The holy handiwork of the Elm Flea Weevil (Orchestes steppensis) is evident on native, non-native, and hybrid elms in southwest Ohio. Holes in elm leaves result from the adult “snout beetles” feeding on the leaves as well as the larvae tunneling between the upper and lower leaf surfaces as leafminers.

I received a phone call yesterday from a homeowner proclaiming, “there’s corn coming up in my lawn!” I asked if the lawn was newly seeded and the caller said it was not; the lawn had been established several years ago. It’s a useful question because wheat is notorious for springing up from errant seed in straw used to cover turf seed.

Magnolia scale is a type of "soft scale" so named because the females are hidden beneath a helmet-like soft leathery covering that provides limited protection. Soft scales can be squashed! This native insect is one of the largest soft scales found in Ohio with mature females measuring as much as 1/2" in diameter. The size and overall shape of mature magnolia scale females commonly make it a poster child for soft scales.

Gypsy moth (Lymantria dispar) caterpillars are becoming evident in areas where populations are present. Citizens are reaching out to local Extension offices to identify the caterpillar and determine what is the best course of action.

 

The caterpillars are voracious feeders and as their numbers build, their appetites expand and plant foliage disappears rather quickly. While they prefer oaks, their host preferences are quite expansive. They seem to enjoy the needles of spruce, especially as larger, or later instar caterpillars.

 

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Tune and watch the latest Turfgrass Times from the OSU Turf Team. This week's video includes updates from Todd Hicks, Dr. Pamela Sherratt, Dr. Dave Gardner, and Dr. Ed Nangle. Updates include: diseases, weather, weeds, overseeding and more. 

Last month, I received an email message from a Lucas County resident that was noticing leaf drop on some maples in her neighborhood. Of course, the diagnostic process immediately begins, and my mind automatically goes to the OSU FactSheet, and I start going through the series of questions. If you aren't familiar with the FactSheet, or need a refresher, this resource is laid out in a order that takes you through the diagnostic process. 

Last Friday, members of the OSU Turfgrass Team gathered to share their expertise in the latest Turfgrass Times You Tube video. Reports from Dr. David Gardner, Dr. David Shetlar (aka the BugDoc), and Dr. Ed Nangle. Dr. Gardner shared a weed update, including management options, and made mention of red thread. Dr. Shetlar discussed insects including: cicadas, May / June beetles, white grubs, and adult craneflies. Dr. Nangle talked about the weather, soil temperatures and mentioned some up coming educational opportunities. 

The annual leaf drop on sugar maples caused by the maple petiole borer (Caulocampus acericaulis) is underway in southwest Ohio. To separate leaf drop by the petiole borer rather than high winds or anthracnose, look for abnormally short petioles on the fallen leaves and for broken petioles that remain attached in the canopy.

I received a phone call yesterday from Mark R. Apelt who asked whether or not the oak shothole leafminer fly (Japanagromyza viridula, syn. Agromyza viridula) could also infest chestnuts. It was an interesting question given that oaks and chestnuts belong to the same family, Fagaceae.

The oak shothole leafminer is a small fly belonging to the family Agromyzidae; the leaf miner flies. The leafminer produces four progressive symptoms: small pinprick-like holes, larger holes, dark brown "blotch mines," and ragged-looking leaves with missing pieces.