Synthesis and Testing of Compounds That Inhibit Soybean Cyst Nematode Egg Hatch

Activity of fungal culture ltrates against soybean cyst nematode and root-knot nematode egg hatch and juvenile motility

Susan L.F. MEYER 1; , Robin N. HUETTEL 1;†, Xing Zhong LIU 2, Richard A. HUMBER 3, Jean JUBA 4 and James K. NITAO 1;‡ 1USDA, ARS Nematology Lab, Bldg 011A, Rm 165B, BARC-West, 10300 Baltimore Avenue, Beltsville, MD 20705-2350,USA 2Systematic Mycology and LichenologyLaboratory, Institute of Microbiology, Chinese Academy of Sciences, P.O. Box 2714, Beijing 100080, China 3USDA, ARS Plant Protectio...

Engineered Soybean Cyst Nematode Resistance

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...

Influence of herbicide application to soybeans on soybean cyst nematode egg hatching.

The hatching of Heterodera glycines eggs in soybean root exudates collected after postemergence application of three herbicides, and the hatching potential of H. glycines eggs from females feeding on herbicide-treated plants, were measured in vitro. Hatching in all root exudate solutions (RES) was greater than in deionized water but less than in 0.003 M ZnSO solution. Filtering RES with a 0.22-...

In-vitro Assays of Meloidogyne incognita and Heterodera glycines for Detection of Nematode-antagonistic Fungal Compounds.

In-vitro methods were developed to test fungi for production of metabolites affecting nematode egg hatch and mobility of second-stage juveniles. Separate assays were developed for two nematodes: root-knot nematode (Meloidogyne incognita) and soybean cyst nematode (Heterodera glycines). For egg hatch to be successfully assayed, eggs must first be surface-disinfested to avoid the confounding effe...