Updated: May 23, 2023

Stink bugs are a common pest in many parts of the world, and their life cycle is fascinating. Understanding the stages of their life cycle can help homeowners and farmers better manage populations and prevent infestations. In this article, we will explore the different stages of the stink bug life cycle, from egg to adult.

Egg Stage

Stink bugs begin their life as tiny, yellowish eggs laid in clusters on the undersides of leaves or stems of plants. The female stink bug lays dozens of eggs at a time, and they are usually deposited in protected areas.

The eggs hatch after approximately five days, and the emerging nymphs are small, wingless, and lack the characteristic stinky odor associated with adult stink bugs.

Nymph Stage

During the nymph stage, stink bugs undergo several molts as they grow and develop into adults. Molting is the process of shedding their skin to accommodate their growing bodies.

The first instar nymphs are less than 1 mm long and resemble tiny spiders. As they molt and grow, they develop more distinct markings and colors. Nymphs range in color from green to brown, depending on the species.

The nymph stage lasts approximately four to six weeks for most species. During this time, they feed voraciously on plants, causing damage to crops and ornamental plants.

Adult Stage

Once the nymphs have completed their final molt, they emerge as fully developed adults. Adult stink bugs are recognizable by their shield-shaped bodies and distinctive odor.

Stink bug adults have wings that fold flat over their backs when not in use. They use these wings to fly short distances in search of food or mates.

Adult stink bugs mate during the warmer months of the year, and females will continue to lay eggs until cold weather sets in. Depending on the species, stink bugs may have one or multiple generations per year.

Behavior and Habitat

Stink bugs are attracted to light and warmth, which is why they often find their way into homes during the cooler months of the year. They are also attracted to lights outside of homes, and homeowners may notice them clustering around porch lights or exterior lighting.

Stink bugs are primarily herbivorous, feeding on a wide variety of plants, including fruits, vegetables, and ornamental plants. They use their piercing-sucking mouthparts to pierce plant tissue and feed on the sap inside.

Control and Prevention

Preventing stink bug infestations begins with proper pest management practices. This includes regular inspection of plants for signs of damage or infestation, as well as the use of insecticides when necessary.

Homeowners can also take steps to prevent stink bugs from entering their homes. This includes sealing cracks and gaps in doors, windows, and other entry points. Additionally, homeowners can use yellow sticky traps to capture stink bugs before they enter the home.


Understanding the life cycle of stink bugs can help homeowners and farmers better manage these pests. By knowing when stink bugs are most vulnerable during their life cycle, it is possible to implement effective pest control measures that prevent infestations before they occur.

While stink bugs can be a nuisance, they do serve a purpose in the ecosystem by controlling populations of other insects. By taking steps to prevent and control stink bug populations, we can ensure their impact on our gardens and crops remains minimal.