Participants in Monday's Southwest Ohio BYGLive! Diagnostic Walk-About held at Stanley Rowe Arboretum observed final instar nymphs, called "pupae," of the Mulberry Whitefly (Tetraleurodes mori) on the undersides of holly leaves. The round, shiny black pupae are ringed in a white fringe and are commonly mistaken for a scale insect. Indeed, whiteflies are not "flies" (order Diptera); they belong to the same order (Hemiptera) as scale insects and share certain traits with both armored and soft scale insects.

Populus grandidentata, commonly called large-tooth aspen, big-tooth aspen, American aspen, or white poplar, is a deciduous tree native to eastern North America. In northeast Ohio, it is in full bloom and the floss is falling off the fruiting structure and sticking to the sidewalks or turf. 

Several years back I bought this shade-loving shrub at one of the Secrest Arboretum sales.  This is the first year it has flowered.  I can’t find the tag naming the plant.  Can you ID it for me? - Thanks, Skip. 

 

  This was the e-mail impetus for this bygl-alert, coming from Dr. Skip Nault, Professor Emeritus, entomologist, and former Director of the Ohio State University’s Ohio Agricultural Research and Development Center (OARDC) in Wooster. The pictures in this alert are from Skip. 

 

  The answer to Skip’s question is that it is a...

On April 11, I reported that the adults of three leafmining sawflies were mating and laying eggs on their host trees in southwest Ohio (see BYGL Alert! Sawfly Leafminers Fly). Today, I noticed some heavy leafmining damage by one of the sawflies, the Hawthorn Leafminer (Profenusa canadensis), on its namesake host in a hospital parking lot in the southwest part of the state.

Poison hemlock (Conium maculatum) is one of the most lethal plants found in North America. This biennial weed is now producing flowers in southwest Ohio. So, the clock is ticking on preventing seed production by this non-native invasive plant.

In my May 1, 2017, BYGL Alert! posting (Please Report Early-Bird Periodical Cicadas), I noted that Gene Kritsky (Mount St. Joseph University, Cincinnati) was predicting that we will see an "early emergence" of some members of Brood X of the 17-year periodical cicadas (Magicicada spp.) this spring even though this brood is not expected to emerge full force until 2021. In fact, as you can see by the photos I took in Springdale (Hamilton County), OH, the emergence is now well underway.

We have written a number of BYGL reports over the past several years on the springtime occurrence of leafmining damage on wild Ohio buckeyes caused by an unidentified leafmining fly in Ohio. During this week's BYGL online diagnostic inservice yesterday, Curtis Young (OSU Extension, Van Wert County) reported that he is seeing a return of the damage in northwest Ohio. Likewise, I have seen the damage in the southwest part of the state.

Peach Leaf Curl is a springtime disease caused by the fungus Taphrina deformans. The fungus can infect peach (Prunus persica) as well as a few other members of the Prunus genus. The disease can be devastating in fruit orchards, but it can also appear on ornamental (flowering) peach trees in landscapes and nurseries; the "ornamental" designation does not impart resistance.

Northwest Ohio is celebrating Blue Week, May 16 - 23, 2017. A symbol of the Oak Openings Region, the wild blue lupine is a native plant that can be found not only growing, but thriving in sandy soils including at the sand dunes in Oak Openings Metropark and Kitty Todd Nature Preserve - both in Lucas County. This brilliant blue flowering plant had been lost in this natural landscape in the 1980s as a result of mowing the prairie-type habitat, the use of broad spectrum weed control, and fire suppression. However, it has recently made a come-back in natural areas and gardeners are planting it...

Erineum Patches may be found on the upper or lower leaf surfaces of several species of deciduous trees in Ohio. They are considered a type of plant gall and their general appearance accounts for common names such as velvet galls or felt galls.