ABSTRACT.- Honey bees (Apis mellifera L.) construct a structured nest with separated areas for the brood, pollen and honey that optimizes the functioning of the colony. However, in the Eucalyptus grandis plantations, bees tend to store a great amount of pollen and nectar in the brood area during the flowering period, reducing the space for the queen's egg laying. Through the python informatic program "CombCount" and an image program, the capped brood area and the proportion of cells occupied by brood, pollen or nectar during the flowering period of E.

ABSTRACT.- The global rise in afforestation highlights the need for improved forestry practices, underscoring the demand for enhanced management strategies and research. Integrated intercropping systems offer sustainable solutions, promoting biodiversity and ecosystem health. This research explored the long-term effects of weed control and row spacing on eucalyptus (Eucalyptus grandis) and pinus (Pinus taeda), intercropped with switchgrass (Panicum virgatum), within a Uruguayan setting.

ABSTRACT.- We reviewed the history, epidemiology, clinical signs, pathology, pathogenesis, treatment, control, and prophylaxis of Sorghum poisoning in livestock. Economic losses in the livestock industry associated with sorghum have been reported since the 19th century. Hyperacute/acute poisoning associated with cyanide (HCN) or nitrate/nitrite frequently occurs in ruminants that consume high quantities of growth and regrowth sorghum after drought, followed by rainfall, respectively.

ABSTRACT.- Erigeron species form a complex of weed species that have evolved herbicide resistance in Uruguay. Genetic studies using seeds from different biotypes are frequently conducted to understand how this evolution occurred. However, these seeds are extremely small, and there is limited information available on their long-term conservation in germplasm banks.

ABSTRACT.- Despite its sociocultural and economic importance, dairy farming in Uruguay has not experienced a significant increase in cattle stocks in recent decades, partly due to low reproductive efficiency and a high risk of calf mortality. Neospora caninum is one of the primary abortive pathogens in dairy cattle; however, the economic losses caused by neosporosis in Uruguay remain uncalculated. This study aimed to assess the direct annual economic losses for the primary dairy sector (dairy farmers) due to abortions resulting from bovine neosporosis in the Uruguayan herd.

ABSTRACT.- The entomopathogenic fungus Beauveria bassiana is widely used as a biocontrol agent, but its efficacy varies depending on the target insect species. Piezodorus guildinii, a major soybean pest, exhibits low susceptibility to B. bassiana. Thus, biocontrol of this pest requires improving virulence of B. bassiana. Here, we used genomic and transcriptomic analyses to identify novel genes associated with the enhanced virulence of B. bassiana strain ILB308 when exposed to the insect epicuticular hydrocarbon n-pentadecane.

ABSTRACT.- Bovine babesiosis and anaplasmosis are primarily transmitted by the biological vector Rhipicephalus microplus. However, Anaplasma marginale may also be mechanically transmitted through the bites of haematophagous flies such as tabanids. While biological transmission by ticks is the predominant route for Babesia species, some reports suggest that mechanical transmission via fomites contaminated with merozoites may occur. Additionally, mechanical vectors such as tabanids may contribute to the spread of the disease.

ABSTRACT.- Agriculture is transitioning towards more sustainable ways of producing food, fiber, and biofuels, with practices aimed at conserving soil resources by prolonging soil occupation with cash or cover crops and balancing the proportion of cereals and winter legumes when increasing the number of crops in the rotation. Likewise, closing nutrient biogeochemical cycles is critical, particularly for N, which requires adjusting fertilizer rates to avoid surplus or soil mining.

ABSTRACT.- Context: The greenness index of the ear-leaf in maize (Zea mays L.) has been used to assess crop nitrogen (N) status, but it may not accurately predict yield responses to late N fertilization. Objective: This study aimed to i) analyze differences in the greenness index and N sufficiency index (NSI) across maize canopy leaf positions and their relationship with soil N availability, N nutrition index (NNI), and grain yield, and ii) evaluate the accuracy of NSI determined in different leaf positions in predicting the grain yield response to N fertilization at silking.

ABSTRACT.- The purpose of this experiment was to evaluate the transference of passive immunity (TPI) and growth achieved by calves born to dams with low or high SCC at dry-off and fed with colostrum from cows with low or high SCC at dry-off. Forty multiparous (3.2 lactations; SD = 1.1), dry, and pregnant Holstein cows were used. © 2025 American Dairy Science Association