What is June Bug Grub?

June Bug Grub is a term commonly used in the field of entomology to refer to the larvae of June bugs, which are also known as June beetles or May beetles. These insects belong to the family Scarabaeidae and are widely distributed across North America. The term “grub” is used to describe the larval stage of various insects, including June bugs.

Life Cycle of June Bugs

The life cycle of June bugs consists of four stages: egg, larva, pupa, and adult. The adult June bugs are typically active during the summer months, especially in the evenings. They are attracted to lights and can often be seen flying around porch lights or street lamps. The female June bugs lay their eggs in the soil, usually in late spring or early summer. These eggs hatch into larvae, which are commonly referred to as June bug grubs.

Physical Characteristics of June Bug Grubs

June bug grubs are typically white or cream-colored and have a C-shaped body. They have six legs and a well-developed head capsule. The body of the grub is segmented and covered in small, bristly hairs. The grubs have a soft exoskeleton and are relatively large in size, ranging from 1 to 2 inches in length.

Habitat and Behavior of June Bug Grubs

June bug grubs are commonly found in the soil, where they feed on the roots of various plants. They are considered to be pests in agricultural and horticultural settings, as they can cause damage to crops and lawns. The grubs are most active during the night and tend to stay close to the soil surface. They create tunnels in the soil as they feed, which can result in the uprooting of plants.

Feeding Habits of June Bug Grubs

June bug grubs are voracious feeders and can cause significant damage to plants. They primarily feed on the roots of grasses and other plants, which can lead to the wilting and death of the affected plants. The grubs have strong mandibles that they use to chew through the roots. They can consume large quantities of plant material, which can result in the loss of vegetation in infested areas.

Life Span of June Bug Grubs

The life span of June bug grubs varies depending on various factors, including environmental conditions and food availability. In general, the larval stage of June bugs lasts for one to three years. During this time, the grubs go through several molts, shedding their exoskeleton and growing in size. Once they reach maturity, the grubs pupate and transform into adult June bugs.

Importance of June Bug Grubs in the Ecosystem

While June bug grubs are considered pests in agricultural settings, they play an important role in the ecosystem. As they feed on plant roots, they help to break down organic matter in the soil. This process contributes to nutrient cycling and helps to maintain soil fertility. Additionally, the grubs serve as a food source for various animals, including birds, mammals, and other insects.

Control and Management of June Bug Grubs

Controlling June bug grubs can be challenging, especially in large infestations. There are several methods that can be used to manage these pests, including cultural, biological, and chemical control measures. Cultural control involves practices such as maintaining healthy soil, proper irrigation, and regular mowing to discourage the presence of grubs. Biological control involves the use of natural enemies, such as nematodes and certain fungi, to target the grubs. Chemical control involves the use of insecticides to kill the grubs.

Preventing June Bug Grub Infestations

Preventing June bug grub infestations is key to minimizing damage to plants and lawns. Some preventive measures that can be taken include avoiding overwatering, as moist soil attracts the grubs, and maintaining proper lawn care practices, such as regular mowing and aeration. Additionally, removing dead plant material and debris from the garden can help to reduce the presence of grubs.


In conclusion, June bug grubs are the larvae of June bugs and play a significant role in the ecosystem. While they can be pests in agricultural and horticultural settings, they contribute to nutrient cycling in the soil and serve as a food source for various animals. Managing and preventing infestations of June bug grubs require a combination of cultural, biological, and chemical control measures. By understanding the life cycle and behavior of these grubs, it is possible to effectively control their populations and minimize damage to plants and lawns.