Selection of seedlings in Pre Nursery Oil Palm Nursery and Pest Control

 A.     Selection in Pre Nursery

       Seed selection is important because it will determine the yield and quality of oil palm. To obtain a high-yielding plant, the selected seeds should preferably come from crosses of high-yielding varieties. In Indonesia, more plant material is used from the crossing of Dura and Pisifera. The result of the cross is considered the best cross economically, that is, it is based on the criteria of oil production per hectare, oil quality, vegetative growth, and resistance to diseases.

     The selection is first done when planting sprouts into hyplug or baby polybag. The seed structure consists of plumule and radicle. When seeds are accepted into nursery seeds are selected and discard abnormal seeds such as radicles and/or decaying plumules, there is fungal growth as well as damage and abnormal seed shape. Damage can occur when shipping, for example, there are parts not covered with sawdust, causing dryness. If a case of doubletons or tripletons is obtained, it is best maintained by breaking. SOPs for planting seedlings should be planted the day after the seedlings arrive.

    After the seeds are selected, they are carefully planted about 2 cm below the soil surface and slightly compact the soil around the seeds. Avoid planting too deep and the positioning should be appropriate where the plumule is facing up and the radicle is up. Standard culling seeds 5%. After a month of planting, culling and census of dead and dwarf trees are expected to not be able to catch up uniformly. Selection is carried out to obtain high-yielding seedlings and according to the desired criteria. At the pre-nursery stage, selection is carried out at the age of 3 months from planting seeds or already two leaves and discarding those that do not meet the criteria such as collante, wrinkled leaves, rolled leaves, leaves such as grass, chimeras, twisted shoots, and seedlings affected by disease. as well as the final selection of Pre Nursery before being transferred to the Main Nursery. The culling standard in Pre nursery is a maximum of 15%.

B.     Care in Pre Nursery

1. Consolidation, that is, the addition of soil or compaction to cover the seed roots that appear due to        water or due to lack of soil when filling hyplugs.
2. Eliminate puddles on the surface of the media by piercing the soil so that the water is absorbed. This     is a side effect of watering the top soil is saturated, so it is necessary to take this action.
3. Manual weeding, pulling grass on the growing medium because if left unchecked it can interfere with     seed growth.
4. Spraying, spraying can be done after the seeds are 1 month old. In Pre Nursery the ingredients used        are Bayfolan for foliar fertilizer and Rotraz (active ingredient amitraz) as a fungicide.
5. Fertilization, agroblend fertilization in Pre Nursery is carried out at least a day before sprouts are            planted. This fertilizer is slow release so it is expected to be sufficient during Pre Nursery.

C.     Pests and Their Control

·      Insect
1. Red mite (Ologonychus), small 0.5 mm in size and lives along the bones of the leaf children while        sucking leaf fluid. The attacked part is the leaf. Usually found on the lower leaf surface.
2. Locusts, grasshoppers eat leaves so that seed growth is less than optimal
3. Ants, ants attack the roots of the seed so that it can suffer damage until the death of the seed.
4. Adoretus apogonia beetle, causing holes to be concentrated along the periphery of the leaf
        Insect control uses the active ingredient cypermethrin, examples of trademarks megacyper and cyperin. The mixture is 2 cc/Lair or depending on the attack.

·      Fungi
   Examples of fungi that cause disease on leaves are Culvularia, Botryodiplodia theobrome, melanconium sp and others. The control in the nursery uses the active ingredient Amitraz under the trademark Rotraz. The solution mixture is 2 cc / Lair.


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