ABSTRACT.- BACKGROUND: Piezodorus guildinii (Westwood, Hemiptera: Pentatomidae) causes economic losses in soybean crops by diminishing productivity, impacting grain size, oil content, and germination power. RNA interference (RNAi), a conserved gene regulation process initiated by double-stranded RNA (dsRNA), may be used as a safe technique in integrated pest management strategies. Conjugating dsRNA with cationic polymers, which protect dsRNA from degradation has shown to enhance this response. This study aims to assess the impact of dsRNA administration on the viability of P.

ABSTRACT.- In a beef cattle breeding farm located in northern Uruguay, an Aberdeen Angus calf was born with complex anomalies. The offspring was sired by one of the bulls of the farm. The calf died shortly after birth, displaying multiple malformations at external examination, including agenesis of the lumbar, sacral and coccygeal vertebrae and spinal cord and arthrogryposis of both pelvic limbs, characteristic of perosomus elumbis (PE).

ABSTRACT.- Using biomass of forest origin to obtain solid, liquid, and gaseous fuels has demonstrated its potential both at an experimental level and in commercial situations. This framework evaluated Eucalyptus benthamii, E. dunnii, and E. grandis planted at densities of 2220, 3330, 4440, and 6660 trees per hectare 56 months after planting. The chemical composition and heating value of biomass fractions were evaluated. The LHV value (KJ/Kg) of the bark was 17,227, 16,813, and 16,167; the leaves 22,491, 23,031, and 21,358; the wood 18,725, 18,577, and 18,828 for E. benthamii, E.

ABSTRACT.- Congenital neoplasms are rare and sporadic in cattle and can cause losses due to abortions and perinatal or neonatal deaths. The etiopathogenesis of congenital tumors in bovine fetuses and neonates is largely unknown, and their diagnosis is often challenging.

ABSTRACT.- BACKGROUND. Biological control methods involving entomopathogenic fungi like Beauveria bassiana have been shown to be a valuable approach in integrated pest management as an environmentally friendly alternative to control pests and pathogens. Identifying genetic determinants of pathogenicity in B. bassiana is instrumental for enhancing its virulence against insects like the resistant soybean pest Piezodorus guildinii. This study focused on comparative genomics of different B.

ABSTRACT.- The study aimed to evaluate the effect of 2 finishing diets (F: pasture or grain) and 4 meat aging methods (AM) on physicochemical traits, microbiological loads, and sensory attributes of beef, with aging methods as follows: wet aging (WA) for 40 d; dry aging in the bag (DAb) for 40 d; dry bag for 20 d + wet 20 d (DW); and wet 20 d + dry bag 20 d (WD). Sixty striploins, consisting of the right and left Longissimus lumborum (LL) muscle, from British crossbred steers, were employed, with 15 pairs of striploins obtained from pasture-finished and 15 pairs from grain-finished diet.

ABSTRACT.- Genetic trends were estimated for production and reproduction traits in an Uruguayan Merino genetic nucleus. Two consecutive periods with different selection objectives were studied. During the first period (1999-2010), the selection objective of this flock focused on reducing fibre diameter (FD), while allowing for a slight loss in clean fleece weight (CFW). From 2011 to 2018, the breeding objective was shifted and then focused on maintaining FD, while increasing both CFW and live weight (LW).

ABSTRACT.- In 2021, bovine polyomavirus 1 (BoPyV1; Polyomaviridae, Epsilonpolyomavirus bovis) was associated with nephritis in an aborted bovine fetus in Uruguay, with renal lesions resembling those typical of polyomavirus-associated nephropathy of humans. Given that little is known about the epidemiology of BoPyV1 infection in cattle, we screened for BoPyV1 in urine samples collected in 2015-2017 from beef and dairy herds from 12 of the 19 departments in Uruguay. We tested for BoPyV1 by PCR in 156 urine pools and 249 individual urine samples from 42 herds.

ABSTRACT.- The international spread of the myrtle rust pathogen, Austropuccinia psidii, can be largely attributed to the "pandemic" biotype that has more than 450 host species. However, within South America, the putative native range of A. psidii, multiple biotypes have been characterised, each with a restricted known number of hosts. These biotypes may pose a significant biosecurity threat to countries already affected by the pandemic biotype.

ABSTRACT.- Tuberculosis is a global public health concern, and understanding Mycobacterium tuberculosis transmission routes and genetic diversity of M. tuberculosis is crucial for outbreak control. This study aimed to explore the genomic epidemiology and genetic diversity of M. tuberculosis in Ecuador by analyzing 88 local isolates and 415 public genomes from 19 countries within the Euro-American lineage (L4).