ISSUE 12 July 29, 2009
NDSU PLANT DIAGNOSTIC LAB REPORT, JULY 1 THROUGH JULY 28, 2009
The lab has received 246 samples since July 1, and of these, 40 were from extension offices. Common problems observed on trees and other horticultural samples over the past month include eriophyid mites (those that produce tiny galls and erineum galls), cynipid wasps, aphids, and spider mites. On turf, melting out was diagnosed. In crop samples, more wheat streak mosaic virus was detected on spring wheat, durum wheat, and winter wheat; various root rot pathogens were recovered on pea, sugarbeet, and soybean; and various abiotic problems, including chemical injury by various modes of action, were suspected. Details of the different diagnoses are available online through the NDSU Plant Diagnostic Lab at http://www.ag.ndsu.nodak.edu/diaglab/reports.htm.
NDSU Plant Diagnostician