Comparison of the mycoparasites Pythium periplocum, P. acanthicum and P. oligandrum

Pythium periplocum, an aggressive mycoparasite of Botrytis cinerea causing the gray mould disease of grape-vine

“…1a). In the interaction experiments between P. periplocum and B. cinerea, the extensive hyphal coilings around the host hyphae as reported elsewhere [14] have not been observed in the present study. However, direct penetration into the host hyphae by the mycoparasite (Figs.…”

“…A recent report indicates that it can parasitize a number of host fungi, coiling around their hyphae or even penetrating within. It has been considered to be a broad-spectrum mycoparasite at par with P. oligandrum and P. acanthicum [14]. In this study, it was found that P. periplocum was an aggressive mycoparasite of Botrytis cinerea, which causes the gray mould disease of the grape-vine.…”

“…Mycoparasitism by the members of the genus Pythium is also well known, the most important fungi being Pythium oligandrum and Pythium acanthicum [10^13]. Pythium periplocum has also been considered as a mycoparasite and recently, together with P. oligandrum and P. acanthicum, it was studied on 73 species of ¢lamentous fungi and a comparison of the mycoparasitism of the three species was made [14]. Apart from these three species of Pythium, there are sporadic reports of mycoparasitism by other species like Pythium acanthophoron [15] and Pythium radiosum [9].…”

Parasitism of macroconidia, chlamydospores and hyphae of Fusarium culmorum by mycoparasitic Pythium species

“…on agar strips, P. periplocum tended to be the most effective mycoparasite. Ribeiro & Butler (1995) also found that their isolates of P. periplocum were significantly better at protecting sugar beet seedlings from attack by P. ultimum (on WA) than were P. oligandrum and P. acanthicum. However, before the relative efficacies of the several mycoparasitic Pythium spp.…”

“…and their host fungi. In laboratory experiments, antagonism by the mycoparasites P. oligandrum, P. acanthicum, P. periplocum (Drechsler, 1943;Deacon & Henry, 1978;Laing & Deacon, 1991;Ribeiro & Butler, 1995), P. acanthophoron (Lodha & Webster, 1990), P. mycoparasiticum (Laing & Deacon, 1990 and P. nunn (Lifshitz et al, 1984;Laing & Deacon, 1990) was investigated by studying interactions between hyphae of the mycoparasite and those of the host fungi. Using video microscopy to record the parasitism of hyphae of a number of host fungi, including Fusarium culmorum, by hyphae of P. oligandrum, P. mycoparasiticum and P. nunn, Laing & Deacon (1991) established that these mycoparasites had an identical mode of parasitism.…”