Graft incompatibility is one of the main factors limiting european pear production in Brazil. At present, there is no clear indication of the best combination(s) of european pear cultivars and quince rootstocks for graft compatibility. The study evaluated the graft compatibility for combinations of european Abbè Fetel, Rocha and Williams pear cultivars grafted onto the EMC quince rootstock. The experiment was performed in a commercial european pear orchard in the Urupema municipality, in State of Santa Catarina, during the 2011/12, 2012/13 and 2013/14 growing seasons. The plant growth variables comprised the section increment (mm) in the trunk diameter in the graft union region of cultivars and rootstocks; difference in the diameter of the graft for cultivars and rootstocks; “translocated” incompatibility; “located” incompatibility and the vascular connection in the graft union region, which was assessed by immersing the bases of the plants in a 0.08% succinic acid solution. There were “located” and “translocated” incompatibility between the european Williams pear cultivar and the EMC rootstock based on the vascular discontinuity in the graft union region, which prevented the translocation of succinic acid stain. Thus, the Williams/EMC combination is considered incompatible and it is not recommended for use in commercial orchards. The Rocha/EMC and Abbè Fetel/EMC are considered partially incompatible combinations and showed good development eight years after planting.

A cultura da pereira (Pyrus communis) possui grande potencial de expansão no sul do Brasil devido às condições climáticas e solo. A carência de informações a respeito da(s) melhor(es) combinação(ões) de cultivares copa de pereira europeia e portaenxertos, quanto ao aspecto vegetativo e potencial produtivo, tem limitado o cultivo. O objetivo do trabalho foi avaliar a influência de cultivares copa de pereira europeia e portaenxertos de marmeleiro (Cydonia oblonga) sobre o vigor e variáveis de plantas. Os experimentos foram conduzidos em pomares comerciais da cidade de Fraiburgo, Estado de Santa Catarina, durante os ciclos de cultivo 2008/09, 09/10 e 10/11. As cultivares avaliadas foram 'Packham's Triumph', 'Santa Maria', 'Rocha' e 'Abbè Fetel' e os portaenxertos de marmeleiro EMC e Adams. O espaçamento de plantio foi de 0,3m entre plantas e 4m entre linhas. As variáveis analisadas foram: a. incremento de altura de plantas (m); b. incremento de volume de copa (m³); c. incremento de diâmetro do tronco da cv. 'copa' (mm); d. incremento de diâmetro do tronco do portaenxerto (mm); e. diferença de diâmetro do tronco entre a cultivar copa e o portaenxerto (mm); f. índice de fertilidade (no de gemas cm-1); g. massa fresca média total acumulada do material vegetativo das três podas de inverno (kg); h. diferença cumulativa entre a massa fresca e a massa seca dos ramos podados (kg). As diferentes combinações de cultivares e portaenxertos interferiram nas diferentes variáveis analisadas. As combinações Abbè Fetel e Rocha sobre marmelo Adams, foram significativamente mais vigorosas em termos de incremento de diâmetro do tronco da cultivar copa, incremento de altura de plantas, incremento de volume de copa e massa fresca média total acumulada do material vegetativo das podas de inverno dos três anos. A combinação Santa Maria sobre marmelo Adams apresentou vigor intermediário significativo de plantas de acordo com o incremento em volume de copa, diferença de diâmetro do tronco entre a cultivar copa e do portaenxerto, sendo mais indicada para uso comercial, devido ao maior equilíbrio proporcionado entre parte vegetativa e produtiva da planta, nas condições edafoclimáticas experimentais do Sul do Brasil.

The objective of this study was to evaluate the in vitro establishment of 'Xavante' blackberry under different conditions of plant luminosity and concentrations of salts of MS medium. The maintenance of 'Xavante' blackberry plants in the absence of light, with the use of MS medium with salt concentrations of 75% and 100% reduce bacterial contamination and the percentage of explants oxidized and provide the highest percentage of surviving and established explants. The 50% salt dilution in MS medium is not recommended when plants are subjected to the absence of light due to the high percentage of oxidized explants and consequently lower survival and establishment.

Information on root development is an essential tool capable of identifying, among plants of a species, the one that has the greatest capacity to potentiate growth and development characteristics in its aerial part. The aim of this study was to characterize the distribution of the root system throughout the soil profile of different European pear cultivars and quince rootstock combinations on medium plant density systems (2500 plants ha-1). The combinations evaluated were: Abbè Fetel/Adams, Clapp´s Favourite/EMA, Santa Maria/Adams, Rocha/Adams, Decana du Comice/Adams, Packham´s Triumph/EMA, Packham´s Triumph/Adams and Conference/ Adams. In relation to effective depth, it was observed that up to 40 cm deep, 80% of the total root length and 83% of root concentration were found for all combinations. For the effective distance, it was observed that 80% of the total root length is distributed in up to 80 cm for all combinations, except for Clapp’s Favourite/EMA, whose actual distance was 100 cm. It was observed that the average of six combinations, 86% of root growth in the horizontal distance is located up to 80 cm.

The pear consumption in Brazil is significant and the country is dependent on the import of this fruit to meet the internal market. The aim of this study was to evaluate the vegetative growth of European pear trees grafted on quince with two application forms of nutrients. The study was conducted during the 2012/13, 2013/14 and 2014/15 harvests, in the experimental area of the Universidade do Estado de Santa Catarina / UDESC, in Lages. The cultivars used were Rocha, Santa Maria and Abbé Fétel. The quinces were ‘Adams’ and ‘EMA’. The application forms of the nutrients were conventional and fertigation. The experiment was carried out in a randomized block design and the arrangement of treatments was sub subdivided plots. The application form of nutrients and rootstocks of quince little influenced on the vegetative growth of the plants, being more influenced by the scion in the soil conditions of this study.

This study aimed to evaluate the vegetative, productive, and fruit quality parameters of the European pear cultivars ‘Rocha’ and ‘Santa Maria’ under the training systems of Tall Spindle, with branches bent at an angle of 45° (Tall Spindle—45°) and 90° (Tall Spindle—90°) to the leader, and Bi-axis. The evaluation was conducted over the 2016/2017 to 2022/2023 growing seasons in the highland region of southern Brazil. Both Tall Spindle systems significantly improved the yield and productive efficiency compared to the Bi-axis system, with ‘Santa Maria’ showing superior performance under Tall Spindle—90°. While ‘Rocha’ exhibited no significant differences between Tall Spindle systems, it benefited from better vigor control and reduced biennial bearing when trained under the Bi-axis system. Fruit quality parameters were consistent across training systems, indicating Tall Spindle—90° as an optimal choice for productivity and stability in ‘Santa Maria’. These results emphasize the adaptability and efficiency of training systems for pear orchard management.