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1973•Indian Journal of HorticultureOpen access

Growth Substances and Zinc on Litchi Fruit Drop

M. N. Hoda, N. B. Syamal, V. S. Chhonkar

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Abstract

Zinc sulphate, mixed with hydrated lime, was sprayed on new growth flush. Three sprayings of growth substances—Napthaleinacetic acid (NAA) and 2,4-dichloro-phenoxyacetic acid (2,4-D) were done after fruit set at weekly intervals to check fruit drop in ‘Purbi’ litchi. The results show that both NAA at 10 ppm and 2,4-D at 15 ppm in combination with 1.0 per cent zinc sulphate gave significantly more fruit retention at harvest. 2,4-D at 20 ppm induced injurious effect killing a large number of fruits.

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What this paper is about

Zinc sulphate, mixed with hydrated lime, was sprayed on new growth flush. Three sprayings of growth substances—Napthaleinacetic acid (NAA) and 2,4-dichloro-phenoxyacetic acid (2,4-D) were done after fruit set at weekly intervals to check fruit drop in ‘Purbi’ litchi. The results show that both NAA at 10 ppm and 2,4-D at 15 ppm in combination with 1.0 per cent zinc sulphate gave significantly more fruit retention at harvest. 2,4-D at 20 ppm induced injurious effect killing a large number of fruits.

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Available abstract

Zinc sulphate, mixed with hydrated lime, was sprayed on new growth flush. Three sprayings of growth substances—Napthaleinacetic acid (NAA) and 2,4-dichloro-phenoxyacetic acid (2,4-D) were done after fruit set at weekly intervals to check fruit drop in ‘Purbi’ litchi. The results show that both NAA at 10 ppm and 2,4-D at 15 ppm in combination with 1.0 per cent zinc sulphate gave significantly more fruit retention at harvest. 2,4-D at 20 ppm induced injurious effect killing a large number of fruits.

Key concepts: Lime, Zinc, Horticulture, Fruit set, Drop (telecommunication), Chemistry, Botany, Biology

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