Impact of Inoculum type and Mode of Inoculation Favouring Colletotrichum gloeosporioides in causing anthracnose Disease in Mango Fruits

Author: K. Jayaprakash, K. Prabakar, G. Karthikeyan, R. Gnanam and C. Kavitha

Download PDF

Abstract

Mango is a commercially cultivated in both tropical and sub tropical climatic zones. Mango anthracnose is caused by Colletotrichum gloeosporioides. The pathogen invades the fruit and sustains in inflorescence as quiescent infection and cause disease after the fruit reaches the harvesting stage. In leaves and fruit, it initially appears as black sunken spots later coalesce to form large necrotic lesions leading to death of tissues. In order to manage the disease, knowledge about survival, multiplication and spread of the pathogen is essential. Hence in this study, evaluation was done on the different method of inoculation and type of inoculation that involves in successful establishment and spread of disease. As a result of investigation it was found that fruit inoculated with spores alone was able to produce symptoms at early stage and causes rotting of fruits compared to other mode of inoculation and inoculum types. Early stage of infection leads to further production of secondary inoculum which tends to infect nearby healthy susceptible crops and host tissues.

Keywords

Method of inoculation, Mode of inoculation, spore suspension, inoculum

Conclusion

From the results, it can be concluded that next to natural openings present in plants and fruits, for a successful infection and disease establishment, openings caused by injuries plays major role in favoring entry of pathogen that can occur due to post harvest agricultural practices and exportation injuries. It was also observed that conidial suspension achieved highest percent disease incidence as well as maximum lesion size with in short period of time which also gives a lead to production of more secondary inoculum for the rapid spread of disease when compared to mycelium as a inoculation propagule. The finding not only applicable for disease establishment it totally describes about nature of fungal organisms which can be concluded that even biocontrol agent with high sporulation tendency can spread and survive in substrates in natural environment before the invasion of pathogen.

References

-

How to cite this article

K. Jayaprakash, K. Prabakar, G. Karthikeyan, R. Gnanam and C. Kavitha (2024). Impact of Inoculum type and Mode of Inoculation Favouring Colletotrichum gloeosporioides in causing anthracnose Disease in Mango Fruits. Biological Forum – An International Journal, 16(2): 81-85.