Effects of ozone atmospheres on spoilage of fruits and vegetables after harvest effectsofozoneat801spal Year: 1968 1 6 MARKETING RESEARCH REPORT NO. 801, DEPARTMENT OF AGRICULTURE Table 3.—Percentage of strawberries that developed rkizopus and botrytis rot during storage for 7 days in air or in ozone ( ) at 35° F. and after a subsequent 2-day holding period at 70° without ozone 1 Holding period, Treatment 1 2 Treatment 2 2 Treatment 3 2 temperature, and variety No ozone Ozone No ozone Ozone No ozone Ozone 1 7 days at 35° F. Sel. 2929 Percent 36 45 0 .29 21 Percent 57 35 20 21 1
Effects of ozone atmospheres on spoilage of fruits and vegetables after harvest effectsofozoneat801spal Year: 1968 1 6 MARKETING RESEARCH REPORT NO. 801, DEPARTMENT OF AGRICULTURE Table 3.—Percentage of strawberries that developed rkizopus and botrytis rot during storage for 7 days in air or in ozone ( ) at 35° F. and after a subsequent 2-day holding period at 70° without ozone 1 Holding period, Treatment 1 2 Treatment 2 2 Treatment 3 2 temperature, and variety No ozone Ozone No ozone Ozone No ozone Ozone 1 7 days at 35° F. Sel. 2929 Percent 36 45 0 .29 21 Percent 57 35 20 21 19 Percent 73 49 17 31 41 Percent 73 42 24 25 24 Percent 68 48 22 33 43 Percent 64 s 51 ( 28 39 29 Do Dixieland _ . Sel. 3201 Do Mean 3 . . _ _. _ . 26 a 30 a 42 b 38 b 43 b 43 b'i 7 days at 35° F. + 2 days at 60° F. Dixieland __ _ Sel. 2929 Sel. 3198 Sel. 3201 _. 68 79 79 80 70 52 79 80 69 63 60 91 82 98 86 68 79 89 76 94 62 77 84 84 83 77 79 88 71 71 Do Mean 3_ __ . ______ 75 a 68 a 83 b 81 b 78 ab 77ab 1 Each mean is an average of the percent rot in 10 pint baskets. 2 In treatment 1, a Bolrytis-rotted berry was added to each basket as a nesting center. In treatment 2, a Rhizopus-iotted berry was added. No rotted berry was added in treatment 3. 3 Means for each holding period not followed by the same letter are significantly different at the 5-percent level. BN-29476 Figure 3.—Influence of ozone on the development of nests of Botrytis cinerea in strawberries: A, Strawberries held in air for 3 days at 60° F. and 90 percent relative humidity, showing early stage of fungal nest development in which the mycelia of B. cinerea are spreading to adjacent berries; B, strawberries held under the same condi- tions as A but with ozone added, showing the dead shriveled aerial mycelia of the fungus restricting spread of the fungus to points of contact between healthy and infected tissue.
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