7Looney N E, McKellar J E. Thinning Spartan apple with carbaryl and 1-naphthaleneacetic acid: Influence of spray volume and combinations of chemicals. Can. J. Plant sci., 1984, 64:161 ～ 166.
8Williams Max W. Comparison of NAA and carbaryl petal-fall sprays on fruit set of apples. HortTechnology, 1993, 3:428-429.
9Yokota K, Mumshita K. Flower thinning effect of synthetic auxins on Fuji apple. Acta Horticulturae, 1995, 394:105 ～ 112.
10Luckwill L C. Studies of fnfit development in relation to plant hormones. Ⅱ. The effect of naphthalene acetic acid on fruit set and fruit development in apples. J. holt. Sci., 1953, 28:25-40.
