Abstract

RODRIGUEZ-LEDESMA, Yandy et al. Control of Sitophilus zeamais Motschulsky with marble powder in stored corn grains. Pastos y Forrajes [online]. 2017, vol.40, n.4, pp.296-301. ISSN 0864-0394.

The objective of this research was to evaluate, under laboratory conditions, the effectiveness of the inert white marble powder as mineral pesticide in the control of Sitophilus zeamais, in corn grains (Tusón variety) stored to be used as feedstuffs. In the experiments (anti-insect effect, weight loss of the grains and repellent effect of the marble powder) a completely randomized design was used, with four treatments, three doses of powder (0,46; 0,81 and 1,74 g) and a control (without powder), with 12 replicas each; and in the case of the data from the first two experiments variance analysis was applied. The three tested doses of the inert white marble powder exerted an anti-insect effect on S. zeamais, because they caused it a mortality percentage higher than 70 % on the fourth day after application, and 100 % was reached on the sixth day. The highest dose (1,74 g) propitiated that there was no weight loss of the grains due to affectation caused by the coleopteran, and, in addition, its repellent effect was corroborated. Thus, this initial study can be a starting point to confirm the potentialities of marble powder for its use in the management of such insect in grain (especially corn) storehouses or other facilities aimed at the preservation of feedstuffs.

Keywords : Zea mays; pests of stored products; repellents.

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