Using crop rotation to control Meloidogyne hapla chitwood and improve marketable carrot yield

被引:17
作者
Belair, G [1 ]
Parent, LE [1 ]
机构
[1] UNIV LAVAL,DEPT SOIL SCI,QUEBEC CITY,PQ G1K 7P4,CANADA
关键词
northern root-knot nematode; carrot; onion; barley;
D O I
10.21273/HORTSCI.31.1.106
中图分类号
S6 [园艺];
学科分类号
0902 ;
摘要
The influence of various crop rotations on population densities of Meloidogyne hapla, the northern root-knot nematode, and subsequent carrot yields was studied in organic soil under field conditions. Seven 3-year sequences with barley (Hordeum vulgare L.), carrot (Daucus carota L.), onion (Allium cepa L.), of weedy fallow, all with carrot as the third-year crop, were replicated six times in a completely randomized block design. Carrot monoculture, two seasons of weedy fallow, or carrot followed by onion resulted in high M. hapla population densities and severe root damage on carrot the third year. Barley followed by onion or onion followed by barley harbored low M. hapla population densities and provided the highest yields, with 56.8 and 47.2 t marketable carrots/ha, respectively, compared to 2.2 t . ha(-1) in the carrot monoculture. A single crop of barley reduced nematode population densities and provided 88% and 73% marketable carrot roots in the subsequent years. High M. hapla population densities and the high proportion of culls recorded in plots in weed fallow emphasize the importance of an effective weed management program for successfully using crop rotation against root-knot nematode in muck-grown carrot.
引用
收藏
页码:106 / 108
页数:3
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