Resumo

HERNANDEZ-JUAREZ, Agustín et al. Nematicidal activity of commercial organic products, against Ditylenchus dipsaci (Tylenchida: Anguinidae) under laboratory conditions. Rev. Mex. Cienc. Agríc [online]. 2015, vol.6, n.spe11, pp.2247-2252. ISSN 2007-0934.  https://doi.org/10.29312/remexca.v0i11.807.

The bulb and stem nematode Ditylenchus dipsaci Kühn, 1857 (Tylenchida: Anguinidae), has become a serious problem in the cultivation of garlic Allium sativum L. 1753 (Liliales: Liliaceae); whose form of control is the application of chemical nematicides to the infested soil; however, cost, and the phytotoxicity of these residual nematicides, are limiting its application. It was evaluated in five treatments with four replications, organic based products chitosan and the other based on various organic components of the nematode D. dipsaci, under laboratory conditions. Soil samples were collected in the cultivation of garlic, var. Tacuascaro; established at the Universidad Autonoma Agraria Antonio Narro and, the nematodes were extracted by the Baermann funnel method. After 24 h of planting the funnel, the initial nematode population was recorded and immediately returned to the funnel. Then, the treatments were evaluate directly on the funnel and 24 h after the final population (live) were counted. Mortality was assessed by the difference between initial- population and final-population and analysed by ANOVA. The evaluation showed activity treatments to control D. dipsaci with mortality rates ranging between 86.8 and 97.5%, with higher mortality in the product based on chitosan at a dose of 4 L/ha with 97.5% and based on various organic compounds at a dose of 20 L/ha with 97.3%; which indicates that these products are useful alternatives for controlling D. dipsaci in any type of agriculture, and can replace toxic fumigants, by their organic-biological nature.

Palavras-chave : Allium sativum; Ditylenchus dipsaci; bulb nematode; nematicides; stem nematode.

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