The effect pf selected herbicides on pathogenicity and growth of Nectria galligena Bres.
Zbigniew Burgieł, Marek Grabowski
Department of Plant Protection
Faculty of Horticulture, Agricultural University
29 Listopada 54, 31-425 Kraków, Poland
Herbicides tested in vitro showed an inhibiting effect on the development
of the Nectria galligena mycelium. The strongest fungistatic
activity was observed when Kerb 50 WP was applied. The lowest herbicide
concentration in the medium caused a 21 and 30% lower growth of the colony
than that of the control. A less strong activity against the mycelium of Nectria
galligena was observed when preparation Basta 150 SL was applied, and
the least strong activity was shown by Roundup. All the herbicides applied
in high concentrations caused changes in the morphology of the mycelium.
The results of the study showed that the presence of herbicides in the
inoculum can increase or decrease the size of the lesions caused by the pathogen
on shoots. An increase in the extent of lesions was observed when
they were infected by the mycelium derived from PDA-medium containing
Roundup. The inoculum obtained from cultures where glufosinate (Basta 150
SL) and propyzamide (Kerb 50 WP), 10, 100 mg cm-3
were applied showed higher pathogenicity to apple shoots.
Burgieł Z., Grabowski M., 1996. The effect of selected herbicides on pathogenicity and
growth of Nectria galligena Bres. Folia Horticulturae 8/2: 13-19.