Hugo Chávez vor der Wiederwahl?

QC 2011062

Growth of Fomes annosus in the precence of host material from Norway spruce and silver fur

Root and stem material of Norway spruce Picea abies Karst. and silver fir Abies pectinata D.C. were used as substrate for the growth of Fomes annosus (FR.) CKE. On material from Norway spruce the root fungus developed without any inhibitions. The silver fir material exerted strong inhibitory effects on the fungus with all treatments used

Effect of Fomes annosus on seedlings of Picea abies in the presence of Boletus bovinus

The mycorrhiza-forming fungus Boletus bovinus (L. ex FR.) O. KUNTZE was shown to protect seedlings of Norway spruce from the usually fatal attacks, which result from treatment with the root rot fungus Fomes annosus (FR.) CKE. New techniques were developed for the culture and application of both species of the microorganisms. The investigation was performed under greenhouse conditions

Antagonistic effects of some soil fungi on Fomes annosus in laboratory experiments

85 isolates of soil fungi, part of which may be characterized as mycorrhiza fungi, were included in a screening test against the root rot fungus Fomes annosus. It was arrested by 40% of the number and an unoccupied, bright and measurable zone then divided the two microorganisms. Some different types of influence were observed and interpreted. A wide antagonistic spectrum was demonstrated both within and between the species. One isolate of the mycorrhiza fungus Boletus bovinus, one of B. variegatus and one from roots of Monotropa hypopitys inhibited F, annosus most strongly. The inhibition established was of a fungistatic type. In order to widen the knowledge of the variation in sensitivity of F. annosus, 85 isolates mainly from field trials in Norway spruce were selected and screened to three strongly active mycorrhiza-forming fungi. As a rule all root rot isolates were highly sensitive to all three antagonists. Only three exceptions mere obtained. The same kind of pronounced sensibility against toxins produced was demonstrated, when F. annosus was grown in nutrient solutions precultivated with some active mycorrhiza fungi. Finally the importance of inoculation time on the antagonism was studied on solid media. A strong correlation exists between the time advantage and the toxic level obtained

Betingelser för mögelpåväxt på trä : Fält- och laboratoriestudier

QC 2011061

New method of renovating walls sills damaged by mould

QC 2011062

Mögelresistens hos väggbeklädnader i våtrum

QC 2011062