Survey of 1977 crop year preharvest corn for vomitoxin

Survey of 1977 crop year preharvest corn for vomitoxin.

Fifty-two preharvest corn samples were collected in mid-October 1977 from 26 farms in a four-county area of northwest Ohio. Vomitoxin ranging from 0.5 to 10 microgram/g was found in 24 of the samples. Analysis for vomitoxin was by gas-liquid chromatography. Preceding harvest in northwest Ohio, unusual wet conditions prevailed, making it favorable for Fusarium growth. Gibberella zeae-infected ke...

Integration of Crop Management and Genetics for Control of Preharvest Aflatoxin Contamination of Corn

Aflatoxin contamination of corn in the field is influenced by several factors. In the southern U.S., insect populations are usually large every year. Drought caused by warmer and drier than normal weather is conducive to A. flavus infection and aflatoxin contamination of corn, Zea mays L. When loose-husked hybrids are used in the southern U.S., they accentuate insect damage and aflatoxin contam...

Re-examination of 1972 Midwest corn for vomitoxin.

Social welfare expenditures, fiscal year 1977.

In fiscal year 1978, social welfare expenditures under public laws reached $394.5 billion, a 9.1-percent increase over the previous year. When adjusted for price and population changes, the total was only 2.5 percent higher in "real" terms. Per capita real expenditures rose by 1 percent in 1978, compared with an increase of 2 percent in 1977. For the second successive year, social welfare expen...

Production of vomitoxin on corn by Fusarium graminearum NRRL 5883 and Fusarium roseum NRRL 6101.

Two vomitoxin-producing isolates of Fusarium spp. were grown on cracked corn for 1 to 8 weeks at 15, 20, 25, 28, and 32 degrees C. Maximum production of vomitoxin by Fusarium graminearum Schw. NRRL 5883 occurred at 30 degrees C and 40 days, and that by Fusarium roseum Schw. NRRL 6101 occurred at 26 degrees C and 41 days. These optimum production points were determined from response surface cont...