Fitopatologia Brasileira (2001) 26, 148-152

Marta. A.S. Mendes, Paula M.M.P. Lima, José N.L. Fonseca and Maria F. Santos (2001)
Erradicação de Fusarium oxysporum em sementes de alfafa utilizando termo e quimioterapia
[Eradication of Fusarium oxysporum in alfalfa seeds by thermal and chemical treatments]
Fitopatologia Brasileira 26 (2), 148-152
Abstract: The dry thermal treatment was conducted in a continuous air flux chamber on alfafa (Medicago sativa) seeds with relative humidity under 5%. Seeds underwent a pre-treatment for 60 °C during three or six hours, followed by a treatment at 90 °C for three or six hours. The wet treatment was conducted in water bath, and consisted of a pre-treatment at 40 °C for 10, 20 or 30 min, and then treatments at 50 °C or 60 °C for 10, 20 or 30 min. The chemicals tested were benomyl, thiabendazole, iprodione and thiram, at the dosages recommended by their manufactures and also at three times these dosages. The wet thermal treatment at 40 °C for 20 min, followed by the treatment at 50 °C for 20 min, were effective in the eradication of Fusarium oxysporum, but significantly affected the alfafa seed germination. The dry thermal treatment at 60 °C for 3 h, followed by the treatment of 90 °C for 3 to 6 h, eradicated F. oxysporum without a significant reduction in seed germination. Benomyl was the most efficient chemical product in eradicating F. oxysporum without affecting the alfalfa seed germination.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
(original language: Portuguese)
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Research topic(s) for pests/diseases/weeds:
control - general

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Fusarium oxysporum	Alfalfa/lucerne (Medicago sativa)