The goal of the present work was to produce lactic silage from food wastes. A factorial 2³ experimental design was applied using the following factors and levels: yogurt inoculum concentration (1 and 15%), sucrose (2 and 15%) and temperature (22 and 35 ºC) and as response variable, the soluble nitrogen content (SNC) at the end of the fermentation was considered. The best SNC output was for the treatment with 1 % of inoculum, 2 % of sucrose and temperature of 22ºC. The increase of SNC with regards to its initial content, from 0.17 % to 1.67 % for protein contents (PC) < 5 % corresponded to 882 % and from 0.65 % to 2.36 % for PC > 5 % represented 263 %. It was possible to produce a lactic silage and keep it stable for up to 30 days, which was enough storage time before being sent to a drying process for future use in animal feeding or compost.

Typhlodromus pyri (Sheuten) (Acari: Phytoseiidae) is a phytoseiid mite with a high potential in controlling the false Chilean mite (Brevipalpus chilensis Baker; Acari: Tenuipalpidae). The purpose of this study was to determine the effect of different plant species pollen as a complementary food in the development of T. pyri when its prey is in low levels of availability. Mites were individually placed on black plastic boxes with pollen and maintained at a temperature of 26 ± 2 °C, 70 ± 5% relative humidity (RH), and a photoperiod of 16:8 h (L:D). Postembryonic development of T. pyri was studied in 11 pollen species, as well as in a mixed diet of Hirschfeldia incana (L.) and B. chilensis. Results show that H. incana was the only pollen in which there was no mortality (P > 0.05) along with the control (Oxalis pes-caprae L.). Mean duration from egg to adult with H. incana was 8.70 ± 1.66 d, protonymph 3.27 ± 0.21 d, and deutonymph 2.90 ± 1.45 d (P > 0.05). The mix feeding of T. pyri did not show any significant differences neither in the mean time from egg to adult, nor in mortality by feeding only with B. chilensis. Survival curves of T. pyri fed only with H. incana pollen, combined with B. chilensis, and only with B. chilensis are higher in the first 14 d of life. The sex ratio was not significantly affected by being fed only with H. incana pollen, B. chilensis, or by a combination of both.

Typhlodromus pyri (Sheuten) (Acari: Phytoseiidae) es un ácaro que presenta un alto potencial de uso para el control de la falsa arañita roja de la vid (Brevipalpus chilensis Baker; Acari: Tenuipalpidae). El objetivo de este estudio fue determinar el efecto del polen de diferentes especies vegetales como alimento complementario para T. pyri cuando escasea su presa. Los parámetros post-embrionarios de T. pyri se estudiaron en 11 especies de polen, en una dieta mixta de polen de Hirschfeldia incana (L.) y B. chilensis. Los ácaros se colocaron individualmente sobre cajas plásticas negras con polen a una temperatura de 26 ± 2 ºC y 70 ± 5% de humedad relativa y un fotoperíodo de 16:8 h (L:O). Los resultados muestran que el polen de H. incana fue el único en que no hubo mortalidad (P > 0,05) al igual que en el polen testigo (Oxalis pes-caprae L.). Con polen de H. incana la duración promedio de huevo a adulto fue de 8,70 ± 1,66 d, protoninfa 3,70 ± 1,17 d y deutoninfa 2,90 ± 1,45 d (P > 0,05). Con la dieta mixta no hubo diferencias significativas en el tiempo medio de duración de huevo a adulto, ni en la mortalidad con respecto a la alimentación sólo con B. chilensis. Las curvas de supervivencia de T. pyri alimentado sólo con polen H. incana, en combinación con B. chilensis y sólo con B. chilensis, son altas en los primeros 14 d de vida. La proporción de sexos no es afectada significativamente por la alimentación sólo con polen de H. incana, sólo de B. chilensis, o combinados.