Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:


Open-access article on masked chafer grubs in turfgrass explains management techniques


White grubs, commonly known as masked chafers, are fat, cream-colored, brown-headed larvae that can be pests of turfgrass.

Now gardeners, golf-course owners, and growers who have been battling masked chafers for decades have a new resource. An article in the Journal of Integrated Pest Management delves into five of these turfgrass pest species and the options for managing them.

Adult masked chafers are small brown beetles (10-15 mm long depending on the species) with a distinctive black stripe or mask across the eyes and face. The one shown here (Cyclocephala pasadenae) is common in the southwestern United States from Texas, western Kansas, and Oklahoma to southern California.

Credit: D.C. Lightfoot

"I became interested in these insects because they are among the hardest grub species to control," said Sudan Gyawaly, a doctoral student in the Department of Entomology at Virginia Tech University and lead author of the article.

According to Gyawaly, damage from the masked chafer comes from only one life stage.

"The adults of many scarab beetles feed on plants, but adult masked chafers do not. It is the larvae that are the major pests," he said.

Masked chafer larvae cause their damage by eating the roots of turfgrass. During rainy periods, the grass plants may still be able to send up healthy-looking, green blades, so lawns appear to be doing well. When drier conditions prevail, however, the gnawed-away root system causes the grass to turn brown and die.

High concentrations of white grubs can also draw in insectivores, such as skunks and raccoons, which can cause considerable injury to turfgrass as they excavate the ground in search of the tasty larvae.

Gyawaly is especially interested in biological approaches to reduce grub numbers. This includes the use of entomopathogens, which are organisms that cause disease in insects. He is taking a closer look at the effects of entomopathogenic fungi when paired with chemical insecticides.

"We are getting pretty good results with this approach in the lab, but we aren't getting the results I was expecting in field experiments," he said. "We need to develop some other techniques to increase the efficacy of using entomopathogenic fungi in the field in combination with insecticide."

While that work is progressing, he said he hopes this new JIPM paper will provide a good overview of all of the masked chafer species that are major U.S. turfgrass pests.

"We have a good understanding of the biology of the northern and southern masked chafers, and we have book chapters and publications that talk about these two species. But we don't know the biology of C. pasadenae, C. hirta, and C. parallela very well, so they often go ignored," he said. "That's why I wanted to write this inclusive paper that mentions all of the important species we have in the United States and updates the management information to show how far we have come in terms of their control."


The full article, "Biology, Ecology, and Management of Masked Chafer (Coleoptera: Scarabaeidae) Grubs in Turfgrass" is available at

The Journal of Integrated Pest Management is published by the Entomological Society of America, the largest organization in the world serving the professional and scientific needs of entomologists and people in related disciplines. Founded in 1889, ESA today has more than 7,000 members affiliated with educational institutions, health agencies, private industry, and government. Members are researchers, teachers, extension service personnel, administrators, marketing representatives, research technicians, consultants, students, and hobbyists. For more information, visit

Media Contact

Richard Levine


Richard Levine | EurekAlert!

More articles from Agricultural and Forestry Science:

nachricht Forest Management Yields Higher Productivity through Biodiversity
14.10.2016 | Technische Universität München

nachricht Farming with forests
23.09.2016 | University of Illinois College of Agricultural, Consumer and Environmental Sciences (ACES)

All articles from Agricultural and Forestry Science >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Etching Microstructures with Lasers

Ultrafast lasers have introduced new possibilities in engraving ultrafine structures, and scientists are now also investigating how to use them to etch microstructures into thin glass. There are possible applications in analytics (lab on a chip) and especially in electronics and the consumer sector, where great interest has been shown.

This new method was born of a surprising phenomenon: irradiating glass in a particular way with an ultrafast laser has the effect of making the glass up to a...

Im Focus: Light-driven atomic rotations excite magnetic waves

Terahertz excitation of selected crystal vibrations leads to an effective magnetic field that drives coherent spin motion

Controlling functional properties by light is one of the grand goals in modern condensed matter physics and materials science. A new study now demonstrates how...

Im Focus: New 3-D wiring technique brings scalable quantum computers closer to reality

Researchers from the Institute for Quantum Computing (IQC) at the University of Waterloo led the development of a new extensible wiring technique capable of controlling superconducting quantum bits, representing a significant step towards to the realization of a scalable quantum computer.

"The quantum socket is a wiring method that uses three-dimensional wires based on spring-loaded pins to address individual qubits," said Jeremy Béjanin, a PhD...

Im Focus: Scientists develop a semiconductor nanocomposite material that moves in response to light

In a paper in Scientific Reports, a research team at Worcester Polytechnic Institute describes a novel light-activated phenomenon that could become the basis for applications as diverse as microscopic robotic grippers and more efficient solar cells.

A research team at Worcester Polytechnic Institute (WPI) has developed a revolutionary, light-activated semiconductor nanocomposite material that can be used...

Im Focus: Diamonds aren't forever: Sandia, Harvard team create first quantum computer bridge

By forcefully embedding two silicon atoms in a diamond matrix, Sandia researchers have demonstrated for the first time on a single chip all the components needed to create a quantum bridge to link quantum computers together.

"People have already built small quantum computers," says Sandia researcher Ryan Camacho. "Maybe the first useful one won't be a single giant quantum computer...

All Focus news of the innovation-report >>>



Event News

#IC2S2: When Social Science meets Computer Science - GESIS will host the IC2S2 conference 2017

14.10.2016 | Event News

Agricultural Trade Developments and Potentials in Central Asia and the South Caucasus

14.10.2016 | Event News

World Health Summit – Day Three: A Call to Action

12.10.2016 | Event News

Latest News

Ice shelf vibrations cause unusual waves in Antarctic atmosphere

25.10.2016 | Earth Sciences

Fluorescent holography: Upending the world of biological imaging

25.10.2016 | Power and Electrical Engineering

Etching Microstructures with Lasers

25.10.2016 | Process Engineering

More VideoLinks >>>