The influence of biowaste composts on Pythium and rootknot nematodes (Meloidogyne incognita) on tomato plants (Lycopersicon esculentum Mill.) in vivo
1996
Ryckeboer, J. | Coosemans, J. (Katholieke Univ. Leuven (Belgium). Faculteit Landbouwkundige en Toegepaste Biologische Wetenschappen)
The direct influence of several biowaste composts on diseases caused by Pythium spp. and the rootknot nematode Meloidogyne incognita was investigated on tomato plants (Lycopersicon esculentum Mill.) in a growth chamber experiment. The composts used in this experiment were GFT-compost, groencompost and Humotex. Five different compost samples with two application rates, a normal dose (25 per cent v/v) and a high dose (50 per cent v/v), were used. A soil collected from a tomato greenhouse, heavy infested with Pythium and M. incognita, was used as inoculum. Tomato seeds (cv. Moneymaker) were sown on this soil after adding compost. The following parameters were evaluated: the emergence of tomato, the percentage of plants killed by Pythium, the stem attack by M. incognita (disease-index), the dry matter production of the aerial plant parts, and the total number of rootknots (M. incognita) on the root system. The suppression of the dieback caused by Pythium and the stem attack by M. incognita was very obvious after adding compost to the infested soil, in comparison with peat and no compost addition, where all plants died mainly as a result of the Pythium-dieback. But protection of the plant against M. incognita was of short term, because the high dose of compost could not overcome a certain attack of M. incognita on the root system, due to heavy infestation of the potting mixture with this nematode.
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