Be aware that not all of these products are presently registered on blueberries. Percent knock-down and mortality to Japanese beetle adults on blueberry foliage with 2 hour old insecticide residues. Percent knock-down is incremental and mortality is accumulative. Sevin, Malathion and Penncap caused significant mortality within one day, although after four days of beetle exposure, these as well as the Imidan and Lannate treatments all provide nearly 100 percent mortality. Percent knock-down and mortality to Japanese beetle adults on blueberry foliage with 4 day old insecticide residues.
Percent knock-down is incremental and mortality is accumulative.
Penncap provided the best control after one day of beetle exposure. Data from additional evaluations will be made available at the end of the season after the study is over. There is also a significant increase in the emergence of Japanese beetle . Obliquebanded leafroller larvae can also be found feeding on actively growing terminals and increasingly on fruit when young foliage is not present. Potato leafhoppers are prevalent in orchards, whereas white apple leafhoppers are in the egg stage at this time.