ISHS Acta Horticulturae 698: VI International Symposium on Chemical and non-Chemical Soil and Substrate Disinfestation - SD2004
RESISTANT SWEET PEPPER ROOTSTOCKS INTEGRATED INTO THE MANAGEMENT OF SOILBORNE PATHOGENS IN GREENHOUSE |
| Authors: | C. Ros, M.M. Guerrero, M.A. Martínez, N. Barceló, M.C. Martínez, I. Rodríguez, A. Lacasa, P. Guirao, A. Bello |
| Keywords: | Phytophthora capsici, Meloidogyne incognita, grafted plants, methyl bromide, 1,3-dichloropropene+chloropicrine, metam sodium, soil disinfestation, organic amendments |
| Abstract:
Chemical and non-chemical alternatives to methyl bromide for control of Phytophthora capsici and Meloidogyne incognita in sweet pepper greenhouses in the Southeast of Spain have not demonstrated equivalent levels of pest control. Use of rootstocks resistant to P. capsici and M. incognita in soils treated with methyl bromide alternatives, has led to the selection of virulent populations of M. incognita, but not P. capsici. In commercial greenhouses, the use of resistant rootstocks in soils with 1,3-dichloropropene+chloropicrin at 25 g m-2, metam sodium at 150 g m-2, or biofumigation plus solarization (fresh sheep manure plus chicken manure) were compared with methyl bromide (98:2) at 30 g m-2 and untreated soil. Grafted plants in soil treated with 1,3-dichloropropene+chloropicrin resulted in levels of pest control similar to methyl bromide. Soil treated with metam sodium had similar levels of disease control, a higher incidence of M. incognita, and reduced plant growth and marketable yield. Grafted plants in biofumigated and solarized soils were not affected either by P. capsici or by M. incognita and marketable yield was higher than with non-grafted plants. Some grafted plants were infected only by M. incognita (the virulent population that had been selected) but not by P. capsici in non-disinfested soil. | |
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