Pineapple Cultivation: Seed Treatment and Spacing

Choosing and Preparing Planting Material (Seed Treatment)

Pineapples are typically propagated using vegetative parts like slips, suckers, or crowns. Selecting healthy, vigorous, and disease-free material is the first step. After selection, prepare them for planting:

• Trimming: Remove any small, dried, or diseased leaves from the base of the slips, suckers, or crowns. For crowns, trim the base to expose the root initials.

• Curing/Drying: Allow the trimmed planting material to air dry in a shaded, well-ventilated area for 2-3 days. This helps the cut surfaces heal and reduces the risk of rot after planting.

• Fungicide Dip: To protect against fungal diseases like heart rot or root rot, dip the base of the planting material in a fungicide solution. A common recommendation is a 0.1% Carbendazim solution or 0.2% Mancozeb solution for 15-20 minutes.

• Insecticide Dip (Optional): If pests like mealybugs or scale insects are a known problem in your area, you can also dip the material in a mild insecticide solution (e.g., 0.05% Chlorpyrifos or 0.03% Imidacloprid) after the fungicide dip, or as a combined treatment if compatible.

• Rooting Hormone (Optional): For faster and stronger root development, some farmers dip the base in a rooting hormone solution.

• Air Drying After Treatment: After dipping, allow the planting material to air dry again in the shade until the solution has dried on the surface before planting.

Recommended Spacing for Pineapple

The spacing of pineapple plants significantly impacts yield, fruit size, and overall plant health. A common practice in India is the double-row system, which allows for higher plant density and better land utilization compared to single-row planting.

SystemRow-to-Row (cm)Plant-to-Plant (cm)Approx. Plants/HectareSingle Row906018,500Double Row (Bed System)90 (furrow to furrow)50-60 (row to row on bed)3040,000 - 50,000High Density (Double Row)60 (furrow to furrow)30 (row to row on bed)3060,000 - 63,000

Factors Influencing Spacing

Several factors should be considered when deciding on the optimal spacing for your pineapple crop:

• Variety: Different pineapple varieties have varying growth habits. For example, the 'Kew' variety, which produces larger fruits, generally requires wider spacing than smaller-fruited varieties like 'Queen'.

• Soil Fertility: Highly fertile soils can support a higher plant density compared to less fertile soils, provided other inputs like water and nutrients are adequately supplied.

• Irrigation Availability: Fields with assured irrigation can sustain higher plant populations, as water stress is less of a concern.

• Desired Fruit Size: Wider spacing generally leads to larger individual fruits, while closer spacing can result in more fruits per hectare but often of a smaller size.

• Climate: In areas with high light intensity, slightly closer spacing can help provide some mutual shading, protecting fruits from sunburn.

Best Practices for Planting

Once your planting material is treated and spacing is determined, proper planting technique is essential:

• Planting Depth: Plant the slips, suckers, or crowns to a depth of about 5-7 cm, ensuring the base of the stem is firmly in the soil. Do not plant too deep, as this can lead to rot.

• Firming the Soil: Gently firm the soil around the base of each plant to ensure good contact with the roots and prevent air pockets.

• Planting Time: Planting is best done at the onset of the monsoon or during periods of assured irrigation to help the plants establish quickly.

By carefully treating your pineapple planting material and adopting an appropriate spacing strategy, you lay a strong foundation for a healthy, productive pineapple farm. These practices are key to achieving good yields and high-quality fruits.