Abstract

MENDEZ OTERO, Andrés Camilo  and  CASTELLANOS GONZALEZ, Leónides. Effectiveness of diatomaceous earth and lime on arionids and agriolimacids. Cienc. Tecnol. Agropecuaria [online]. 2019, vol.20, n.3, pp.579-593.  Epub Sep 10, 2019. ISSN 0122-8706.  https://doi.org/10.21930/rcta.vol20num3art:1587.

The aim of this research is to evaluate the effect of d iatomaceous earth (de) and lime on Arion distinctus under laboratory conditions and on arionids and agriolimacids in the field. Dusting and spraying treatments were carried out to evaluate in the laboratory the effect by ingestion and by contact on the mobility and mortality of the specimens. In the laboratory, three doses of diatomaceous earth (1, 2 and 4 kg/ha), one of agricultural lime (2 kg/ha), and one control were used; and in the field, only the spraying method was evaluated with the same number of variants, but in all cases, doses were doubled. A random block design was used in a 5 x 4 arrangement, and the evaluation was carried out through the trap method, and 20 refuge traps per treatments were placed. Slug populations and the efficiency were established three and seven days after the applications. Tukey’s mean comparison test was used for the populations in the treated plots and in the control. A higher effect was obtained by contact compared to ingestion. In both field and laboratory applications, the highest mortalities were observed after seven days, without significant differences between diatomaceous earth and lime. The results obtained show that de is useful in the control of these mollusk species, and better results are obtained with two applications.

Keywords : Arion distinctus; disease surveillance; mortality; noxious molluscs; slugs.

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