Full TGIF Record # 40967
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Publication Type:
Author(s):Villani, Michael; Nyrop, Jan; Dalthorp, Dan
Author Affiliation:Department of Entomology, Cornell University, New York State Agricultural Extension Service, Geneva, NY 14456
Title:Validation of a scarab grub sampling plan for home lawns
Source:Cornell Turfgrass: Annual Report 1996-1997. August 1997, p. 45-50.
# of Pages:6
Publishing Information:[Ithaca], NY: Cornell University
Keywords:TIC Keywords: Lawn turf; Sampling; Soils; Surfaces; Disease control; Preventive control; Insect control; Risk assessment; Decision-making; Rhizotrogus
Abstract/Contents:"A method of sampling lawns for deciding on the need for controlling European chafer larvae was previously developed. When larvae are abundant enough to cause damage to turf, they are so usually only in portions (patches) of properties whereas average density over an entire site is often less than a damage threshold of 5-10 grubs per ft2. To account for this, an empirical relationship between the size of the largest patch of European chafer larvae at a site and site-wide density was used in the development of the decision guide. The decision guide also makes use of a risk rating system wherein properties with large amounts of shade and low proportion of Kentucky blue grass are not sampled and are classified as not requiring treatment. The pattern of patch size in relation to average density was found to be quite robust and can therefore serve as a basis for the protocol for deciding on the need for control. The risk rating system was also found to be robust. Patterns of grub abundance were found to be correlated in time. The European chafer decision guide can be depended on to provide reliable decisions on the need for insecticide applications 50-80% when compared with prophylactic treatments."
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Villani, M., J. Nyrop, and D. Dalthorp. 1997. Validation of a scarab grub sampling plan for home lawns. Cornell Turfgrass Ann. Rep. p. 45-50.
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