Windshield Wipes


*First generation EUONYMUS SCALE (Unaspis euonymi) nymphs (crawlers) are appearing on their namesake host in southwest Ohio.  The crawlers of this armored scale appear as tiny tannish-yellow flecks on upper and lower leaf surfaces and can be easily seen with a 10X hand-lens.  The crawlers have not yet settled and produced their hard, waxy coverings (tests) meaning that they remain susceptible to topical, contact insecticide applications.  This scale can also be suppressed by using dinotefuran (e.g. Safari) which is a systemic insecticide.  Systemic insecticides have a lower impact on beneficial insects such as the very tiny lady beetles in the genus Sethorus that are commonly observed lurking among the scale; like wolves among sheep.

*Dave Shetlar reported that first generation PINE NEEDLE SCALE (Chionaspis pinifoliae) crawlers, which is another armored scale, are now appearing on conifer hosts in Central Ohio.  The tiny, mobile, rusty-red crawlers can be detected with a hand-lens.  Crawler populations can be reduced using a contact insecticide including soaps, oils, or standard insecticides labeled for use on the infested conifer species.  Infested trees should be closely monitored because eggs may hatch over an extended period time requiring a second insecticide application to kill the late arrivers.  There are two generations per season in Ohio.

*In a late-breaking report, Dave also reported that he and his entomology students found a very cold, and presumably lonely, JAPANESE BEETLE (Popillia japonica) in central Ohio.  Dave noted that he has found adult beetles in mid-May in Ohio, but the last week of April is the earliest that he has ever found an adult out-and-about in the state.  Such an early appearance is highly unusual since peak adult emergence does not typically occur until late-June to early-July in the central part of the state.  The early appearance of the beetle is most likely just a life cycle anomaly.  It does not represent a general shift in the timing of beetle emergence, nor does it necessarily represent a portent of bad things to come!