Control of post harvest diseases of grape fruits using some safety tretments

Abstract EN

The major post-harvest pathogens on grape fruits export are Botrytis cinerea, Aspergillus niger and Alternria alternata Thompson and Flame cultivars were treated with Cyprodinil and Iprodione fungicides Also, it could be suggested that acetic acid and ethanol vapors could be safety for controlling storage natural infection and artificially inoculation of B.

cinerea, A.

niger and A.

alternata during cold storage period, 45 days at 0°C.

Ethanol vapor s and acetic acid fumigation cone.

8 % indicate that the highest reduction of colony diameter 100% in the three pathogens Also, the fungicide treatments Cyprodinil and Iprodione concentration at 200 ppm (94.44-90 %) with A.

alternata, (88.88 -83 %) with A.

niger and (94.44 -85 %) with B.

cinerea .General, in vitro ethanol vapors and acetic acid fumigation higher effective, reduction in colony diameter than Cyprodinil and Iprodione compared with the control.

Cyprodinil (0.75 g / 1) and Iprodion (0.66g / l), significantly suppressed the decay development on naturally infected grape fruits Thompson and Flame cultivars as well as the artificially inoculated fruits after cold storage 0°C for 45 days during seasons 2007 and 2008 compared with the control.

All tested treatments provided efficiency to control post-harvest diseases of grapes, which simulate transit and marking grape for exportation.

Bunches quality was enhanced by increasing total soluble solids Residues of the fungicides Cyprodinil and Iprodione were determined through gas chromatographic analysis in the two cultivars Thompson and Flame.

Iprodione and Cyprodinil residues were reduced by increasing the storage periods from (35 -3.2 Mg/kg) and (2.9-24.6 Mg / kg) zero time to (not detected) after 21 days after treatment of Thompson and Flame respectively.

Pre-harvest interval Cyprodinil 8 days and Iprodione 7 days.