Articles
DEFOLIATION AND VEGETATIVE REGROWTH OF PSIDIUM GUAJAVA WITH ETHEPHON AND GIBBERELLIC ACID
Article number
201_14
Pages
145 – 148
Language
Abstract
Effects of ethephon, gibberellic acid (GA3), and stem maturity on defoliation and shoot regrowth in guava (Psidiumguajava L. ‘Beaumont’) was investigated.
A factorial experiment with 4 levels of ethephon, 3 levels of GA3, and 2 stem maturity was conducted on potted guava plants.
Ethephon, GA3, and stem maturity had significant effects on percent defoliation.
Increasing ethephon concentration increased percent defoliation from 26 to 94%. GA3 had 79% defoliation compared to 64% without GA3. Semi-hardwood stem had 80% defoliation, whereas softwood stem had 69% defoliation.
There was a significant interaction between ethephon concentration and stem maturity on the number of new lateral shoots (> 1 cm) per initial leaf count.
Mean shoot lenght was greatest (10.1 cm) at 600 ppm ethephon.
A factorial experiment with 4 levels of ethephon, 3 levels of GA3, and 2 stem maturity was conducted on potted guava plants.
Ethephon, GA3, and stem maturity had significant effects on percent defoliation.
Increasing ethephon concentration increased percent defoliation from 26 to 94%. GA3 had 79% defoliation compared to 64% without GA3. Semi-hardwood stem had 80% defoliation, whereas softwood stem had 69% defoliation.
There was a significant interaction between ethephon concentration and stem maturity on the number of new lateral shoots (> 1 cm) per initial leaf count.
Mean shoot lenght was greatest (10.1 cm) at 600 ppm ethephon.
Authors
Kent D. Kobayashi
Keywords
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