INTERACTION BETWEEN ROOT-LESION NEMATODE, PRATYLENCHUS-NEGLECTUS (RENSCH 1924) CHITWOOD AND OTEIFA 1952, AND ROOT ROTTING FUNGI OF WHEAT

Citation
A. Taheri et al., INTERACTION BETWEEN ROOT-LESION NEMATODE, PRATYLENCHUS-NEGLECTUS (RENSCH 1924) CHITWOOD AND OTEIFA 1952, AND ROOT ROTTING FUNGI OF WHEAT, New Zealand journal of crop and horticultural science, 22(2), 1994, pp. 181-185
Citations number
21
Categorie Soggetti
Agriculture
ISSN journal
01140671
Volume
22
Issue
2
Year of publication
1994
Pages
181 - 185
Database
ISI
SICI code
0114-0671(1994)22:2<181:IBRNP(>2.0.ZU;2-Q
Abstract
The most frequently isolated fungi from lesioned and non-lesioned segm ents of wheat roots collected from fields infested with Pratylenchus n eglectus were Fusarium oxysporum (Fo), F. acuminatum (Fa), F. equiseti (Fe), Microdochium bolleyi (Mb), Gaeumannomyces graminis (Gg), Bipola ris sorokiniana (Bs), Pythium irregulare (Pi), Pyrenochaeta terrestris (Pt), Phoma sp., and Ulocladium atrum. In a glasshouse experiment, so me of the above fungi plus Rhizoctonia solani (Rs) were tested singly and in selected combinations with and without P. neglectus. Number of nematodes per plant and per gram dry root and severity of root lesioni ng showed a positive interaction between some of these fungi and the n ematode. Inoculation with Rs, Mb, Bs, Gg + Fe, or Pi resulted in signi ficantly higher nematode populations per plant or per gram dry root. H owever, with Gg + Rs, nematode numbers were reduced. Pt, Pi, Fo, or Gg + Fe in combination with the nematode significantly increased severit y of root lesioning.