Hatch and reproduction of Globodera tabacum tabacum in response to tobacco, tomato, or black nightshade

• Published in: Journal of nematology Vol. 27; no. 3; pp. 382 - 386
• Main Author: Lamondia, J A
• Format: Journal Article
• Language: English
• Published: United States Society of Nematologists 01.09.1995
• Subjects: age; eclosion; edad; exsudat; exudados; exudates; Globodera; hatching; host parasite relations; host-parasite relationships; lycopersicon esculentum; nematode des plantes; nematodos de las plantas; Nicotiana tabacum; plant age; plant nematodes; plant parasitic nematodes; racine; raices; relaciones huesped parasito; relation hote parasite; reproduccion; reproduction; root exudates; roots; Solanum lycopersicum var. lycopersicum; Solanum nigrum; Solanum nigrum; nematode; Lycopersicon esculentum; hatch stimulation; root exudates; Nicotiana tabacum; tobacco cyst nematode
• ISSN: 0022-300X; 2640-396X

The effects of broadleaf tobacco, tomato, and black nightshade on juvenile hatch and reproduction of Globodera tabacum tabacum were determined in laboratory and greenhouse experiments. Root exudates from nightshade stimulated greater egg hatch than those from either 'Rutgers' tomato or '86-4' tobacco. Hatch was greater at higher proportions of root exudates for all three plant species. Root exudates from plants greater than 3 weeks old stimulated more hatch than younger plants. No regression relationships existed between plant age and nematode hatch. In other experiments, hatch from eggs in cysts was higher for tomato and nightshade after 10 weeks in greenhouse pots compared to tobacco and bare soil. Numbers of second-stage juveniles in eggs in cysts produced from a previous generation on the same host were highest on nightshade and less on tomato and tobacco. Cysts of variable age recovered from field soil had increased hatch in both root exudates or water compared to recently produced cysts from plants in growth chambers. Globodera t. tabacum may be subject to both host and environmentally mediated diapause.