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Turfgrass Entomology Update Rutgers University Albrecht Koppenhöfer. Research Projects:. Mating disruption of oriental beetle Biological and biorational control of annual bluegrass weevil Steinernema scarabaei for long term white grub suppression

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Turfgrass entomology update rutgers university albrecht koppenh fer
Turfgrass Entomology UpdateRutgers UniversityAlbrecht Koppenhöfer


Research projects
Research Projects:

  • Mating disruption of oriental beetle

  • Biological and biorational control of annual bluegrass weevil

  • Steinernema scarabaei for long term white grub suppression

  • Entomopathogenic nematode application and ecology

  • New chemistry for white grubs and annual bluegrass weevil management


Steinernemascarabaei for long term

white grub suppression

  • isolated from epizootics in Japanese and oriental beetle larvae in turfgrass areas in central NJ

  • biology similar to that of other EPN species

  • appears to be rather specific to white grubs

  • High pathogenicity and high field efficacy against many white grub species

Nematode-infected grubs

S. scarabaeiH. bacteriophora


Long-term suppression

of white grubs by S. scarabaei

- Field experiments -

  • 4’ x 4’ Kentucky bluegrass plots enclosed by 5” high ‘Emerald Edge’.

  • 160 OB larvae (late L2 & early L3; 10/ft2) released 1 wk before treatment.

  • Application with watering can (~0.5” water) in mid-September (early L3).

  • Field irrigated as necessary to keep out of excessive drought stress.


Timing of sampling activities

Seasonal

life-

cycle

Annual

White Grub

Appl.

EPN

EPN

EPN

EPN

Grub

EPN

Grub


Long term suppression

of white

grubs by

S. scarabaei

Expt. 1

Treated 9/17/02

0-2.5 B Ss/ha


Long-term suppression

of white

grubs by

S. scarabaei

Expt. 2

Treated 9/19/03

0-0.6 B Ss/ha


Long-term suppression

of A. orientalis in turfgrass

by S. scarabaei

Field experiments (1.5 m2 microplots, 10 L3/0.1 m2)


Conclusions:

S. scarabaei for white grub control:

  • has outstanding potential as a curative control agent for many white grub species.

  • suppresses grub populations for 1-2 years after application.

  • is effective in a wide variety of soil types.

  • may be a good candidate for inoculative releases.


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