Nematode control efficacy of Bidens pilosa L. var. radiata extracts against Meloidogyne incognita (Kofoid and White) Chitwood and their effects on host plants
2008
Taba, S.(Ryukyu Univ., Nishihara, Okinawa (Japan). Faculty of Agriculture) | Sawada, J. | Shimabukuro, Y. | Moromizato, Z.
Soil drench, bare root or seed dip treatments of tomato (Lycopersicon esculentum Mill.) were used to test the control efficacy of Bidens pilosa var. radiata (Bpr) aqueous extracts against the root-knot nematode Meloidogyne incognita. Although the effects of Bpr extracts on nematode populations were ambiguous, knot or gall formation on roots was clearly suppressed by soil drench or seed dip treatments. Tomato plant growth was reduced by some seed dip treatments, but there was no growth or germination inhibition attributable to Bpr extracts among tested crop species in the Leguminaceae, Solanaceae or Cucurbitaceae. Thus, the possibility of nematode control by Bpr soil drench or seed dip treatments was suggested.
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