SciELO - Scientific Electronic Library Online

vol.24 special issue 2Polyploid induction of Eucalyptus dunnii Maiden to generate variability in breeding programsOne health: considerations in the International Year of Plant Health author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand



Related links


Agrociencia (Uruguay)

Print version ISSN 1510-0839On-line version ISSN 2301-1548


BASSO, C.; CHIARAVALLE, W.  and  MAIGNET, P.. Effectiveness of Trichogramma pretiosum in controlling lepidopterous pests of soybean crops. Agrociencia Uruguay [online]. 2020, vol.24, n.spe2, e419.  Epub Dec 01, 2020. ISSN 1510-0839.

Controlling lepidopteran pests in soybean in Uruguay usually involves the application of chemical insecticides with risks to health and the environment. As part of an inundative biological control program using Trichogramma pretiosum, a plot trial at three sites located in the department of Soriano (Uruguay), in the 2019-2020 growing season, compared this conventional practice with different doses of the egg parasitoid, number of release capsules per hectare, different number of releases in the culture cycle and ground and aerial releases (with or without release capsules). Using the cloth method, the number of larvae per linear meter and the defoliation percentage were evaluated over 6 weekly samplings. Although the best results were obtained with the application of chemical insecticides, two releases of T. pretiosum by terrestrial methods, 20 days apart, or 4 weekly applications by means of a drone, reached the best results below the thresholds of sanitary intervention, both options with 200,000 parasitoids per hectare. This biological tool can differentiate and value Uruguayan agricultural production.

Keywords : egg parasitoid; inundative biological control; Anticarsia gemmatalis; Rachiplusia nu; cloth method.

        · abstract in Spanish | Portuguese     · text in English     · English ( pdf )