Biological control agents for white grubs (coleoptera: scarabaeidae) in anticipation of the establishment of the Japanese beetle in California

Albrecht M. Koppenhöfer, Michael Wilson, Ian Brown, Harry K. Kaya, Randy Gaugler

Research output: Contribution to journalArticlepeer-review

50 Scopus citations


We tested biological control agents for the control of 3rd-instar scarab turfgrass pests, both for the masked chafer Cyclocephala hirta LeConte and the Japanese beetle, Popillia japonica Newman. The former species is endemic in California whereas the latter, although not yet established, constitutes a permanent serious threat to agriculture and horticulture in California. We conducted experiments using C. hirta in California and P. japonica in New Jersey. A field trial conducted in 2 different California turfgrass sites compared the field persistence in the absence of hosts of Bacillus thuringiensis Berliner subspecies japonensis Buibui strain, the milky disease bacterium, Paenibacillus (=Bacillus) popilliae (Dutky), and the entomopathogenic nematodes Steinernema kushidai Mamiya and Heterorhabditis bacteriophora Poinar to that of the organophosphate diazinon. Soil samples taken 0-70 d after applications were bio-assayed with P. japonica. Only diazinon and the entomopathogenic nematode S. kushidai caused substantial mortality and S. kushidai activity persisted significantly longer than diazinon activity. In greenhouse experiments, combinations of entomopathogenic nematode species usually resulted in additive mortality of scarab larvae. Combinations of S. kushidai and diazinon also resulted in additive mortality. In field trials, the efficacy of H. bacteriophora and especially S. kushidai and S. glaseri, was comparable to that of diazinon over 14-18 d. However, it is likely that at least S. kushidai would have outperformed diazinon over an extended period because of its longer persistence and potential for recycling in the hosts. S. kushidai, should it become commercially available, deserves further examination as an alternative to chemical white grub control especially as a highly compatible component of sustainable turfgrass management.

Original languageEnglish (US)
Pages (from-to)71-80
Number of pages10
JournalJournal of economic entomology
Issue number1
StatePublished - 2000

All Science Journal Classification (ASJC) codes

  • Ecology
  • Insect Science


  • Bacillus thuringiensis
  • Cyclocephala hirta
  • Heterorhabditis
  • Insect-parasitic nematodes
  • Popillia japonica
  • Steinernema


Dive into the research topics of 'Biological control agents for white grubs (coleoptera: scarabaeidae) in anticipation of the establishment of the Japanese beetle in California'. Together they form a unique fingerprint.

Cite this