Effects of Biopesticide Bacilius Subtilis Qst 713 and Azotobacter Chroococum +Azotobacter Vinelandii Applications on The Table Grape Quality During The Storage Period

Authors : Zeki KARA, Ferhan KÜÇÜKBASMACI SABIR, Ali SABIR, Ece GÜNAL, Kevser YAZAR

Pages : 8-17

View : 44 | Download : 29

Publication Date : 2016-06-25

Article Type : Research Paper

Abstract :Gray mold, the most important postharvest disease of table grapes, iscon-trolled by SO2. But, SO2 treatment might be dangerous to people. Thus, this study was conducted to prevent quality loss during storage period of table cv. \`Ekşi Kara\` by pre-harvest insert ignore into journalissuearticles values(24 hours prior to harvest); Bacillus subtilis insert ignore into journalissuearticles values(Bs);, and Azotobacter chroococum + Azotobacter vinelandii insert ignore into journalissuearticles values(Ac + Av); in Bs 15 ml L-1, Bs 30 ml L-1, Ac + Av 10 ml L-1, Ac + Av 20 ml L-1 in the pro-ducer vineyard. The clusters were transported to storage room insert ignore into journalissuearticles values(0±1 °C, 85% RH); and put into 500 g paskes. SO2 pad generator and untreated samples utilized as controls. Weight loss insert ignore into journalissuearticles values(WL);, berry and rachis color L, C, h° val-ues, °Brix insert ignore into journalissuearticles values(%);, pH, titratable acidity insert ignore into journalissuearticles values(TA); in must, maturity index insert ignore into journalissuearticles values(MI);, berry cracking resistance [insert ignore into journalissuearticles values(CR); insert ignore into journalissuearticles values(kg);], tensile strength insert ignore into journalissuearticles values(TS);, appearance insert ignore into journalissuearticles values(0-4 scale);, taste insert ignore into journalissuearticles values(0-4 scale);, rachis browning [insert ignore into journalissuearticles values(RB); insert ignore into journalissuearticles values(0-4 scale);], decay rate [insert ignore into journalissuearticles values(DR); insert ignore into journalissuearticles values(%);] were analyzed. WL at the 75th days of storage period by Bs 15 ml L-1, Bs 30 ml L-1 and Control were 2.63%, 2.63%, 3.93% respectively. Least WL was detected at SO2 3.28% at 105th days of storage. Bs 15 ml L-1, Bs 30 ml L-1, Ac+Av 10 ml L-1, Ac+Av 20 ml L-1, and SO2 applications were found effective on certain quality criteria. Bs 15 ml L-1, stands out in terms of prevention of berry C value, °Brix, RB, TS, CR, taste and appearance; Bs 30 ml L-1, berry C value, °Brix, taste, appearance, pH, MI and DR, and Ac+Av 10 ml L-1, WL, RB, and Ac+Av 20 ml L-1, WL, °Brix, pH, appear-ance, RB values. SO2, WL, pH and appearance, TA and DR. Bs and Ac + Av may be an alternative to SO2 especially for the short-term table grape preservation. Bs 30 ml L-1 and Bs 15 ml L-1 for 2 months or longer table grapes storage to be an alternative to SO2 application together in the quality retention as well as residues problem.
Keywords : Sofralık üzüm, Biopestisit, Hasat sonrası, Kalitenin korunması

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