The effects of trap crops, flower mixtures and bare fallow, grown as a rotational set aside on nematodes and fungal pathogens in soil
1998
Heijbroek, W. | Munning, R.G. | Swinkels, L.P.J.C. (Institute of Sugar Beet Research, Bergen op Zoom (Netherlands))
Resistant cruciferous green manure crops can suppress the population of Heterodera schachtii and Heterodera trifolii f. sp. betae considerably when drilled after mid-May and grown as a rotational set aside. These effects are comparable to application of soil fumigation with cis-dichloropropene. In sugarbeet growing areas on sandy and light silty soil the root-knot nematodes Meloidogyne hapla, Meloidogyne chitwoodi and Meloidogyne fallax constitute an increasing problem. They can be controlled most effectively by applying a complete bare fallow during set aside. However this can cause serious weed control problems, because a number of them are hosts. Therefore resistant fodder radish varieties are applied, which could act as a trap crop. Fodder radish and also white mustard grown during set aside can suppress the activity of Paratrichodorus spp. better than granular nematicides, preventing the infestation of sugar beets, potatoes and other vegetable crops the following year. Good results of white mustard controlling Rhizoctonia solani in wheat have been reported from Australia. In two bi-annual trials fodder radish, white mustard and oil-seed rape containing high glucosinolate levels have been tested on Rhizoctonia solani AG2-2, a race of blackrot causing serious losses in sugar beets and a number of vegetables.
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