How to Treat Wilting Disease on Onion?

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English

English

繁體中文

日本語

Español

Français

Deutsch

Pусский

Português

Italiano

한국어

Nederlands

العربية

Svenska

Polskie

ภาษาไทย

Bahasa Melayu

Bahasa Indonesia

Symptom Analysis

Onion exhibits yellowing and curling of leaves, stunted growth, drooping foliage, dryness, and final browning of the entire plant. The bulbs may show signs of rot and damage.

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What Causes Wilting Disease on Onion?

Fungal Pathogens

Fusarium oxysporum f.sp. cepae and Verticillium dahliae are common fungi causing wilting.

Abiotic Stress Factors

Inadequate water, improper soil pH, or high temperature could also trigger the wilting response.

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How to Treat Wilting Disease on Onion?

Non pesticide

Crop rotation: Rotating Onion with non-host crops help reduce the fungal population in the soil.

Proper watering: Avoid overwatering, which promotes fungal growth, and under-watering, which triggers wilting.

Pesticide

Fungicide application: Applying systemic fungicides like Myclobutanil can help control the disease.

How to Prevent Wilting on Onion?

Sanitation

Maintain cleanliness in the fields and sanitize equipment to avoid fungus spread.

Healthy planting

Plant disease-free seeds in well-drained soil optimised with the correct PH.

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When is Wilting Most Active Period on Onion?

Wilting is most active in warm and wet seasons, due to conducive conditions for fungal growth and the spread of their spores.

Infectivity

Moderately

Wilting spreads from plant to plant, though not as rapidly as certain other plant diseases.

Lethality

Highly

If not managed timely, wilting can kill the entire Onion plant, resulting in total crop loss.

FAQs on Onion

What is the first sign of wilting in Onion?

The first visible sign of wilting is usually yellowing and curling of leaves for Onion.

How does wilting affect the yield in Onion?

Wilting can cause significant yield losses in Onion as the bulbs may rot, and the entire plant may eventually die.

Can we consume a Onion affected by wilting disease?

It's not recommended. Some fungal pathogens causing wilting can produce toxins hazardous to human health.

Is wilting in Onion contagious?

Yes, wilting can spread from one plant to another, especially under favourable conditions for the fungi.

What conditions favour the occurrence of wilting in Onion?

Conditions that favour wilting include warm and wet climatic conditions and poorly drained or overwatered soils.

Can wilting in Onion be cured?

Yes, wilting in Onion can be managed effectively through timely application of appropriate fungicides, proper watering, and crop rotation practices.

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Other Common Problems About Onion

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Brown blotch yellow edge

Brown spot is a fungal disease that attacks Onion, leading to browning of its leaves and potentially devastating crop yield. It's caused by pathogen Bipolaris spp. It usually occurs during warm, wet weather and can be managed via proper cultural practices and treatments.

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Leaf blight is a disease affecting many plant species including Onion. It is caused by widespread fungal pathogens like Alternaria, Botrytis, and Phytophthora, leading to severe declining in plant health and propagation. Rapid progression and high lethality increase the economic significance of this disease.

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Leaf rot, a highly devastating disease, can significantly restrict Onion's growth and productivity. Typically caused by various fungi and bacteria, the disease can result in yellowing and wilting of leaves, ultimately leading to plant death if not properly managed.

Leaf wilting is a common pathological condition in Onion that affects its growth and yield significantly. This disease leads to dehydration in plant tissues, causing the leaves to wilt and droop while potentially inhibiting bulb formation, thereby affecting its market value.

Yellow edges disease is a phytopathological condition affecting the Onion. It initiates a significant discoloration of its leaves' edges, primarily impacting the plant's overall health and productivity.

Scars is a perilous disease affecting Onion, majorly causing damage to its skin, leading to its unattractiveness and low market value. The disease invites pests, causing significant yield loss, and severely affecting the growth cycle.

Flower withering

Flower withering affects Onion by causing blossoms to wilt and potentially halting bulb development, leading to yield loss and compromised plant vigor.

Plant dried up is a broad disease affecting Onion, causing dehydration and cell death that leads to wilting and eventual plant death. This disease is most prevalent in drought conditions and can severely impact yield quantity and quality.

Whole leaf withering

Whole leaf withering is a pathological condition affecting Onion whereby the plant suffers extensive leaf dehydration, wilting, and eventual death. It's potentially lethal, causing significant yield reduction if not managed effectively.

Underwatering dry

Underwatering is a water deficiency condition that severely affects the growth and development of Onion, leading to wilted droopy leaves, stunted growth, and reduced yield. It's important to manage the water supply to ensure healthy growth.

Leafminer stripe

Leafminer stripe is a common pest-caused disease affecting Onion primarily during the warmer months. This disease distresses the plant by attacking the leaves, causing misshapen, brown patches and undermining photosynthesis, which leads to stunted growth and loss of crop yield.

Thrips are minute pests that attack Onion, causing discoloration and deformities in the leaves, reducing overall yield and quality of the crop.

Dark blotch is a devastating disease affecting Onion, leading to significant yield loss. It is triggered by the pathogen Alternaria porri and manifests as dark, blotchy areas on foliage and bulbs, eventually leading to rot.

Leaf yellowing' is a disease that significantly affects the health of Onion. It primarily results in a yellow discoloration of leaves, limitations on growth and potentially plant death. Early and precise intervention is critical for preserving Onion's productivity.

Stem rot is a destructive fungal disease affecting Onion, causing considerable yield loss. It is characterized by symptoms such as bulb rot and yellowing of leaves. Stem rot thrives in wet, warm conditions and is spread through infected plant debris. Control measures include cultural practices and the use of fungicides.

Soft Rot is a destructive bacterial disease that predominantly affects Onion, causing tissue decay and significant yield losses. Instigated by the pernicious Pectobacterium carotovorum, it is notorious for its rapidly progressing symptoms and damp, foul-smelling rot condition.

Spots is a common fungal disease affecting Onion. Its high infectiousness leads to stunted growth in the plant and drastically reducing yield. Managing Spots typically involves both cultural practices and chemical treatments for optimal results.

Learn More About the Onion

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