Samples from May and June showed a wide range of plant health issues across crops, with both diseases and abiotic factors involved that, in some cases, played a central role in favoring opportunistic fungi. Conifers, in particular, frequently exhibited needle blights related to environmental stresses. The flow of the diagnostic samples is definitely increasing and weather conditions with strong rains have contributed to the appearance of bacterial diseases.

Guignardia Leaf Blotch of Aesculus is a fungal disease that is commonly observed on buckeyes and horsechestnuts in Ohio at this time of the year. However, don’t leap to the conclusion that all leaf blotches are symptomatic of this disease.

The OGIA/OSU Extension Hands-On Diagnostic Walkabout at Cox Arboretum. The Walkabouts are for Green Industry professionals and provide comprehensive, hands-on training. Participants examine and discuss plants, plant pests, plant diseases, landscape designs, and other points of interest.

What's happening in your turf? Watch the latest edition of the Turfgrass Team Times. Turf Team Times is a weekly YouTube video from the OSU Turfgrass Team with updates about what is happening in turf. It provides timely and relevant updates for turfgrass professionals and homeowners.

These maples didn’t look bad from far away. But up close was a different story.

The OGIA/OSU Extension Hands-On Diagnostic Walkabouts for Green Industry professionals are a comprehensive, hands-on training. Participants examine and discuss plants, plant pests, plant diseases, landscape designs, and other points of interest.

Watch the latest edition of the Turfgrass Team Times. Turf Team Times is a biweekly YouTube video from the OSU Turfgrass Team with updates about what is happening in turf.  It provides timely and relevant updates for turfgrass professionals and homeowners. 

Wart-like bead galls are rising from the leaf surfaces of poison ivy and fragrant sumac. The galls on both plants are the handiwork of the Poison Ivy Leaf Gall Mite (Aculops rhois).

Late last week, I came across a nest of early instar, first-generation Fall Webworms (Hyphantria cunea, family Erebidae) on a boxelder (Acer negundo) in southwest Ohio. We see two generations in Ohio, sometimes three in the southern part of the state.

Buttonbush has become a favored native in Ohio landscapes. However, observations in southwest Ohio have revealed a native moth that produces leafmining and shoot-boring damage. The shoot symptoms mimic freeze/frost damage.