Current Issue: July 16, 2021

Iron Chlorosis in Pin Oak and River Birch


Yellow leaves in summer could indicate plant problems.  Yellow leaves on specific plants such as Pin Oak and River Birch could be signs of underlying nutrient issues like iron chlorosis.

How Many Japanese Beetles Will You See This Year?

Japanese beetles on prairie plants

Emergence of Japanese beetle adults is underway and reports, so far, are fewer beetles than usual.

Webbing Bark Lice - Isolated and Unusual

webbing barklice create a "silken tree wrap.”

Some species of barklice, under some circumstances, shroud the tree with silk, possibly for protection and to maintain humidity.  The result is a tree trunk covered with fine silk ("silken tree wrap").  

Aaron Steil Is New Consumer Horticulture Specialist


Steil began the new position June 14, following the retirement of horticulture specialist Richard Jauron. Steil previously worked as assistant director at Reiman Gardens and taught a horticulture lab course for a decade.

Emerald Ash Borer Discovered in Pocahontas County


Emerald ash borer has been found in Pocahontas County for the first time. This invasive insect has now been found in 81 of Iowa’s 99 counties since the first detection in 2010.

Celebrate Iowa Fruit and Vegetable Week July 26-30


Iowa’s commercial horticulture industry contributes $48 million to the state’s economy each year and provides fresh fruits and vegetables to Iowa consumers.