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The postharvest development of peteca rind pitting in `Meyer' lemons [Citrus meyeri (Y.) Tan] was aggravated by citrus wax application and fruit brushing. Increasing brushing time increased the incidence of the disorder. Polyethylene-based waxes induced more peteca than carnauba-based wax formulations. Ethylene degreening and/or storage before waxing decreased fruit susceptibility, while application of the fungicide guazatine did not increase peteca incidence. Storage between 10 and 25C had no effect on injury levels. Chemical name used: bis(8-guanidino-octyl) amine (guazatine).
Abstract
Postharvest treatment of ‘Valencia’ oranges [Citrus sinensis (L.) Osbeck] with hot dips of water or water suspensions of benomyl (500 mg liter-1) or thiabendazole (TBZ) (1000 mg liter-1) greatly reduced chilling injury (CI) incidence when fruit were stored for 15 weeks at 1°C. The hot TBZ dip treatment was significantly better than the other hot dip treatments for reducing CI. Pretreatment rind injury inflicted to the fruit before cold storage slightly increased CI incidence. Chemical names used: methyl 1-(butylcarbamoyl)-2-benzimidazole-carbamate (benomyl); 2-(4-thiazoIyl)-benzimidazole (thiabendazole).
Abstract
Lemons (Citrus limon (L.) Burm. f.) were stored for up to 27 weeks at 10°C in air and in an atmosphere of 3 to 5% O2 and 0.1 to 0.2% CO2, with and without an ethylene absorbent. Mold incidence was high in controlled atmosphere (CA) storage where ethylene accumulated, but removal of ethylene reduced its development. CA storage improved retention of green color in lemons.
Cranberries (Vaccinium macrocarpon Ait.) require low rates of N fertilizer compared to many horticultural and agronomic crops. Excess N promotes vegetative growth at the expense of yield. Growers desire information about N fertilization to achieve optimum yields without overgrowth, Little information has been published about N rate and timing influence on cranberries in south coastal Oregon. An N rate and timing field experiment with Crowley and Stevens cultivars was established to answer grower questions. N was applied at 0, 18, 36 and 54 kg/ha in various combinations at popcorn (white bud), hook, fruitset, early bud, and late bud. Yield, yield components, (fruit set, number of flowering and total uprights, berry size, flowers per upright and the proportion of uprights that flower), vegetative growth and anthocyanin content were measured. After 2 years of treatments, N rate or timing had little influence on yield or yield components in the previously heavily fertilized Crowley bed. In the previously lightly fertilized Stevens bed, N rate increased yield, vine growth, and the number of flowering uprights, N timing also influenced the number of flowering uprights. The total number of uprights was influenced by the interaction of N rate and timing.