EFFECTS OF THE CORD-FORMING SAPROTROPHS HYPHOLOMA-AUSTRALE AND PHANEROCHAETE-FILAMENTOSA AND OF AMMONIUM SULFAMATE ON ESTABLISHMENT OF ARMILLARIA-LUTEOBUBALINA ON STUMPS OF EUCALYPTUS-DIVERSICOLOR
Mh. Pearce et al., EFFECTS OF THE CORD-FORMING SAPROTROPHS HYPHOLOMA-AUSTRALE AND PHANEROCHAETE-FILAMENTOSA AND OF AMMONIUM SULFAMATE ON ESTABLISHMENT OF ARMILLARIA-LUTEOBUBALINA ON STUMPS OF EUCALYPTUS-DIVERSICOLOR, Mycological research, 99, 1995, pp. 951-956
Freshly cut karri (Eucalyptus diversicolor) thinning stumps were simul
taneously inoculated with the pathogen Armillaria luteobubalina and ei
ther Hypholoma australe or Phanerochaete filamentosa. The stumps were
inoculated with H. australe and and P. filamentosa either above- or be
low-ground, and treated with either 40% (w/v) aqueous ammonium sulpham
ate solution (AMS) or water. Fungal colonization 2 yr after inoculatio
n was assessed. AMS treatment had several highly significant effects.
Without AMS, neither biocontrol agent significantly reduced Armillaria
colonization. However, with AMS, both P. filamentosa and H. australe
significantly reduced Armillaria colonization, P. filamentosa being mo
re effective. Below-ground inoculation was more effective in reducing
Armillaria colonization than above-ground inoculation In the absence o
f the biocontrol agents, AMS increased below-ground colonization by Ar
millaria compared with non-AMS treated stumps, but reduced colonizatio
n at and above ground level. Stump decay was increased, and coppice oc
currence reduced, with AMS treatment. The naturally-occurring fungi St
ereum hirsutum and Trametes versicolor fruited only on AMS stumps, whe
reas Chondrostereum purpureum fruited only on non-AMS stumps. Fruiting
by Hypholoma australe was enhanced by AMS, whereas Armillaria luteobu
balina fruiting was significantly greater on non-AMS stumps.