Education Commons^™

Ec94-138 Pigweed Identification: A Pictorial Guide To The Common Pigweeds Of The Great Plains, M.J. Horak, D.E. Peterson, D.J. Chessman, L.M. Wax

University of Nebraska-Lincoln Extension: Historical Materials

Several pigweed species are found in the Great Plains. Pigweeds commonly reduce crop yields and interfere with harvest. One means of controlling these weeds is through the use of herbicides. Recent research indicates that some pigweed species respond differently to various herbicides; therefore, proper identification is needed for good control.

This extension contains a generalized distribution map; photographs of seeds, seedling, and mature plants; and text describing other identifying features for each pigweed species. The species are grouped with others that have similar shape and form. The pigweed species listed in this publication are: redroot pigweed, smooth pigweed, Powell amaranth, …

Ec94-132 Freeze Injury To Nebraska Wheat, Robert N. Klein, Drew J. Lyon, John E. Watkins

University of Nebraska-Lincoln Extension: Historical Materials

Nebraska’s adverse weather conditions affect winter wheat during much of its growth. The newer varieties of wheat have increased winter hardiness, and better management practices have reduced winter injury of winter wheat, yet low temperature injury during winter and spring can be destructive. Wheat has little resistance to low temperatures after it begins growing in the spring; therefore, injury from freezes at this time can occur in any part of the state. This publication describes temperature conditions that cause winter injury, symptoms of injury at different spring growth stages, and management practices to use when wheat is injured.

G94-1207 Scab Of Wheat, John E. Watkins, Ben Doupnik, Jr.

University of Nebraska-Lincoln Extension: Historical Materials

The identification of and disease cycle of wheat scab is described along with its management. Guidelines for using wheat contaminated with vomitoxin also are included.

Scab or Fusarium head blight is an important disease of wheat, barley, oats, rye and wheatgrasses. Scab manifests itself by the premature death or blighting of spikelets in the wheat head. Direct yield losses are often minor, but can be higher than 50 percent in severely infected fields. The economic significance is magnified by the possibility that the low quality, shriveled grain also can become contaminated by mycotoxins (e.g. vomitoxin, zearalenone).

G94-1200 Anthracnose Diseases Of Shade Trees (Revised July 1997), Laurie J. Stepanek, Mark O. Harrell, David S. Wysong

University of Nebraska-Lincoln Extension: Historical Materials

This NebGuide describes anthracnose diseases in sycamore, ash, oak, maple and walnut trees and offers suggestions for control.

Anthracnose diseases affect a wide variety of plants including many popular shade trees. Sycamore, ash, oak, maple, and walnut commonly exhibit symptoms each spring. Although the symptoms may appear serious, anthracnose diseases rarely kill trees. In most cases, healthy trees quickly recover from anthracnose infections with little damage to their long-term health.