ABSTRACT.- The levels of resistance to bacterial wilt (BW) of potatoes caused by Ralstonia solanacearum (Rs) are limited. Solanum commersonii (cmm) is a wild tuber-bearing potato highlighted for its resistance to BW.

ABSTRACT.- Sustainability of most vegetable family farms in Southern Uruguay is threatened by low income and the deterioration of natural resources. This study quantified the effect of the inclusion of different alternatives of livestock production in the structure, and economic and environmental performance of different types of vegetable farms. Based on two farms as case studies, we conducted a model based exploratory study at farm scale. The results suggested that the inclusion of livestock production in vegetable family farms is a key factor in reducing erosion of the cultivated area.

Many temperate grasses are both hyper-accumulators of silicon (Si) and hosts of Epichloë fungal endophytes, functional traits which may alleviate environmental stresses such as herbivore attack. Si accumulation and endophyte infection may operate synergistically, but this has not been tested in a field setting, nor in the context of changing environmental conditions. Predicted increases in atmospheric CO2 concentrations can affect both Si accumulation and endophyte function, but these have not been studied in combination.

ABSTRACT.- Leaf rust (LR) of bread wheat (Triticum aestviumL.), caused by the fungus Puccinia triticinaEriks, is one of the most important diseases in Paraguay, the Southern Cone and worldwide. The economic importance of the disease is clear considering that two or morefungicide applications are necessary to control itinsusceptible cultivars. The best strategy for the management of this disease is through genetic resistance.

Certain animal species become pests or turn invasive, conspiring against other species, the environment, biodiversity, food production and public health. Throughout history, humans have developed different strategies to control or eradicate these problems. Through more effective and affordable tools, and more respectful to the environment and harmless to other species, it will be possible to control more appropriately this kind of threat.

Certain animal species become pests or turn invasive, conspiring against other species, the environment, biodiversity, food production and public health. Throughout history, humans have developed different strategies to control or eradicate these problems. Through more effective and affordable tools, and more respectful to the environment and harmless to other species, it will be possible to control more appropriately this kind of threat.

Many temperate grasses are both hyper-accumulators of silicon (Si) and hosts of Epichloë fungal endophytes, functional traits which may alleviate environmental stresses such as herbivore attack. Si accumulation and endophyte infection may operate synergistically, but this has not been tested in a field setting, nor in the context of changing environmental conditions. Predicted increases in atmospheric CO2 concentrations can affect both Si accumulation and endophyte function, but these have not been studied in combination. © 2023 The Authors.

Grain samples from five wheat and five barley cultivars from different locations and planting dates were examined for the presence of Fusarium species. Fusarium graminearum was the primary species associated with FHB (Fusarium head blight). It comprised 76 % and 60 % of all Fusarium species isolated from wheat grains in 2001 and 2002, respectively. Fusarium graminearum represented 65 % and 56 % of all Fusarium species isolated from barley grains in 2001 and 2002, respectively. The frequencies with which Fusarium species other than F.

ABSTRACT.- Fluorescent Pseudomonas have been extensively reported as effective biocontrol agents and can be used to manage Pythium seedling diseases in alfalfa. An in vivo methodology was developed to evaluate fluorescent Pseudomonas isolates for their ability to suppress disease and promote plant growth in the alfalfa-Pythium pathosystem. The standard method consists of a bioassay performed in growth chamber under controlled conditions of temperature and photoperiod.

ABSTRACT.- Controlling a pest species raises questions about the harmful effects its eradication could cause in ecosystems. Currently, in Uruguay are being analyzed strategies to eradicate the New World Screwworm (NWS), Cochliomyia hominivorax (Diptera:Calliphoridae), an obligatory ectoparasite that causes myiasis in warm-blooded vertebrates, including humans. The loss of a species implies a risk of secondary extinctions and cascading effects that depend on the ecological function of the species and the capacity of the rest of the species with which it interacts to compensate for its loss.