Japanese beetle, Popillia japonica Newman is a major pest of turf and ornamentals. Laboratory bioassays were conducted to evaluate the potential interactions between a biological control agent, Heterorhabditis marelatus (Nematoda: Heterorhabditidae) IN strain and the insecticide halofenozide against both overwintered and nonoverwintered 3rd instars of Japanese beetle. Treatments consisted of all combinations of 2 rates of halofenozid with H. marelatus nematodes Imidacloprid was used as a standard. Percentage larval mortality was evaluated at 7, 14, and 21 d after treatment. No deleterious effects were observed. The nematode treatments generally produced significantly greater larval mortality relative to both chemical treatments. Twenty-one days after treatment, both rates of nematodes resulted in 100% mortality, whereas insecticide treatments did not surpass 60% mortality. No synergism was detected in any of the combination treatments. There were no significant differences in nematode reproduction in larvae exposed to halofenozide and nematodes versus larvae exposed to only nematodes.
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1 February 2000
Interaction Between Halofenozide and the Entomopathogenic Nematode Heterorhabditis marelatus for Control of Japanese Beetle (Coleoptera: Scarabaeidae) Larvae
C. M. Mannion,
H. E. Winkler,
D. I. Shapiro,
T. Gibb
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Journal of Economic Entomology
Vol. 93 • No. 1
February 2000
Vol. 93 • No. 1
February 2000
biological control
halofenozide
Heterorhabditis marelatus
imidacloprid
Popillia japonica