Soybean Cyst Nematode Reproduction in the North Central United States

Teaching Methods and Tools Used In Food Safety Extension Education Programs in the North Central Region of the United States

One of the ways to ensure food safety is to educate the public. Of the organizations providing food safety education in the United States (U.S.), the Cooperative Extension System (CES) is one of the most reliable. The effectiveness CES programs depends not only on what is being taught but also on how it is taught. Both a needs-based curriculum and how that curriculum is delivered are equally im...

Engineered Soybean Cyst Nematode Resistance

Aboveground Feeding by Soybean Aphid, Aphis glycines, Affects Soybean Cyst Nematode, Heterodera glycines, Reproduction Belowground

Heterodera glycines is a cyst nematode that causes significant lost soybean yield in the U.S. Recent studies observed the aphid Aphis glycines and H. glycines interacting via their shared host, soybean, Glycine max. A greenhouse experiment was conducted to discern the effect of A. glycines feeding on H. glycines reproduction. An H. glycines-susceptible cultivar, Kenwood 94, and a resistant cult...

Molecular Identification of Fungi Associated with Vascular Discoloration of Soybean in the North Central United States

Brown stem rot (BSR) is one of the most important diseases of soybean (Glycine max (L.) Merr.) in the north-central soybean-production region (10), yet the causal agent of the disease is poorly known. The disease is characterized by a browning of the vascular system and pith, and characteristic chlorosis and necrosis of the foliage develops late in the season, usually in August (2). However, si...

Distribution of soybean cyst nematode in nebraska.

A survey of 552 soybean fields in 20 counties in Nebraska in 1986-88 revealed 35 fields infested with the soybean cyst nematode (SCN), Heterodera glycines. Identification was confirmed with a greenhouse bioassay, using 'Lee 74' soybean, and by the application of a DNA hybridization probe derived from SCN mitochondrial DNA. Most of the SCN-infested fields were located on the Missouri River flood...