1. Growth, Invasion and Root Diffusate Production in Tomato and Black Nightshade Inoculated With Potato-Root Eelworm
2. J M Edmonds, and J A Chweya . 1997 . Black nightshades,Solanum nigrumL, and related species. Promoting the conservation and use of underutilized and neglected crops , 15. 113 pp.Italy, Rome: International Plant Genetic Resources Institute.
3. Hatching of potato cyst nematodes in root diffusates collected from twenty-five potato cultivars
4. R Folkertsma . 1997 . Genetic diversity of the potato cyst nematode in the Netherlands . Ph.D. Thesis , Wageningen Agricultural University, 88 pp.