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How to recognize and combat fusarium wilt or corn lodging
Fusarium Wilt Or Corn Return
Fungus
Type:
Risk to the plant:
HIGH
Fusarium Spp.
Pathogen:
Fusariosis
WHO CAUSES IT?
Fusarium spp. It is a genus of filamentous fungi that includes several species pathogenic to corn, causing the disease known as fusarium wilt. These fungi are found in soil and plant residues, where they produce survival structures such as chlamydospores, which can persist for long periods in adverse conditions. When environmental conditions are favorable, chlamydospores germinate and produce mycelium, which can invade plant roots. Fusarium spp. It spreads through the plant's vascular system, blocking the flow of water and nutrients and producing toxins that contribute to wilting. During the crop cycle, the pathogen produces asexual spores called conidia, which are dispersed by wind, water and agricultural tools, facilitating the infection of new plants. At the end of the growing season, the fungus re-forms resistant structures to survive until the next season.
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SYMPTOMS
Fusarium wilt in corn is characterized by a set of symptoms that affect both the roots and the aerial parts of the plant. The infection usually starts in the roots, spreading rapidly through the vascular system and causing a decrease in the growth and development of corn. The most common symptoms include:
- Withering of leaves
- Vascular discoloration of roots and stem
- Root necrosis
- Delayed plant growth
- Chlorosis and yellowing of the lower leaves
- General collapse of the plant in advanced stages of infection
DEVELOPMENT CONDITIONS
Temperature:
20°C - 30°C
Humidity:
70% - 90%
HOW IS IT SPREAD?
Contaminated soil, infected crop residues, contaminated seeds, agricultural tools, irrigation water
HOW TO ELIMINATE IT?
Home treatments
There are no home treatments
Natural allies
Chemical treatments
There are no treatments for this disease. Treatments are directed at the insect vectors that transmit it. See insect treatments.
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