Plant Disease Clinic Update - June 13, 2007

Samples with the following problems have been seen in the Clinic lately:


Angular leaf spot on zucchini

Apple scab on crabapple (see this week's article)

Environmental stress on maple and spruce (many samples)

Environmental tattering on oak and maple


Hickory petiole gall


Iron chlorosis on pin oak


Leaf spot on turfgrass


Maple bladder gall


Pear leaf blister mite


Phomopsis tip blight on cedar


Environmental stress on spruce, causing browning of the newest growth.  Similar symptoms have been reported from throughout the state, often concentrated on the south and west sides of the tree.


Environmental stress on spruce, causing browning of the newest growth. Similar symptoms have been reported from throughout the state, often concentrated on the south and west sides of the tree.

Category: 
Tags: 

Links to this article are strongly encouraged, and this article may be republished without further permission if published as written and if credit is given to the author, Horticulture and Home Pest News, and Iowa State University Extension and Outreach. If this article is to be used in any other manner, permission from the author is required. This article was originally published on June 13, 2007. The information contained within may not be the most current and accurate depending on when it is accessed.