Cultivation of Tagetes patula to control rootrot in narcissus and lily caused by Pratylenchus penetrans
1994
Conijn, C.G.M. (Bulb Research Centre, Lisse (Netherlands))
The endoparasitic nematode Pratylenchus penetrans causes a rootrot in narcissus and lily, resulting in a loss of bulb yield. At present, control of this nematode is generally carried out by application of soil-fumigants. Experiments with Tagetes and other plant species were performed to test alternative, non-chemical control measures. Tagetes patula, cultivated on an infested soil for three months, decreased the population of P. penetrans which resulted in a bulb yield increase of a subsequent narcissus and lily crop. Other pest organisms, e.g., ectoparasitic virus-transmitting nematodes were not controlled. It is concluded that cultivation of T. patula is a good alternative for soil-applied nematicides to control rootrot caused by P. penetrans.
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