Interaction Between Pratylenchus coffeae and Pythium aphanidermatum and/or Rhizoctonia solani on Chrysanthemum*

Abstract

The interaction between Pratylenchus coffeae and Pythium aphanidermatum and/or Rhizoctonia solani on chrysanthemum and the influence of farmyard manure (FYM) on it was studied under pot conditions. The disease caused by P. aphanidermatum or R. solani was significantly high at var\'ing inocuiutn levels of Pratylenchus coffeae. The severiy further increased when nematode infected plants were inoculated with both the fungi together. Organic manunng also influenced the disease severity which was greatest in soils containing 200 % organic manure.The nematode population significantly increased in presence of R. solani, decreased in presence of P. aphanidermatum and remained unaffected when both the fungi occurred together around the plants. The nematode population was greatly reduced in soils containing 200 % organic manure. ZusammenfassungWechselwirkung zwischen Pratylenchus coffeae und Pythium aphanidermatum bzw. Rhizoctonia solani an Chrysanthemen

Interaction of Meloidogyne incognita (Kofoid & White, 1919) (Nemata: Meloidogynidae) and Fusarium oxysporum f. sp. radicis-lycopersici Jarvis & Shoemaker in tomato F1 hybrids with differing levels of resistance to these pathogens

“…In some studies, it has been reported that nematode penetration was enhanced by formation of fungal pathogen enzymes in the roots (Edmunds & Mai, 1966a, 1966bNordmeyer & Sikora, 1983). Although root lesion nematodes have a different trophic behavior to RKNs, there are studies that show interaction between these nematodes and plant pathogenic fungi increases the nematode density (Vrain, 1987;Hasan, 1988). Also, the lowest number of galls and egg masses in all tomato hybrids in the present study was with treatment FORL+10N because of the root rot caused by FORL affected the nematode feeding process in the root tissues and then negatively affected nematode reproduction.…”

Onion stunting in South Australia associated with Rhizoctonia solani AG 8

“…However, interactions between Pratylenchus spp. and R. solani have been reported in other crops (Hasan 1988;Kenyon et al 2007). In one of our experiments the most severe stunting developed where onions were grown in soil infected with both AG 8 and Pratylenchus.…”

Effects of root‐ and stolon‐infecting fungi on root‐colonizing nematodes of white clover

“…It has been reported in alfalfa that seedlings infested with F. oxysporum were more attractive to Pratylenchus penetrans than were healthy seedlings (Edmunds & Mai, 1967). Most of the reports of interactions between nematodes and fungi showed that the nematode populations were favoured by the presence of the fungi (Faulkner & Skotland, 1965; Vrain, 1987; Hasan, 1988). Such an effect may have applied in the present work with most fungal combinations.…”