Orugas o gusanos
Fall armyworm, corn earworm: what it is, how it originates, and how to eliminate it effectively.
Fall Armyworm, Corn Bollworm
Spodoptera Frugiperda
Pathogen:
Insect
Type:
Risk to the plant:
HIGH
DESCRIPTION
WHO CAUSES IT?
Spodoptera frugiperda, known as the bollworm or corn bollworm, is a major pest that affects a variety of crops, including cotton. This insect goes through several stages of development: egg, larva, pupa and adult. Adult females deposit their eggs in groups on the surface of the leaves of host plants. Once they hatch, the larvae emerge and feed on the leaves and tender shoots of the plants. During their larval stage, they can cause serious damage to crops, as they are voracious devourers of foliage. After several molts, the larvae enter the pupal stage, where they transform into flying adults. These adults reproduce and the life cycle continues.
SYMPTOMS
In cotton, infestation by Spodoptera frugiperda causes the disease known as bollworm. General symptoms include:
• Damage to the leaves, which become torn and perforated.
• Damage to tender shoots and flower buds, which may result in loss of yield.
• Presence of larval excrement, which may be visible on the leaves.
TEMPERATURE AND HUMIDITY
20ºC - 32ºC
70% - 90%
HOW IS IT SPREAD?
Wind, movement of larvae or pupae on agricultural equipment, migration of adults.
HOW TO REMOVE IT?
Home remedies
There are no home treatments
Chemical treatments
• CYPERMETHRIN 5% [EC] P/V
• CYPERMETHRIN 0.8% [MG] P/P
• DELTAMETHRIN 1.57% [SC] P/V
• DELTAMETHRIN 10% [EC] P/V
• DELTAMETHRIN 2.5% [EC] P/V
• LAMBDA CYHALOTHRIN 0.15% [GR] P/P
• LAMBDA CYHALOTHRIN 0.24% [GR] P/P
• LAMBDA CYHALOTHRIN 0.4% [GR] P/P
• LAMBDA CYHALOTHRIN 10% [CS] P/V
• TEFLUTRIN 0.5% [GR] P/P
• Spodoptera frugiperda (Pheromones) (Attractant pheromones of Lepidoptera)
Authorized treatments in organic farming
• LAMBDA CYHALOTHRIN 0.15% [GR] P/P
• LAMBDA CYHALOTHRIN 0.24% [GR] P/P
• LAMBDA CYHALOTHRIN 0.4% [GR] P/P
• LAMBDA CYHALOTHRIN 10% [CS] P/V
• Spodoptera frugiperda (Pheromones) (Attractant pheromones of Lepidoptera)
Insect allies
PREDATORY MITES
LADYBUGS
LACEWINGS
PARASITIC WASPS
HOVERFLIES OR PARASITIC FLIES
PREDATORY BUGS
There are no natural allies
Mycodiplosis oidii (predatory mosquito)
EFFECTIVE PRODUCTS TO ELIMINATE THIS DISEASE
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• Regular monitoring of crops to detect the early presence of larvae.
• Implementation of integrated pest management practices, such as crop rotation and planting at optimal dates.
• Use of cotton varieties resistant or tolerant to Spodoptera frugiperda.
• Use of biological control methods, such as the release of natural enemies or the use of specific baculoviruses.
• Timely application of specific insecticides when necessary, following the recommendations of health authorities.
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