TECNICA MOLITORIA Vol. 70 - JANUARY 2019
Evaluation of a cuban zeolite against three stored-product pests
G.S. Germinara - R. Albanese - O.M. Pistillo
In the present study, the insecticidal activity of a Cuban zeolite composed of clinoptilolite and mordenite in the 67.5:32.5 ratio was evaluated against adults of Sitophilus granarius (L.), Rhyzopertha dominica (F.), and Tribolium confusum J. Du Val in laboratory bioassays. Durum wheat samples (100 g) were treated with increasing amounts of zeolite corresponding to the 0, 1, 2.5, 5, 10, 20 and 40 kg per ton doses. For each dose and insect species, three replicates infested with 100 adults were set up. The dead insects were counted every 7 days for 4 weeks. After 4 weeks exposure, the mean insect mortality of adult S. granarius, R. dominica, and T. confusum was respectively 96.0, 90.1, and 88.0% in wheat samples treated with the 2.5 kg per ton dose, and 8.0, 11.0, and 4.0% in untreated control samples. In the dose range tested, the Cuban zeolite effectively reduced the offspring numbers of the three species, particularly in wheat samples previously infested with T. confusum adults.
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