Full TGIF Record # 147049
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Web URL(s):http://usgatero.msu.edu/v08/n08.pdf
    Last checked: 04/15/2009
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Publication Type:
Author(s):Redmond, Carl T.; Potter, Daniel A.
Author Affiliation:Redmond: Research Analyst; Potter: Bobby C. Pass Professor of Entomology, Department of Entomology, University of Kentucky, Lexington, Kentucky
Title:Continuing the search for biological control of white grubs
Source:USGA Turfgrass and Environmental Research Online. Vol. 8, No. 8, April 15 2009, p. [1-8].
Publishing Information:Far Hills, NJ: United States Golf Association, Green Section
# of Pages:10
Keywords:TIC Keywords: Melolonthinae; Biological control; Insect pests; Insect control; Biological control organisms; Cyclocephala; Popillia japonica; Coleoptera
Abstract/Contents:"Scientists at the University of Kentucky continue to explore methods of biological control of white grubs, the larvae of scarab beetles. Part of this investigation included conducting a sampling survey with 33 golf course superintendents throughout Kentucky to assess what parasites and bacterial, fungal, or nematode pathogens were present on the sampled grubs in an effort to identify new potential biological control agents. Survey results included: Masked chafer and Japanese beetle grubs accounted for 64 and 30%, respectively, of white grubs sent in from Kentucky golf courses, with May beetle, green June beetle, and black turfgrass ataenius comprising the rest. Grubs occurred in a wide range of Kentucky soils and pH ranges with no particular relationship between soil type and predominant grub species. Grub populations declined from about 18 per square foot in late August, to about 5 grubs per square foot in October, to less than 2 grubs per square foot the following spring despite no insecticides having been applied. In field studies, warm-season grasses, zoysiagrass and bermudagrass, had the highest densities of masked chafer grubs (about 7 and 4 grubs/0.1 m2 [1 ft2]) respectively, compared to 1.3 and 0.5 masked chafer grubs/0.1 m2 in fairway-height bentgrass and ryegrass, and less than 1-2 grubs/0.1 m2 in all rough-height grasses. Skunk damage was concentrated in fairway-height creeping bentgrass and perennial ryegrass, with almost none in the other grasses, including the zoysiagrass, bermudagrass, and tall fescue. The latter grasses, although they had plenty of grubs, develop thick thatchy mats and/or a dense root system that may be difficult for skunks to dig up."
See Also:See also updated version "The search for biological control of white grubs: In hopes of using the information to protect golf courses, University of Kentucky scientists analyze how Mother Nature limits the number of beetle larvae", USGA Green Section Record, 47(5) September/October 2009, p. 8-12 R=154305 R=154305
See Also:Other Reports from this USGA research project: 2007-12-353
Note:Summary as abstract
Pictures, color
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Redmond, C. T., and D. A. Potter. 2009. Continuing the search for biological control of white grubs. USGA Turfgrass Environ. Res. Online. 8(8):p. [1-8].
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    Last checked: 04/15/2009
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