Cliff Sadof, Extension Ornamental Entomology Specialist ,
Japanese beetle adults are more abundant and earlier this year
than they have been for a number of years. Adults feed on the leaves
of over 300 species of plants, and on most flowers. Protect flowers
and foliage with weekly applications of insecticides like carbaryl
(Sevin)or permethrin (Eight). Turf that has had a history of grub
damage ought to be protected with soil applications of imidacloprid
(Grubex) or halofenazide (Mach 2).
For more information on Japanese Beetles, please refer to specific
bulletins on turf (E-61) and (E-75) for
more details on biology and control.