of forage grass may be because new vegetation changed the monoculture, which altered the fungal community composition and evolution path [77]. The interspecies competition of fungi provides more possibilities for fungal disease resistance.…”

Managing Crop Disease through Cultural Practices

“…Crop rotation is less suitable for controlling root-inhabiting pathogens that survive saprophytically or can exist for long periods in soil, for example, pathogens with tough survival structures such as Rhizoctonia solani, Sclerotinia sclerotiorum and Pythium spp. (Sumner, 1982;Umaerus et al, 1989). S. sclerotiorum is among the most non-specifi c and successful plant pathogens and can attack a wide range of crops including oilseed rape (canola), sunfl ower, fl ax, pea, bean, clover and potato (Morrall & Dueck, 1982).…”