Comunicação científica qualidade de frutos da pereira-japonesa colhidos em duas regiões de Santa Catarina, Brasil

Abstract

THE QUALITY OF JAPANESE PEAR FRUITS HARVESTED IN TWO DIFFERENTS REGIONS OF SANTA CATARINA STATE, BRAZILABSTRACT -The study was conducted in Caçador (1067 units of cold-UF during vernalization) and São Joaquim (1999 UF) in 2006/07 and 2007/08 seasons, in order to compare the quality of fruits produced by different cultivars of Japanese pear, in two locations and harvested at different stages of maturation. The defi ciency in the quantity and quality of the cold during vernalization trigged the fl owering without the presence of leaves up to "J" stage in the cv. Kousui, affecting the initial development of the fruits. It also was responsible for a small number of fl ower buds per plant and a low quantity of fl owers per bud. Regions with appropriate amount of cold during the vernalization require more intense thinning due to the greater fruit set per plant. The harvest of fruits before they reach the ideal point of physiological maturity involves the production of fruits with lower weight, lower total soluble solids, hardiness and less palatable fruits. Harvesting the fruits after the point of optimum harvest may present physiological disorders such as the honey drop and the internal degeneration caused by pulp senescence. The content of TSS was defi ned more by the genotype of the cultivar, but for some cultivars it varied between years. The cvs. Housui and Kousui tend to contain higher °Brix than cv. Nijisseiki. Best commercial quality of fruits was observed in cv. Housui. The number of seeds per fruit varied between cultivars and years. The cv. Housui showed low fecundity when analyzed by the average number of seeds produced per fruit (<3.0); the cv. Kousui showed low fecundity in São Joaquim, but intermediate fecundity (3.1 to 5.0 seeds per fruit) in Caçador, the cv. Suisei showed intermediate fecundity, and cv. Nijisseiki showed high fecundity (> 5.1 seeds per fruit).

Evolution and perspective of the temperate fruit crops in São Paulo state, Brazil

“…It is also worth mentioning the technological advances with the use of plant regulators, with emphasis to the experiments using ethephon with the aim of improving the emission of new buds (Fracaro & Pereira, 2004) and increase the Niagara Rosada cultivar productivity (Fracaro et al, 2004). Note worthy is that the 'Niagara Rosada' cultivar grown in the region presents an uneven bud burst and the development of after pruning sprouts, mainly when pruning is carried out from May to June, under temperatures below 10 o C. The application of giberelic acid and thidiazuron to increase bunches and berries size of 'Niagara Rosada' cultivar is also a practice widely use by growers.…”

Optimal conditions for conidial germination and infection of European pear leaves by Diplocarpon mespili

“…Pear (Pyrus communis L.) crops are often grown in temperate climatic zones but are not yet fully acclimated to southern Brazil (Faoro and Orth 2010). Brazilian annual pear production in 2013/14 was approximately 22,000 t (IBGE 2015).…”

<b>Dormancy of 'Imperial Gala' apple and 'Hosui' pear tree buds in a region of low chill occurrence

“…Cultivars of Gala apple group are the most important varieties in Brazil and represented 60% of total apple produced (PETRI et al, 2011). Hosui pear is one of the most cultivated in Brazil and has shown an increase in planting area (FAORO;ORTH, 2010).…”