The health status and yield of winter rapeseed (Brassica napus L.) grown in monoculture and in crop rotation under different agricultural production systems

Abstract

In a field experiment, winter rapeseed was grown in 5-year monoculture and in crop rotation (winter rapeseed, winter wheat, field peas, spring wheat and winter rapeseed). Two open-pollinated cultivars (Californium and Castille) and one hybrid cultivar (Nelson) were compared in systems with three levels of agricultural inputs, low input, medium input and high input, characterized by different rates of nitrogen and sulfur fertilization and pesticide use. The severity of sclerotinia rot (Sclerotinia sclerotiorum) and verticillium wilt (Verticillium spp.) on plants, dark spot (Alternaria spp.) and grey mold (Botrytis cinerea) on leaves and pods, as well as dry rot (Phoma lingam) on stems was evaluated during the growing season. The yield of winter rapeseed was calculated. Rapeseed grown after a 4-year break was characterized by less severe symptoms of dark spot on leaves and dry rot on stems, but more severe symptoms of grey mold on leaves and pods. The severity of dark spots on rapeseed pods (in crop rotation) was reduced with an increase in agricultural inputs. Cultivars Californium and Nelson were generally rarely infected by Verticillium spp., their leaves were less infected by Alternaria spp. and stems by Phoma spp. Nelson was the highest-yielding cultivar. ARTICLE HISTORY

Methods for management of soilborne plant pathogens

“…Alfalfa-potato, corn-potato and potato-potato crop sequences were also ineffective against Vericillium wilt. Furthermore, the severity of Verticillium wilt in winter rapeseed grown in crop rotation system (winter rapeseed, winter wheat, field peas, spring wheat and winter rapeseed) was not found to decrease compared to a 5-year monoculture (Cwalina-Ambroziak et al, 2016). Additionally, wheat grown in four different long-term crop rotations including winter wheat, maize, sugar beet and oil radish as pre-crops, had no positive effect on suppression of Fusarium spp.…”

Залежність Урожайності Та Посівних Якостей Насіння Ріпаку Озимого Від Сортів Та Технології Вирощування В Умовах Правобережного Лісостепу України

“…Одним із основних завдань, спрямованих на підвищення економіки аграрного сектору України, є оптимізація заходів, які забезпечують подальший розвиток виробництва олійних культур, зокрема ріпаку озимого. Oднiєю з oснoвних прoблeм oтримaння високого врожаю є мiнiмiзaцiя ризикiв у кoнтeкстi зaбeзпeчeння пeрeзимiвлi пoсiвiв рiпaку oзимoгo [11][12]. Сeрeд бaгaтьoх зaхoдiв, якi впливaють нa рoзвитoк рiпaку озимого, його зимостійкість та продуктивність, oсoбливo вaжливe знaчeння мaють стрoки сiвби, норми висіву, сорти та підживлення рослин [10,[13][14][15].…”

Farm-Scale Biofuel Crop Adoption and Its Effects on In-Basin Water Balance

“…Rapeseed is sown during the rainy season (August), and soil is intentionally compacted and rolled smooth, which can lead to extreme erosion events [29,30]. While previous studies have focused on the negative effects that rapeseed cultivation for biofuel can have on soil processes and water quality [28,29,31], it is the purpose of this study to assess the seasonal shifts in water balance at the farm-scale.…”