The reproductive success of sibling cocklebur plants (Compositae: Xunthium strumarium) was monitored after growth at different levels of availability of water and nutrient resources. Variation in reproductive success among individual plants was related to physiological, structural, and phenological characteristics. Reproductive success increased with increased availability of resources, but the...

Proc. Amer. Soc. Hort. Sci. 55: 247-253. 1950. 27. SCHAEFER, V. J. The formation of ice crystals in the laboratory and the atmosphere. Chem. Rev. 44: 291-320. 1949. 28. SCHOONOVER, W. R., BROOKS, F. A., and WALKER, H. B. Protection of orchards against frost. California Agr. Ext. Circ. No. 111. 1939. 29. SEEMANN, J. tJber die Bedeutung der Unterkiihlung fur die Selektion frostresistenter Bohnenp...

The amino acid antimetabolite, DL-p-fluorophenylalanine (FPA), inhibited induction of flowering in the short-day cocklebur plant, Xanthium pensylvanicum Wall., primarily by interfering with processes occurring during the inductive dark period. At the concentrations used the inhibitor had little effect on subsequent vegetative development of the plant.The inhibition was largely reversed (interna...

Members of the Fusarium graminearum species complex (FGSC) are the primary cause of Fusarium head blight (FHB) of wheat, and frequently contaminate grain with trichothecene mycotoxins that pose a serious threat to food safety and animal health. The species identity and trichothecene toxin potential of 151 FGSC isolates collected from wheat in Uruguay were determined via multilocus genotyping. A...