Conference Paper

An approach to mechanical thinning of mandarins

Conference Proceeding cp
2016 American Society of Agricultural and Biological Engineers Annual International Meeting, ASABE 2016
  • Fecha: 01 January 2016
  • ISBN: 9781510828759
  • Source Type: Conference Proceeding
  • DOI: 10.13031/aim.20162457303
  • Document Type: Conference Paper
  • Publisher: American Society of Agricultural and Biological Engineers 2950 Niles Road St. Joseph MI 49085-9659
Nowadays, Mandarin thinning is a task that growers do in some varieties as 'Nadorcott', 'Marisol', 'Oronules', or 'Clemenrubí' because small fruits are rejected by markets. Thinning is done by hand, increasing labor cost and raising total crop production costs. Synthetic auxins applied during the cell division stage produce fruitlet abscission and are a possible method for citrus thinning, but the increasing limitations to the use of synthetic hormones in agriculture, advise to explore other techniques as mechanical thinning. In this way, thinning exploratory tests were done with two hand-held equipments: an electric hand-held fruit remover and a hand-held petrol branch-shaker, over two Mandarin varieties 'Clemenrubí' and 'Clemenules'. Detachment rates of 31 % and 38 % were achieved with the electric device and 52 % and 57 % with the shaker, for 'Clemenrubí' and 'Clemenules' respectively. In the case of 'Clemenrubí', the shaker detached fruitlets of higher size than the electric remover, but in 'Clemenules' the differences were not significant.

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