Effect of Paclobutrazol with Ethephon on Flowering and Leaf Flushing of Lychee Cv. Hong Huay
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In November-December, 1989, single spray of paclobutrazol followed by two sequential sprays of ethephon at the concentration of 500:(300: 300), 750:(400: 400) and 1,000:(500: 500) ppm. were applied on the half tree plot of the 8 years old lychee cv. Hong Huay, compared to the check on the other half and the untreated control trees which were not sprayed. The experiment was performed in the orchard at Mae Tang District, Chiang Mai, Thailand. It was found that, all treatments did not affect percentage of flowering and leaf flushing, while there was no different and no correlation between sprayside and non sprayside on the same lychee tree. In the meantime from October-November 1989, single spray of paclobutrazol followed by single sprays of ethephon at the concentration of 500:(300), 750:(400) and 1,000:(500) ppm. were applied on whole tree plot of the 6 years old lychee cv. Hong Huay, compared to the untreated control. The experiment was performed in the orchard at San Kum Pang District Chiang Mai, Thailand. It was found that, paclobutrazol: (ethephon) 1,000:(500) ppm. reduced the percentage of leaf flushing about 10 percents compared to the untreated control, while all chemical treatments did not affect the percentage of flowering.
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References
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