Sequential application of budbreak promoters in ‘Baigent’ apple trees under anti-hail nets in orchards of southern Brazil

ISHS Secretariat
Sequential application of budbreak promoters in ‘Baigent’ apple trees under anti-hail nets in orchards of southern Brazil

Leonardo Soldatelli Paim is an agronomist, who graduated from the Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil (2016). After graduation, he started his master’s studies in plant science at the same institution (2017), working through a well-established partnership with the Brazilian Agricultural Research Corporation, Grape and Wine (EMBRAPA) and the State University of Rio Grande do Sul (UERGS). As a member of the ‘Management and physiology of temperate fruit trees’ research group, formed by graduate, postgraduate students and researchers, his goal is to develop and improve the cultivation of temperate fruit crops, i.e., berries, peaches, plums, apples, under the southern Brazilian climatic (tropical-subtropical) and orchard management conditions. Apple is one of the most important temperate fruit crops cultivated in Santa Catarina and Rio Grande do Sul States; their annual production of ~ 1 million tons is more than 95% of the Brazilian total. A high incidence of hailstorms over the last few years in the apple-producing region of southern Brazil, however, is leading to an increasing use of hail nets, the most effective method of protecting against hail damage. In spite of its efficiency, hail nets promote micrometeorological alterations in the orchard, changing the plant-environment relationship and intensifying the vegetative growth of the plants. As a consequence, this greater vegetative growth may hamper budbreak induction, necessitating that the standard use of budbreak promoters (in a single application) be optimized. Application of budbreak promoters is a necessary practice to compensate for part of the physiological chilling requirement to overcome dormancy of ‘Gala’ apple trees and other high-chill deciduous fruit trees cultivated under the southern Brazilian mild winter climate. According to the author’s goals, the awarded presentation ‘Sequential application of budbreak promoters in ‘Baigent’ apple trees under anti-hail nets in orchards of southern Brazil’ is a part of his master’s research aiming to improve budbreak induction of ‘Gala’ cultivar, under black hail net, by using two applications of budbreak promoters, instead of the standard single one.

Leonardo Soldatelli Paim won an ISHS Young Minds Award for the best oral presentation at the XI International Symposium on Protected Cultivation in Mild Winter Climates & I International Symposium on Nettings and Screens in Horticulture in Canary Islands, Spain, in January 2019.

Leonardo Soldatelli Paim, Federal University of Rio Grande do Sul, Faculty of Agronomy, Av. Bento Gonçalves, 7712, 91540-000 Porto Alegre, Rio Grande do Sul State, Brazil, e-mail: leonardo.paim@ufrgs.br

The article is available in Chronica Horticulturae

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apple
netting
hail
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Young Minds Award Winners