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Quality of ‘Bartlett’ Pears Thinned Chemically and by Hand


In British Columbia, ‘Bartlett’ pears are thinned with naphthaleneacetamide (NAAm) applied by gun application at 10 μg-liter (w/v) or with air-blast sprayers at 44 g a.i.ha-1, between 13 and 21 days after full bloom. Concern has been expressed by packinghouse personnel about the storage quality of these pears. Higher incidences of breakdown have been suggested, and no controlled experiments have been reported to substantiate or refute such claims. Therefore, a study was conducted during 1980-1983 to assess several quality parameters of ‘Bartlett’ pears thinned by hand and with NAAm.