Susceptibility of sweet cherry cultivars to rain induced fruit cracking

Abstract

Susceptibility of 17 sweet cherry cultivars to rain induced fruit cracking was studied in the Belgrade region during a three-year period (2008-2010). Testing of fruit cracking was done using cracking index by Christensen. In the cultivars tested were found significant differences in cracking index, fruit weight and soluble solids content. The highest susceptibility to rain induced fruit cracking showed cultivars 'Bigarreau Jaboulay', 'Primavera', 'Bing' and 'Merchant', while the least sensitive cultivars were 'Sue' and 'Čarna'. Based on the cracking index, cherry cultivars were classified into four groups: low susceptible ( lt 10), moderately susceptible (10-30), susceptible (30-50) and highly susceptible (> 50). Most cultivars (11) were susceptible and highly susceptible to fruit cracking. Correlations between cracking index, fruit weight, and soluble solids contents were low among different varieties, but very strong among different harvest terms. .

U periodu od tri godine kod 17 sorti trešnje proučavana je osetljivost prema pucanju ploda, koja je određivana na osnovu indeksa pucanja. Između ispitivanih sorti utvrđene su značajne razlike u pogledu mase ploda, sadržaja rastvorljive suve materije i indeksa pucanja ploda. Razlike su takođe utvrđene i između godina ispitivanja, kao i termina berbe. Najveću osetljivost prema pucanju ploda pokazale su sorte Lionska rana, Primavera, Bing i Merčant, dok su najmanje osetljive bile sorte Sju i Čarna. Korelacije između indeksa pucanja, mase ploda i sadržaja suve materije su bile slabe između sorti, ali vrlo jake između termina berbe.