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- Manual técnico: a cultura da PitaiaPublication . Trindade, Ana Rita; Trindade, Diamantino; Marques, Natália; Neto, Luís; Duarte, AmilcarO Algarve é uma região com grande tradição frutícola. A alfarrobeira e a laranja são as principais culturas, com mais de metade de toda a superfície ocupada com culturas permanentes. A implementação de novas culturas permite ampliar e diversificar a fruticultura da região, o que lhe adita valor e conduz a uma maior sustentabilidade da atividade agrícola.
- Pitaia: perspetivas e dificuldades de uma “nova” culturaPublication . Trindade, Ana Rita; Reis, Adélia; Sabbo, Luís; Trindade, Diamantino; Paiva, Paulo; Duarte, AmilcarNo Algarve, onde existem condições edafoclimáticas favoráveis ao cultivo de algumas espécies frutícolas exóticas, oriundas de climas tropicais ou subtropicais, surge o interesse no cultivo da pitaia. Esta cultura apresenta altas produções em alguns países e é adequada para terrenos de pequenas dimensões. Ela acaba por satisfazer também a necessidade de diversificar a fruticultura da região. Devido à sua aparência exótica e ao seu alto valor nutritivo, a pitaia tem sido cada vez mais procurada em diversos países, principalmente pelos mercados asiáticos e europeus. Para desenvolver a cultura da pitaia no Algarve foi constituído um grupo operacional cujo objetivo principal visa inovar ao nível das tecnologias de produção para a pitaia vermelha, testando a sua produtividade, rusticidade e qualidade dos frutos. Começou-se por fazer um levantamento da situação desta cultura em Portugal. Estão também a ser instalados vários campos de ensaio/recolha de dados, sobre várias espécies de pitaia vermelha.
- Pitaya as a new alternative crop for Iberian Peninsula: Biology and edaphoclimatic requirementsPublication . Trindade, Ana Rita; Paiva, Paulo; Lacerda, Vander; Marques, Natália; Neto, Luís; Duarte, AmilcarPitaya is one of the fruit species whose demand has increased in recent years due to the numerous health benefits and lucrative price of the fruit and its by-products. In Europe, the Iberian Peninsula and other Mediterranean countries are the ones with favorable climatic conditions for its cultivation. This document describes much of the history of pitaya in the Iberian Peninsula and the difficulties related to its cultivation. A bibliographical survey was carried out on the culture of pitaya in the world, focusing on the edaphoclimatic requirements, and on the possibility of this becoming a consolidated crop in the Iberian Peninsula. The relatively low water requirement of pitaya makes this crop sustainable among crops that require irrigation. In addition, we provide a perspective for use and research of this emerging crop. There has been an exponential growth of scientific publi-cations on pitaya in the last decade; however, much more needs to be researched to know how to increase productivity as well as the sensory quality of fruits in different regions. This sustainable crop is a good option to diversify fruit production in the Iberian Peninsula.
- A citricultura do Algarve e a seca: Proposta de algumas medidas de contenção.Publication . Duarte, Amilcar; Trindade, Ana RitaNas últimas semanas a seca que está a afetar o Algarve (e algumas zonas do Alentejo) tem estado presente na maioria dos órgãos da comunicação social e tem sido alvo de discussão em todo o país. O problema levou a que os diversos órgãos do poder se tenham concentrado em falar e tomar decisões relativamente à falta de água que ameaça a economia e, eventualmente, a qualidade de vida nesta região. Independentemente da atual gravidade do problema e da quantidade de precipitação que, entretanto, ocorra, parece evidente que todos temos de repensar a forma como usamos a água e poupá-la todos os dias, tanto nas nossas casas, como nas nossas atividades profissionais.
- Effect of fruit thinning on fruit quality and alternate bearing of ‘Setubalense’ mandarin (Citrus deliciosa)Publication . Guerreiro, T.; Trindade, Ana Rita; Duarte, Amilcar; Matias, PedroCitriculture plays a major role in agriculture worldwide, especially in the Mediterranean region. However, there are limitations in citrus production. Alternate bearing can be a big problem when it is very intense. Trees produce a heavy yield one year (“on” year) and light ones the next (“off” year). During the “on” year, trees produce many small-sized fruits, while in the “off” year, they produce very few, larger fruits. The small size of the fruits is a limitation, as they are less well accepted in the market. The ‘Setubalense’ cultivar, a traditional Portuguese Mediterranean mandarin (Citrus deliciosa), is recognized for its excellent organoleptic characteristics. Despite this, the issues of alternate bearing and small fruit size are leading to the loss of this cultivar. Fruit thinning is a cultural practice involving the removal of some fruits, while leaving others. This practice can be used to manage alternate bearing and to improve fruit size. However, its impact on the plant is not well understood, whether it affects the plant as a whole or at a more localized level, such as within individual branches. To address this, two experiments were installed in August 2019. In the first experiment thinning involved removing 50% of the fruits from the entire tree. In this experiment, the fruit size and fruit quality were higher in the trees where fruit thinning was performed. In the second experiment, thinning was applied to selected branches, also removing 50% of the fruits. In this case, no significant differences were observed, neither in fruit size nor in fruit quality. Furthermore, fruit thinning did not reduce alternate bearing in either experiment.
- First report of Schlumbergera virus X infecting dragon fruit (Selenicereus spp.) in PortugalPublication . Tomás Marques, Natália; Trindade, Ana Rita; Duarte, AmilcarDragon fruit (Selenicereus spp.) is a fruit crop with a high commercial value. In recent years, there has been an increased interest in this crop in the southern region of Por tugal, with the introduction of new cultivars (Trindade et al. 2023). In June 2022, a survey was conducted to monitor the sanitary status of a plantation in Moncarapacho. Seven two- to three-year-old plants of Selenicereus stenopterus (F.A.C. Weber) D.R.Hunt × S. undatus (Haw.) D.R.Hunt cv. ‘Connie Mayer’ were sampled. The plants exhibited a range of symptoms on their cladodes, including systemic mottling, small irregular chlorotic spots which may also appear ring-shaped, and chlorotic patches. Total RNA was extracted from the symptomatic cladodes and one asymp tomatic plant. The RNA was subjected to reverse tran scription (RT)-PCR using Ribolock (Thermo Scientific, USA), M-MuLV Reverse Transcriptase (Roche, Sigma Aldrich), and Dream Taq DNA polymerase (Thermo Sci entific, USA). The degenerate primer pair Potex5Fw and Potex2RC (van der Vlugt and Berendsen 2002) were used for the amplification of a 584-bp sequence.