ISOLATION AND IDENTIFICATION OF THE PATHOGENS CAUSING ROOT ROT DISEASE IN ALFALFA AND THE EVALUATION OF ALFALFA RESISTANT VARIETIES TO Fusarium equiseti AND F. tricinctum

Author(s):  
Jianfeng Yang ◽  
◽  
Yuanyuan Zhang ◽  
Na Wang ◽  
Huan Liu ◽  
...  

, , , , , ,

1976 ◽  
Vol 56 (2) ◽  
pp. 97-103 ◽  
Author(s):  
SALIH M. DAMIRGI ◽  
F. D. COOK ◽  
G. R. WEBSTER

Attempts were made to evaluate the potential biological factor causing poor growth (stunting) of alfalfa (Medicago sativa L.) on some soils in Central Alberta. Paratylenchus projectus which associates with stunted alfalfa was extracted from an affected soil. Alfalfa seedlings grown in sterilized sand culture assemblies were inoculated with P. projectus alone and in combination with dilutions from sterilized and non-sterilized affected and normal soils. Other studies included the effects of various sterilized and non-sterilized soil dilutions from an affected soil on plant growth and incidence of alfalfa stunting symptoms. Results indicate that P. projectus is not the biological factor causing alfalfa stunting. Typical stunting symptoms were observed on plants receiving non-sterilized soil dilutions from an affected soil, and the consistency of development of irregular reddish-brown root lesions on stunted plant roots confirmed the presence of other biological factor(s) causing the disease. It was reasonably well established that the root rot disease was caused by a microorganism(s). Further studies regarding root lesioning, isolation and identification of the microorganisms are being carried on in this laboratory.


Plant Disease ◽  
2020 ◽  
Vol 104 (11) ◽  
pp. 3066
Author(s):  
Luchao Bai ◽  
Xuejuan Li ◽  
Yingtai Cao ◽  
Zuomin Song ◽  
Kun Ma ◽  
...  

2015 ◽  
Vol 10 (50) ◽  
pp. 4538-4542 ◽  
Author(s):  
Ngobisa A I C Nyaka ◽  
Djidjou P Kammegne ◽  
Ntsefong Godswill Ntsomboh ◽  
M Mbenoun ◽  
Simon Zok ◽  
...  

2021 ◽  
Vol 31 (1) ◽  
Author(s):  
Hammad Abdelwanees Ketta ◽  
Omar Abd El-Raouf Hewedy

Abstract Background Root rot pathogens reported to cause considerable losses in both the quality and productivity of common bean (Phaseolus vulgaris L.) and pea (Pisum sativum L.). It is an aggressive crop disease with detriment economic influence caused by Fusarium solani and Rhizoctonia solani among other soil-borne fungal pathogens. Destructive plant diseases such as root rot have been managed in the last decades using synthetic pesticides. Main body Seeking of economical and eco-friendly alternatives to combat aggressive soil-borne fungal pathogens that cause significant yield losses is urgently needed. Trichoderma emerged as promising antagonist that inhibits pathogens including those inducing root rot disease. Detailed studies for managing common bean and pea root rot disease using different Trichoderma species (T. harzianum, T. hamatum, T. viride, T. koningii, T. asperellum, T. atroviridae, T. lignorum, T. virens, T. longibrachiatum, T. cerinum, and T. album) were reported both in vitro and in vivo with promotion of plant growth and induction of systemic defense. The wide scale application of selected metabolites produced by Trichoderma spp. to induce host resistance and/or to promote crop yield, may represent a powerful tool for the implementation of integrated pest management strategies. Conclusions Biological management of common bean and pea root rot-inducing pathogens using various species of the Trichoderma fungus might have taken place during the recent years. Trichoderma species and their secondary metabolites are useful in the development of protection against root rot to bestow high-yielding common bean and pea crops.


Sign in / Sign up

Export Citation Format

Share Document