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How to recognize and combat fall armyworm in spinach and similar pests
Fall Armyworm
Insect
Type:
Risk to the plant:
CRITICAL
Spodoptera Frugiperda
Pathogen:
Orugas o gusanos
WHO CAUSES IT?
Spodoptera frugiperda, commonly known as the fall armyworm, is a pest that seriously affects various crops, including spinach and other similar crops. The cycle of this insect begins when adult females deposit large quantities of eggs, generally on the underside of leaves. The eggs hatch within a few days, giving rise to larvae that go through up to six stages of growth before reaching the pupal phase. In the first stages, the larvae are small and feed on the superficial tissues of the leaves, but as they progress, they become more aggressive and voracious, devouring the buds of the plants and affecting their development. The larval phase is the most destructive, since it is at this stage when the larvae feed on the most tender parts of the plant. Finally, the larva buries itself in the soil, where it transforms into a pupa, and after a period of pupation, it emerges as an adult moth to restart the cycle.
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SYMPTOMS
The bollworm in spinach causes considerable damage due to the direct destruction of the leaves and the head, which drastically reduces the growth capacity and quality of the crop. As the larvae consume the leaves, they leave irregular holes and, in more advanced stages, the plants may appear completely defoliated. The largest larvae are able to penetrate the center of the plant, which affects the head, the most valuable part of the spinach, thus reducing its commercial value.
- Irregular holes in the leaves
- Damage to the bud
- Total defoliation in severe cases
- Weakened plants and reduced growth
- Appearance of larval excrement on the leaves
DEVELOPMENT CONDITIONS
Temperature:
20°C - 30°C
Humidity:
70% - 90%
HOW IS IT SPREAD?
Wind, migration of adults, contaminated planting materials, infested soil, contaminated agricultural machinery, spread from nearby infested plants
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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