The effect of a purified water-soluble fraction of a Fusarium roseum 'Graminearum' culture on reproduction of white Leghorn females.

White Leghorn females (36 weeks old) in egg production were individually fed a purified water-soluble fraction residue remaining from the water extract and a crude culture of Fusarium roseum 'Graminearium'. Each fraction was fed at 3% of the diet for 6 weeks followed by 2 weeks with a control diet. Hens were inseminated weekly with .05 ml of pooled semen from males given control diets. The purified water-soluble fraction increased feed consumption during the test periods. During the posttest period, hens fed test diets consumed less feed than those fed a control diet. All test diets did not affect body weight change during the test periods. There was a significant increase in body weight of hens on the diet containing 3% crude culture and a marked decrease in body weight of hens fed the purified water-soluble fraction during the posttest period. Egg production and egg weight were not affected by treatments during the test and posttest periods. Fertility was reduced by the crude culture of F. roseum 'Graminearum' during the 6-week test. Hatchability of fertile eggs was significantly reduced by the purified water-soluble fraction and the crude culture of F. roseum 'Graminearum'. Hatchability rapidly increased when these toxic diets were replaced with control diets. The majority of embryo mortality occurred during 5 days of incubation. The major mycotoxins responsible for reduced hatchability of fertile eggs appeared to be water soluble components of F. roseum 'Graminearum' and not trichothecenes or zearalenone.