How Long Do Army Worms Last?
Army worms, also known as fall armyworms, are a type of caterpillar that can cause significant damage to crops and landscapes. One of the most common questions regarding these pests is: how long do army worms last? Understanding the lifecycle and lifespan of army worms is crucial for effective pest management and preventing crop losses. In this article, we will explore the various stages of an army worm’s life and discuss how long they typically last in each stage.
Life Cycle of Army Worms
The life cycle of army worms consists of four main stages: egg, larva, pupa, and adult. The duration of each stage can vary depending on factors such as temperature, humidity, and availability of food sources.
1. Egg Stage: Army worms lay their eggs in clusters on the underside of leaves or in the thatch of grass. The eggs are typically round and yellowish-white in color. The egg stage can last anywhere from 3 to 7 days, with warmer temperatures shortening the duration.
2. Larval Stage: Once the eggs hatch, the larvae emerge and begin feeding on the host plants. This stage is the most damaging to crops, as army worms are voracious eaters. The larval stage can last from 2 to 4 weeks, with the larvae molting several times as they grow. During this stage, army worms can cause significant damage to crops, including corn, sorghum, and cotton.
3. Pupa Stage: After reaching the final larval instar, army worms enter the pupal stage. During this stage, they transform into adults. The pupal stage typically lasts for about 5 to 7 days.
4. Adult Stage: Once the pupal stage is complete, the adult army worm emerges. The adult stage is relatively short, lasting only about 2 to 3 weeks. During this time, the adults mate, lay eggs, and eventually die.
Factors Affecting the Lifespan of Army Worms
Several factors can influence the lifespan of army worms, including:
– Temperature: Warmer temperatures can accelerate the development of army worms, leading to shorter lifespans in each stage.
– Food availability: Adequate food sources can support the growth and development of army worms, potentially extending their lifespan.
– Pesticide exposure: Pesticides can reduce the lifespan of army worms by affecting their development and survival rates.
Conclusion
In conclusion, the lifespan of army worms can vary depending on various factors such as temperature, humidity, and food availability. On average, an army worm’s lifecycle can last from 2 to 4 weeks, with the larval stage being the most damaging to crops. Understanding the lifecycle and lifespan of army worms is essential for implementing effective pest management strategies and minimizing crop losses.
