Articles
RATES OF FRUITONE CPA IN DIFFERENT APPLICATIONS NUMBER DURING DAY VERSUS NIGHT TO FLOWERING INHIBITION IN PINEAPPLE.
Article number
529_22
Pages
185 – 190
Language
Abstract
One of the most important problems in pineapple production in Mexico is the natural flowering that causes excess of the fruit in June and July and scarcity in August and September.
The objective of this study was to inhibit the flowering using 2-(3-chlorophenoxy) propionic acid (Fruitone CPA) during the peak flowering time.
Four experiments were carried out in Isla, Veracruz State during 1995–96 with two planting densities and two kind of plant size, as follow: 1) 40,000 plants per hectare and 2 kg per plant; 2) 40,000 plants per hectare and 1.2 kg; 3) 24,000 plants per hectare and 1.2 kg; and 4) 24,000 and 1.2 kg.
The experimental design used was a randomised complete block in split plot with four replicates; the main plots were rates of chemical application that are: 30 mg L-1, 60 mg L-1, 90 mg L-1 and 120mg L-1 with one, two, three and four applications of 30 mg L-1, respectively.
The sub plots were times of application e.g. 9.00, 14.00 and 4.00 h.
The treatments began in October, at the same day for all the experiments, but with different planting date.
The chemical was applied every 15 days at the volume of 50 ml per plant.
There was no significant effect (p≤0.05) among the treatments of hours of application for all experiments.
Regarding to the rates, there was a highly significant (p≤0.05) among the experiment; the best rate was 90 mg L-1 for the experiments 1, 3 and 4 with 78, 87 and 99% of flowering inhibition, respectively, while the experiment 2 gave 77% inhibition with 120 mg L-1. The control had more than 90% of natural flowering.
It is concluded that chemical can be applied either night or day on any planting density and 90 mg L-1 split in three applications gave the best inhibition.
The objective of this study was to inhibit the flowering using 2-(3-chlorophenoxy) propionic acid (Fruitone CPA) during the peak flowering time.
Four experiments were carried out in Isla, Veracruz State during 1995–96 with two planting densities and two kind of plant size, as follow: 1) 40,000 plants per hectare and 2 kg per plant; 2) 40,000 plants per hectare and 1.2 kg; 3) 24,000 plants per hectare and 1.2 kg; and 4) 24,000 and 1.2 kg.
The experimental design used was a randomised complete block in split plot with four replicates; the main plots were rates of chemical application that are: 30 mg L-1, 60 mg L-1, 90 mg L-1 and 120mg L-1 with one, two, three and four applications of 30 mg L-1, respectively.
The sub plots were times of application e.g. 9.00, 14.00 and 4.00 h.
The treatments began in October, at the same day for all the experiments, but with different planting date.
The chemical was applied every 15 days at the volume of 50 ml per plant.
There was no significant effect (p≤0.05) among the treatments of hours of application for all experiments.
Regarding to the rates, there was a highly significant (p≤0.05) among the experiment; the best rate was 90 mg L-1 for the experiments 1, 3 and 4 with 78, 87 and 99% of flowering inhibition, respectively, while the experiment 2 gave 77% inhibition with 120 mg L-1. The control had more than 90% of natural flowering.
It is concluded that chemical can be applied either night or day on any planting density and 90 mg L-1 split in three applications gave the best inhibition.
Publication
Authors
M.A. Rebolledo, D.E.A. Uriza, M.L. Rebolledo
Keywords
Ananas comosus, flowering inhibition, Fruitone CPA
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