Articles
RECENT RESEARCH FINDINGS ON PINEAPPLE GROWING IN PUERTO RICO AND THE CARIBBEAN ISLANDS, 1970–75
Article number
57_29
Pages
241 – 246
Language
Abstract
Although pineapple is an economic crop in many of the Caribbean Islands, research work is done primarily in Cuba, Martinique, and Puerto Rico.
In the past five years research efforts have been devoted mainly to varieties, density of planting, control of flowering, fertilizers, and insect and disease control.
Two new Puerto Rican varieties, PR 1–57 and PR 1–67, are high yielders (68–94 t/ha) with good shipping qualities.
Increased yields have been obtained from increasing the number of plants/ha with rates up to 41 600 plants/ha in Cuba and 43 000 in Puerto Rico for Red Spanish without significant effect on weight/fruit.
Ethylene gas and Ethrel have given good control of flowering, but work in Martinique and Puerto Rico show that the high N level in the plant can reduce the efficiency of these flower-inducing materials.
Fertilizer studies in Martinique and Puerto Rico have shown the value of foliar diagnosis for controlling the NPK Ca Mg levels in the plant.
In Puerto Rico recent research developments have indicated that: economic weed control is possible with only one pre-emerge herbicide application, systemic nematocides improved the control of nematodes, new insecticides controlled gummosis, and Benlate controlled certain fungus diseases.
In the past five years research efforts have been devoted mainly to varieties, density of planting, control of flowering, fertilizers, and insect and disease control.
Two new Puerto Rican varieties, PR 1–57 and PR 1–67, are high yielders (68–94 t/ha) with good shipping qualities.
Increased yields have been obtained from increasing the number of plants/ha with rates up to 41 600 plants/ha in Cuba and 43 000 in Puerto Rico for Red Spanish without significant effect on weight/fruit.
Ethylene gas and Ethrel have given good control of flowering, but work in Martinique and Puerto Rico show that the high N level in the plant can reduce the efficiency of these flower-inducing materials.
Fertilizer studies in Martinique and Puerto Rico have shown the value of foliar diagnosis for controlling the NPK Ca Mg levels in the plant.
In Puerto Rico recent research developments have indicated that: economic weed control is possible with only one pre-emerge herbicide application, systemic nematocides improved the control of nematodes, new insecticides controlled gummosis, and Benlate controlled certain fungus diseases.
Authors
G. Samuels, E. González-Tejera
Keywords
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