Full TGIF Record # 19379
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Publication Type:
Author(s):Redmond, Carl T.; Potter, Daniel A.
Title:Enhancement of milky disease for biological control of white grubs
Source:Kentucky Turfgrass Research. 1988, p. 40-41.
Publishing Information:Lexington, KY: University of Kentucky, College of Agriculture, Cooperative Extension Service
Series:Progress Report 319
Keywords:TIC Keywords: Milky disease; Melolonthinae; Popillia Japonica; Chitinase; Dynastinae; Bacillus popilliae; Granules; In vitro; Formulations; Spores; Grubs; Biological pest control; Biological control
Abstract/Contents:Summarizes 3 studies underway on methods to enhance milky disease bacteria(MD) applications for faster and more effective suppression of grubs. Test 1: Test plots were established at two sites in central Kentucky to compare the performance of three formulations of MD under Kentucky conditions. This is the first field test of the new granular and in vitro formulations of MD. Grub populations and disease incidence will be monitored for 3 years. This test will provide Kentucky turf managers with accurate information regarding the effectiveness and speed with which MD will control grub populations. Very low grub populations due to the 1988 summer drought prevented meaningful evaluation after the first growing season. Test 2: Additional test plots were established to determine if MD applications could be enhanced by physically incorporating the formulation into the soil. It is hoped that physical incorporation of MD into the target zone will reduce time required for economic control. Spore powder was applied as a surface application without manipulation, or in conjunction with vertical mowing, core aerification, or re-sodding. Grub populations and disease incidence will be monitored for 3 years. Test 3: Laboratory experiments were conducted which indicated that infectivity of the traditional in vivo and the new in vitro formulations is similar. Other experiments suggested that ingestion of MD bacteria causes rapid cessation of feeding, possibly due to gut paralysis caused by bacterial toxins. This information is important in understanding how MD works, and how quickly an application may reduce grub injury in the field. Enhancement of MD formulations with chitinase is also under study. This enzyme breaks down the lining of the gut wall, and may cause grubs to become infected at much lower rates. Formulation of commercial MD with very small amounts of chitinase could possibly increase the efficacy of field applications. Further results of these long-term investigations will be summarized in upcoming reports.
See Also:See also 1987 research report in Kentucky Turfgrass Research, no. 313 1987, p. 27-28, R=13687. R=13687
Geographic Terms:Kentucky
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Redmond, C. T., and D. A. Potter. 1988. Enhancement of milky disease for biological control of white grubs. KY. Turfgrass Res. p. 40-41.
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MSU catalog number: SB 433 .A1 K4
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