June 23, 2010

Evergreens Hit by Mother’s Day Cold Snap


In the last three weeks the ISU Plant and Insect Diagnostic Clinic has received Norway spruce, blue spruce and concolor fir images (Pictures 1 and 2) and plant samples with symptoms of frost injury. Jesse Randall, ISU Extension Forester has reported damage in locations around the state. Susceptible plants include spruce, fir, Douglas fir and occasionally pine. 


Lightningbugs Putting on a Display

The flash of a lightningbug on a summers evening still inspires most of us to reach out and try to catch the enchanting light. Lightningbugs can be placed in a container for closer obser

Ascochyta Leaf Blight of Lawns


Japanese Beetle Season is Underway

The first reports of the Japanese beetle for the year have been received.   And so it starts.

Carpenter Bees Buzz and Bore

Carpenter bee calls and samples continue to arrive, and the reported distribution has spread northward since the last update on this "southern" insect.  See the map below.

Control of Birdsfoot Trefoil in the Lawn

Birdsfoot trefoil (Lotus corniculatus) is a conspicuous plant in some lawns in June and July. Grown for pasture and hay, birdsfoot trefoil has escaped to roadsides and waste areas. It is