Onion Fertilization Point

⇒ Since there is risk of seed stalk development if nitrogen is insufficient, nitrogen fertilizer must be maintained even after March.

⇒ Phosphoric acid is an important element for the seedling to take root, uprooting and cold resistance.

⇒ Potassium affects bulb enlargement and storage, and it must not be insufficient.

⇒ Demand for calcium is very high in Liliaceae plants. Deficiency can lead to blight and storage which can be fatal for the commercial value.

⇒ Sulfur raises the inherent taste and aroma, and disease tolerance of onion.

 

Basal application of fertilizer – Excessive fertilization of poorly decomposed compost or organic fertilizer is the main cause of nutrient imbalance and salt accumulation.

Gas stress caused by premature organic matter is fatal to crops.

Manage to ensure consistent supply of fertilizer.

⇒ Soil application with CERES (4-2-1+70% organic matter) 1000KG/1ha

⇒ Soil application with ONE PRO 952 900KG/1ha 

⇒ Soil application with NUTRI POWER 100KG/1ha

 

Additional Fertilizer – Balanced nutrient management is needed so that nitrogen does not become excessive.

A stable supply of calcium is absolutely necessary for quality control.

Maintaining the vitality of the roots is key to long-term cultivation.

Must start quickly after defrosting and nitrogen fertilization must be completed by the end of March for the medium-late maturing variety as well.

⇒ For the plant to take root after planting – Irrigation with THE ROOTS 20L/1ha

⇒ 1st additional fertilizer, around mid-February - Soil application with NK CALMA 300KG/1ha.

⇒ 2nd additional fertilizer, around mid-March - Soil application with NK CALMA 300KG/1ha.

⇒ 3rd additional fertilizer, around mid-April - Irrigation with TOP PLANT PKCAB 50KG/19.8a

 

Physiological Disorders and Problems that Occur During Onion Cultivation

 

1. Frost damage prevention and recovery – Occurs because the root could not extend sufficiently

⇒ Irrigation with THE ROOTS 20L/1ha after planting

⇒ Foliar spraying with LUK S 1000x for damage recovery

 

2. Division and seed stalk development phenomenon prevention – Mainly occurs if growth is excessive due to high temperature during the wintering period

⇒ Since growth is robust, additional fertilizer must be fertilized aggressively.

⇒ Irrigation with TOP PLANT 28-10-10 30KG/1ha if fertilizer is insufficient.

 

3. Cracking head phenomenon prevention – Sufficient cell division and provision of calcium is needed

⇒ Foliar spraying with BIG HEALTH 1000x when 5~6 leaves come out

⇒ Foliar spraying with POLY CAB 1000x when the onion bulb starts to form

 

4. Bulb enlargement

⇒ Foliar spraying with BIG HEALTH 1000x when 5~6 leaves come out

⇒ Foliar spraying with BULB UP 1000x after wintering when growth and development become robust

⇒ Foliar spraying with BIG BULB 1000x from 2 weeks before onion lodging - Overground nutrient is moved underground.

 

5. Promotes ripening, improves storage, and improves mouthfeel – Nitrogen must be reduced and supplied amount of potassium must be increased. Fertilize with calcium during the enlargement period.

⇒ Foliar spraying with DOUBLE PK 250x + irrigation with CALSTAR GOLD 30L/1ha.

 

6. Leaf is thin and new leaf is not coming out – Phosphoric acid is insufficient

⇒ Foliar spraying with FLAMINGO 1000x

 

7. Leaf is small and lower leaf is browning – Nitrogen is insufficient

⇒ Foliar spraying with DOUBLE N 250x

 

8. New leaf is browning, withering and growth has stopped – Micronutrients and calcium are insufficient

⇒ Foliar spraying with COMBI Ⅲ 1000x

 

9. Leaf is bent and has no strength – Magnesium deficient

⇒ Foliar spraying with COMBI Ⅱ 1000x

 

10. Shoot browning and weak shoot growth and development – Iron and boron deficiency

⇒ Foliar spraying with COMBI Ⅰ 2000x

 

11. Prevent and solve dry damage due to drought

⇒ Foliar spraying with DSD-1 1000x

 

12. Damping off, Downy mildew prevention and treatment - If overgrowth occurs due to excessive nitrogen, risk of disease increases

⇒ Foliar spraying with SSR ALL or MOLD OUT 1000x + CAP2018 500x

 

13. Purple blotch prevention and treatment- If anaphase growth and development is insufficient, risk of disease increases

⇒ Foliar spraying with SSR ALL or MOLD OUT 1000x + LUK S 500x

 

14. Leaf blight prevention and treatment – Manage so that plant vigor is strong

⇒ Foliar spraying with SSR ALL or MOLD OUT 1000x + SEAWEED F 500x

 

15. Rust prevention and treatment – Manage so that manurial deficiency does not occur and be

especially careful about calcium deficiency

⇒ Foliar spraying with SSR ALL or MOLD OUT 1000x + POLY CAB 1000x

 

16. White rot, soft rot prevention and treatment – Infectious disease of the soil in repeated cultivation fields

 ⇒ Irrigation spraying with SSR SOIL 15L/1ha

 

17. Various blight prevention and enhancement of pesticide effect

⇒ Foliar spraying with GLOSTAR 1000x + applicable pesticide

 

18. Onion maggot and heterorhabditis sp – Thrives for most Liliaceae

⇒ Irrigation spraying with SSR -I (1) 10L/1ha and soil application with KILL KING 45KG/1ha