Integrated Control of Meloidogyne incognita on Tomato Using Organic Amendments, Marigolds, and a Nematicide. J. S. Ruelo, Postdoctoral Research Fellow, Plant Pathology, Asian Vegetable Research and Development Center, P.O. Box 42, Shanhua, Tainan 741, Taiwan, ROC. Plant Dis. 67:671-673. Accepted for publication 30 November 1982. Copyright 1983 American Phytopathological Society. DOI: 10.1094/PD-67-671.

Control methods using chicken manure, compost, aldicarb 10G, and marigolds (Tagetes patula cv. Janie) were evaluated on nematode-resistant tomato cultivar Anahu R-2 and susceptible cultivar TK70. Significant differences among treatments were not observed on the resistant host. The resistance of Anahu R-2 was adequate to protect plants from nematode attack. None of the plants, treated or untreated, had a galling index higher than 0.5 (rating scale, 0–5). In contrast to Anahu R-2, TK70 demonstrated marked responses to the different combination schemes tested. Plants treated with manure; manure and aldicarb; and marigolds, aldicarb, and compost were identified as the three best yielders with significant increases in plant growth seen through top growth, root weights, and dry matter but not plant height. In treatments where aldicarb was involved, galling of the root system was completely controlled; where precrop marigolds were used without aldicarb as part of the follow-up treatment, significant reduction of root galling occurred but complete control was not effected. The field experiment using resistant and susceptible hosts confirmed previous observations that the combined treatment of manure and aldicarb could give good control of M. incognita and could result in significant increases in plant growth and yield.