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Abstract
The percentage set of blossoms and number and weight of pods of bush snap beans, Phaseolus vulgaris L. were reduced when plants were subjected to high maximum temperatures during bloom. Yields were reduced 0 to 65% in greenhouse and field tests. Perforated plastic-covered cages in the field produced maximum temperatures of 83 to 101°F while maximum temperatures for checks averaged 74 to 89°. High temperatures decreased carbohydrates in leaves, starch more than sugars, when compared to checks.