ABSTRACT. - This study aimed to identify strategies to reduce the distance between under-performing and best-yielding greenhouse tomato crops in the south region of Uruguay. For this purpose, the gap to attainable yield was described and the main causes of yield variability were explored by combining regional agronomic diagnosis and yield gap analysis.

En este trabajo se buscó analizar la sostenibilidad, evaluando las prácticas y tecnologías utilizadas respecto al uso de pesticidas, manejo del suelo, y productividad del cultivo de tomate en invernáculo.

En este trabajo se buscó analizar la sostenibilidad, evaluando las prácticas y tecnologías utilizadas respecto al uso de pesticidas, manejo del suelo, y productividad del cultivo de tomate en invernáculo.

ABSTRACT. - The following agents were reported in Uruguay in stone fruit trees:PNRSV (Prunus necrotic ringspot virus), PDV (Prune dwarf virus), ACLSV (Apple chlorotic leafspot virus), ApMV (Apple mosaic virus) and PLMVd (Peach latent mosaic viroid). PNRSV and PDV are widespread, their plant to plant transmission in the orchard and by seed was confirmed and causes important losses in nurseries and commercial plantations. ACLSV, ApMV y PLMVd are not widely disseminated, and PPV (causal agent of sharka, Plum pox virus) was not found.

ABSTRACT. - Stone fruit trees are affected by different pests that belong to different orders, being Grapholita molestatowards which most of the control interventions in these crops are directed. Management entirely based on insecticides has shown that it is not always effective. The need to use more specific active ingredients requires to be more aware of the biology of the pests that we want to control, especially when they have very narrow application windows to be effective and the products need to be as well less toxic for non-target and beneficial species.

ABSTRACT. - Understanding and ranking main causes of yield variability among farmers, is essential to provide feedback to farmers and extension agents to reduce yield gaps.

ABSTRACT. - Understanding and ranking main causes of yield variability among farmers, is essential to provide feedback to farmers and extension agents to reduce yield gaps.

ABSTRACT - The use of fruit coatings aims to avoid dehydration, minimize the occurrence of spots in the peel and weight loss as well as extend the postharvest life maintaining fruit appearance. The objective of this study was to evaluate the effect of different fruit coatings in fruit quality, weight loss and acetaldehyde and ethanol production in differ-ent mandarin and orange varieties, during postharvest storage.